question stringlengths 18 867 | subject stringclasses 18
values | choices listlengths 4 4 | answer int64 0 3 | reasoning int64 0 3 |
|---|---|---|---|---|
Which of the following best describes the joint probability distribution P(X, Y, Z) for the given Bayes net. X <- Y -> Z? | machine_learning | [
"P(X, Y, Z) = P(Y) * P(X|Y) * P(Z|Y)",
"P(X, Y, Z) = P(X) * P(Y|X) * P(Z|Y)",
"P(X, Y, Z) = P(Z) * P(X|Z) * P(Y|Z)",
"P(X, Y, Z) = P(X) * P(Y) * P(Z)"
] | 0 | 0 |
Frankie’s baseball team scored 16 runs in a game. Max’s baseball team scored 8 runs in a game. Which statement about the number of runs scored by Frankie’s and Max’s baseball teams is true? | elementary_mathematics | [
"Frankie’s team scored 2 times as many runs as Max’s team because 16 = 2 × 8.",
"Frankie’s team scored 2 times as many runs as Max’s team because 8 = 2 × 16.",
"Max’s team scored 2 times as many runs as Frankie’s team because 16 = 2 × 8.",
"Max’s team scored 2 times as many runs as Frankie’s team because 8 = ... | 0 | 0 |
Two students perform an experiment in which they drop a ball from rest from a known height above the ground and measure the speed of the ball just before it strikes the ground. From repeated measurement, the students estimate the uncertainty in the measured speed of the ball to be 10 percent. Which of the following giv... | college_physics | [
"5%",
"10%",
"15%",
"20%"
] | 3 | 3 |
When checked with an ohm meter an open resistor reads | electrical_engineering | [
"high but within tolerance.",
"low but not zero.",
"zero.",
"infinite."
] | 3 | 3 |
A spherical conductor carries a net charge. How is this charge distributed on the sphere? | high_school_physics | [
"The charge is evenly distributed on the surface.",
"The charge resides on the surface only; the distribution of charge on the surface depends on what other charged objects are near the sphere.",
"The charge moves continually within the sphere.",
"The charge is distributed uniformly throughout the sphere."
] | 1 | 1 |
You cool a blackbody to half its original temperature. How does its spectrum change? | astronomy | [
"Power emitted is 1/16 times as high; peak emission wavelength is 1/2 as long.",
"Power emitted is 1/4 times as high; peak emission wavelength is 2 times longer.",
"Power emitted is 1/4 times as high; peak emission wavelength is 1/2 as long.",
"Power emitted is 1/16 times as high; peak emission wavelength is ... | 3 | 3 |
A plant that possesses swimming sperm, xylem with tracheids, independent gametophyte and sporophyte phases, and no seeds is probably most closely related to | college_biology | [
"mosses",
"pines",
"ferns",
"liverworts"
] | 2 | 2 |
Solve −2k = −34.8. | elementary_mathematics | [
"−69.6",
"−17.4",
"17.4",
"69.6"
] | 3 | 3 |
Immediately after two separated charged particles are released from rest, both increase in speed. The sign of charge of the particles is therefore | conceptual_physics | [
"the same",
"opposite",
"Either of these",
"Need more information"
] | 2 | 2 |
Of the following page-replacement policies, which is guaranteed to incur the minimum number of page faults? | college_computer_science | [
"Replace the page whose next reference will be the longest time in the future.",
"Replace the page whose next reference will be the shortest time in the future.",
"Replace the page whose most recent reference was the shortest time in the past.",
"Replace the page whose most recent reference was the longest ti... | 0 | 0 |
The average mass, in grams, of one mole of carbon atoms is equal to | high_school_chemistry | [
"the average mass of a single carbon atom, measured in amus.",
"the ratio of the number of carbon atoms to the mass of a single carbon atom.",
"the number of carbon atoms in one amu of carbon.",
"the mass, in grams, of the most abundant isotope of carbon."
] | 0 | 0 |
Which of the following does authentication aim to accomplish? | computer_security | [
"Restrict what operations/data the user can access",
"Determine if the user is an attacker",
"Flag the user if he/she misbehaves",
"Determine who the user is"
] | 3 | 3 |
Statement 1| The L2 penalty in a ridge regression is equivalent to a Laplace prior on the weights. Statement 2| There is at least one set of 4 points in R^3 that can be shattered by the hypothesis set of all 2D planes in R^3. | machine_learning | [
"True, True",
"False, False",
"True, False",
"False, True"
] | 3 | 3 |
Exits on a highway are numbered consecutively from 1 to 50. The distance from exit 41 to exit 50 is 100 km. If each exit is at least 6 km from the next exit, what is the longest possible distance, in kilometers, between exit 47 and exit 48? | high_school_mathematics | [
"52",
"51",
"50",
"49"
] | 0 | 0 |
A large hospital maintains a list of patients’ records in no particular order. To find the record of a given patient, which represents the most efficient method that will work? | high_school_computer_science | [
"Do a sequential search on the name field of the records.",
"Do a binary search on the name field of the records.",
"Use insertion sort to sort the records alphabetically by name; then do a sequential search on the name field of the records.",
"Usemergesort to sort the records alphabetically by name; then do ... | 0 | 0 |
Which of the following sets of reactions occurs in the stroma of the chloroplast in plant cells? | college_biology | [
"Calvin cycle",
"Krebs cycle",
"Fermentation",
"Decarboxylation"
] | 0 | 0 |
The reason that small planets tend to lose interior heat faster than larger planets is essentially the same as the reason that ________. | astronomy | [
"a large baked potato takes longer to cool than a small baked potato",
"Earth contains more metal than the Moon",
"thunderstorms tend to form on hot summer days",
"gas bubbles form and rise upward in boiling water"
] | 0 | 0 |
What is the dimensionality of the null space of the following matrix? A = [[1, 1, 1], [1, 1, 1], [1, 1, 1]] | machine_learning | [
"0",
"1",
"2",
"3"
] | 2 | 2 |
A digital circuit that can store on bit is a | electrical_engineering | [
"XOR gate",
"flip-flop",
"gate",
"registor"
] | 1 | 1 |
Find the order of the factor group Z_6/<3>. | abstract_algebra | [
"2",
"3",
"6",
"12"
] | 1 | 1 |
From quantum mechanics we learn that a radioactive nucleus is governed by | conceptual_physics | [
"Newton’s laws",
"probability",
"certainty",
"no laws at all"
] | 1 | 1 |
Given that $a(a+2b) = \frac{104}3$, $b(b+2c) = \frac{7}{9}$, and $c(c+2a) = -7$, find $|a+b+c|$. | high_school_mathematics | [
"\\frac{23}{3}",
"\\frac{5}{3}",
"\\frac{16}{3}",
"\\frac{10}{3}"
] | 2 | 2 |
Electromagnetic radiation emitted from a nucleus is most likely to be in the form of | college_physics | [
"gamma rays",
"microwaves",
"ultraviolet radiation",
"visible light"
] | 0 | 0 |
Which of the following best describes a Web server? | high_school_computer_science | [
"A computer system that delivers Web pages to clients",
"A computer system that determines the shortest path between two computers over the Internet",
"A computer system running software that provides a user-friendly interface for creating Web pages",
"A computer system that translates domain names to IP addr... | 0 | 0 |
Reduction of D-xylose with NaBH4 yields a product that is a | college_chemistry | [
"racemic mixture",
"single pure enantiomer",
"mixture of two diastereomers in equal amounts",
"meso compound"
] | 3 | 3 |
A high-temperature source radiates relatively | conceptual_physics | [
"short wavelengths",
"long wavelengths",
"low frequencies of radiation",
"None of these"
] | 0 | 0 |
Solve 3 over 2 * w = 66. | elementary_mathematics | [
"33",
"44",
"88",
"99"
] | 1 | 1 |
The openSSL implementation described in “Remote Timing Attacks are Practical” (by Brumley and Boneh) uses the following performance optimizations: Chinese Remainder (CR), Montgomery Representation (MR), Karatsuba Multiplication (KM), and Repeated squaring and Sliding windows (RS). Which of the following options would c... | computer_security | [
"True, True",
"False, False",
"True, False",
"False, True"
] | 2 | 2 |
A librarian receives two boxes of booksfor the library. The first box has 136 books. The second box has 58 fewer books than the first box. What is the total number of books the librarian receives? | elementary_mathematics | [
"58",
"78",
"194",
"214"
] | 3 | 3 |
Based on periodic relationships, the bond strength, and the concept relating bond strength to acid strengths, which of the following correctly predicts the strength of binary acids from strongest to weakest? | high_school_chemistry | [
"H2Se > H2O > H2S",
"H2Se > H2S > H2O",
"H2O < H2S < H2Se",
"H2O > H2S > H2Se"
] | 1 | 1 |
If L, M, and T denote the dimensions of length, mass, and time, respectively, what are the dimensions of power? | high_school_physics | [
"(L^2)M/T^2",
"(M^2)L/T^2",
"(L^2)M/T^3",
"M(L^2)/T^3"
] | 3 | 3 |
An experiment was performed to determine the moles of hydrogen gas formed (collected over water) when an acid reacts with magnesium metal. To do this, a piece of dry magnesium was weighed. Then 50 mL of hydrogen was collected. Next the Mg was dried to remove about 0.1 mL of water and weighed again to see how much Mg ha... | high_school_chemistry | [
"Forgetting to dry the magnesium before both weighings",
"Failing to take the vapor pressure of water (23 torr at 25 °C) into account",
"Failing to convert °C to K",
"Reading the gas-collecting container to ±20 mL"
] | 2 | 2 |
What dangers are currently faced by each Mars Exploration Rover? | astronomy | [
"Opportunity may not be able to drive out of Victoria Crater due to its broken sixth wheel; Spirit's instruments are being corroded by the acidic hot spring environment it is exploring.",
"Opportunity may not be able to move its arm again; Spirit may not be able to drive out of Victoria Crater due to its broken s... | 3 | 3 |
A cell from the leaf of the aquatic plant Elodea was soaked in a 15 percent sugar solution, and its contents soon separated from the cell wall and formed a mass in the center of the cell. All of the following statements are true about this event EXCEPT | high_school_biology | [
"the vacuole lost water and became smaller",
"the space between the cell wall and the cell membrane expanded",
"the large vacuole contained a solution with much lower osmotic pressure than that of the sugar solution",
"the concentration of solutes in the extracellular environment is hypertonic with respect to... | 3 | 3 |
Einstein’s second postulate tells us that the speed of light | conceptual_physics | [
"depends on one’s frame of reference.",
"is a constant in all frames of reference.",
"provides accurate clocks.",
"slows in a transparent medium."
] | 1 | 1 |
In cloning experiments on the frog Xenopus laevis, nuclei were removed from intestinal cells of tadpoles and transplanted into zygotes whose nuclei had been removed. A small percent of these zygotes developed into normal frogs, suggesting that | college_biology | [
"intestinal cells can be transformed into all cell types",
"frogs do not have the same developmental constraints as other species",
"intestinal cell nuclei are highly specialized",
"the genomes of all somatic cells are equivalent"
] | 3 | 3 |
The anhydride of Ba(OH)2 is | college_chemistry | [
"BaH2",
"BaOH",
"Ba",
"BaO"
] | 3 | 3 |
Which number system has a base of 16 | electrical_engineering | [
"Decimal",
"Octal",
"Hexadecimal",
"None"
] | 2 | 2 |
Dissolving one mole of each of the oxoacids HNO2, HClO4, H2CO3, and H3PO4 in 2.0 L of distilled water results in solutions with different pH values. Arrange these acid solutions from the one with the highest pH to the one with the lowest pH. | high_school_chemistry | [
"HNO2 > HClO4 > H2CO3 > H3PO4",
"HClO4 > HNO2 > H2CO3 > H3PO4",
"H2CO3 > H3PO4 > HNO2 > HClO4",
"H2CO3 > HNO2 > HClO4 > H3PO4"
] | 2 | 2 |
No load saturation characteristics are plotted between | electrical_engineering | [
"no load voltage and field current",
"no load voltage and armature current",
"short circuit current and field current",
"short circuit current and armature current"
] | 0 | 0 |
How have we been able to construct detailed maps of surface features on Venus? | astronomy | [
"by studying Venus from Earth with powerful optical telescopes",
"by landing spacecraft on the surface for close-up study",
"by studying Venus with powerful optical telescopes on spacecraft that were sent to orbit Venus",
"by using radar from spacecraft that were sent to orbit Venus"
] | 3 | 3 |
Use rounding to estimate the product of 8.2 • 6.43 to the nearest whole number. | elementary_mathematics | [
"48",
"56",
"62",
"24"
] | 1 | 1 |
Consider a ball rolling down an inclined plane. The normal force on the ball (the force perpendicular to the plane). | conceptual_physics | [
"is mg",
"is greater than mg always",
"may be greater or less than mg",
"is less than mg always"
] | 3 | 3 |
A hash function guarantees the integrity of a message. It guarantees that the message has not be | computer_security | [
"Replaced",
"Overview",
"Changed",
"Violated"
] | 2 | 2 |
A comet’s tail points in the following direction: | astronomy | [
"away from the Sun",
"towards the Sun",
"in the direction of movement",
"against the direction of movement"
] | 0 | 0 |
Statement 1 | If a group has an element of order 10, then the number of elements of order 10 is divisible by 4. Statement 2 | If m and n are positive integers and phi is the Euler phi function, then phi(mn) = phi(m)phi(n). | abstract_algebra | [
"True, True",
"False, False",
"True, False",
"False, True"
] | 1 | 1 |
___________ is a process of wireless traffic analysis that may be helpful for forensic investigations or during troubleshooting any wireless issue. | computer_security | [
"Wireless Traffic Sniffing",
"WiFi Traffic Sniffing",
"Wireless Traffic Checking",
"Wireless Transmission Sniffing"
] | 0 | 0 |
Statement 1 | The symmetric group S_3 is cyclic. Statement 2 | Every group is isomorphic to some group of permutations. | abstract_algebra | [
"True, True",
"False, False",
"True, False",
"False, True"
] | 3 | 3 |
What is the minimum value of $a^2+6a-7$? | high_school_mathematics | [
"-30",
"-12",
"-7",
"-16"
] | 3 | 3 |
Which of the following is NOT a characteristic of an oligotrophic lake? | college_biology | [
"Low nutrient levels",
"High altitudes",
"Shallow water",
"Sand or gravel bottom"
] | 2 | 2 |
Debnil has 6 teaspoons of salt. The ratio of teaspoons to tablespoons is 3 : 1. How many tablespoons of salt does Debnil have? | elementary_mathematics | [
"18-Jan",
"2-Jan",
"2",
"18"
] | 2 | 2 |
For which of these is a binomial probability model most reasonable? | high_school_statistics | [
"The number of times, out of 10 attempts, that a particular child can throw a ball into a basket from six feet away",
"The colors of the cars in the parking lot of a particular grocery store on a randomly selected Sunday",
"The number of times that a randomly selected resident of California has visited a museum... | 0 | 0 |
Some animals have patterns that can cause a predator to think twice before attacking. | high_school_biology | [
"Aposomatic coloration",
"Batesian mimicry",
"Deceptive markings",
"Cryptic coloration"
] | 2 | 2 |
A scientist measured the diameters of four human hairs. The diameters, in millimeters, were 0.091, 0.169, 0.17, and 0.023. Which inequality correctly compares the diameters of two of the human hairs? | elementary_mathematics | [
"0.17 > 0.023",
"0.091 < 0.023",
"0.169 > 0.17",
"0.17 < 0.091"
] | 0 | 0 |
A sample of size 35 is to be drawn from a large population. The sampling technique is such that every possible sample of size 35 that could be drawn from the population is equally likely. What name is given to this type of sample? | high_school_statistics | [
"Systematic sample",
"Cluster sample",
"Voluntary response sample",
"Simple random sample"
] | 3 | 3 |
Collin spent 7 hours volunteering last month. Vanessa spent 21 hours volunteering last month. Which equation correctly shows how many times more hours Vanessa spent volunteering last month than Collin? | elementary_mathematics | [
"7 × 3 = 21",
"7 × 14 = 21",
"21 × 3 = 63",
"21 × 7 = 147"
] | 0 | 0 |
If one arch of the curve y = sin x is revolved around the x-axis, what's the volume of the generated solid? | college_mathematics | [
"π^2 / 4",
"π^2 / 2",
"2π",
"π^2"
] | 1 | 1 |
Which of the following statements describes the structural level of a protein that is least affected by hydrogen bonding? | high_school_biology | [
"Primary structure depends on the sequence of amino acids.",
"Tertiary structure has a shape dependent on the interactions of side chains of amino acids.",
"Quaternary structure results from the aggregation of more than one polypeptide unit.",
"An α-helix is an example of a secondary structure of a polypeptid... | 0 | 0 |
According to the correspondence principle, | conceptual_physics | [
"new theory must agree with old theory where they overlap.",
"Newton’s mechanics is as valid as Einstein’s mechanics.",
"relativity equations apply to high speeds while Newton’s equations apply to low speeds.",
"special relativity and general relativity are two sides of the same coin."
] | 0 | 0 |
Atmospheric pressure is due to the weight | conceptual_physics | [
"of the atmosphere",
"and volume of the atmosphere",
"density and volume of the atmosphere",
"of planet Earth itself"
] | 0 | 0 |
What is the maximum value of $4(x + 7)(2 - x)$, over all real numbers $x$? | high_school_mathematics | [
"-2.5",
"4",
"81",
"56"
] | 2 | 2 |
In DNA replication, which of the following does NOT occur? | high_school_biology | [
"Helicase unwinds the double helix.",
"DNA ligase links the Okazaki fragments.",
"RNA polymerase is used to elongate both chains of the helix.",
"DNA strands grow in the 5' to 3' direction."
] | 2 | 2 |
A swimmer is able to propel himself forward through the water by moving his arms. Which of the following correctly states the applicant and recipient of the force responsible for the swimmer’s forward acceleration? | high_school_physics | [
"The force of the surrounding water on the swimmer’s arms",
"The force of the swimmer’s arms on the swimmer’s torso",
"The force of the swimmer’s arms on the surrounding water",
"The force of the swimmer’s torso on the swimmer’s arms"
] | 0 | 0 |
Which of these naturalists synthesized a concept of natural selection independently of Darwin? | high_school_biology | [
"Charles Lyell",
"Gregor Mendel",
"Alfred Wallace",
"John Henslow"
] | 2 | 2 |
Celia has a large container in which four different kinds of coins are thoroughly mixed. She wants to take a sample of her coins to estimate which kind of coin she has the most. Which of the following methods is the best way for her to select a sample? | elementary_mathematics | [
"taking one coin from the container",
"taking coins until she has one of every kind",
"taking ten coins of each type from the container",
"taking thirty coins out of the container without looking"
] | 3 | 3 |
Which is a valid expression in Python 3.5? | high_school_computer_science | [
"sort('ab')",
"sorted('ab')",
"\"ab\".sort()",
"1/0"
] | 1 | 1 |
Which of the following salts is expected to produce an alkaline solution when one mole is dissolved in one liter of water? | high_school_chemistry | [
"NaClO4",
"CaCl2",
"NH4Br",
"Na2S"
] | 3 | 3 |
In a group of 11 people, T of them always tell the truth, and L always lie. Each person names two other people and claims that of the two, exactly one of them is lying. Each person is named in this way by exactly two other people. Find the sum of all possible values of T. | high_school_mathematics | [
"30",
"12",
"20",
"6"
] | 1 | 1 |
A fruit fly population has a gene with two alleles, A1 and A2. Tests show that 70% of the gametes produced in the population contain the A1 allele. If the population is in Hardy-Weinberg equilibrium, what proportion of the flies carry both A1 and A2? | high_school_biology | [
"0.7",
"0.49",
"0.21",
"0.42"
] | 3 | 3 |
Why is it that anti-virus scanners would not have found an exploitation of Heartbleed? | computer_security | [
"It's a vacuous question: Heartbleed only reads outside a buffer, so there is no possible exploit ",
"Anti-virus scanners tend to look for viruses and other malicious",
"Heartbleed attacks the anti-virus scanner itself",
"Anti-virus scanners tend to look for viruses and other malicious code, but Heartbleed ex... | 3 | 3 |
The number of leasable square feet of office space available in a city on any given day has a normal distribution with mean 640,000 square feet and standard deviation 18,000 square feet. What is the interquartile range for this distribution? | high_school_statistics | [
"652,000 - 628,000",
"658,000 - 622,000",
"667,000 - 613,000",
"676,000 - 604,000"
] | 0 | 0 |
The number of test examples needed to get statistically significant results should be _ | machine_learning | [
"Larger if the error rate is larger.",
"Larger if the error rate is smaller.",
"Smaller if the error rate is smaller.",
"It does not matter."
] | 1 | 1 |
A particular crop of one variety of onion has weights that are approximately normally distributed with mean 9.8 oz. and standard deviation 2.1 oz. How does an onion in the 28th percentile for weight compare to the mean? | high_school_statistics | [
"1.22 ounces below the mean",
"0.59 ounces below the mean",
"0.59 ounces above the mean",
"1.22 ounces above the mean"
] | 0 | 0 |
A machine cannot multiply | conceptual_physics | [
"forces",
"distances",
"energy",
"None of these"
] | 2 | 2 |
In basketball, an offensive rebound occurs when a player shoots and misses, and a player from the same team recovers the ball. For the 176 players on the roster for one season of professional men's basketball, the third quartile for the total number of offensive rebounds for one season was 143. If five players are sele... | high_school_statistics | [
"0.0127",
"0.0879",
"0.1035",
"0.8965"
] | 2 | 2 |
Statement 1 | If a and b are elements of finite order in an Abelian group, then |ab| is the lcm (|a|,|b|). Statement 2 | If g is a group element and g^n = e, then |g| = n. | abstract_algebra | [
"True, True",
"False, False",
"True, False",
"False, True"
] | 1 | 1 |
If L is a language accepted by some automaton M, which of the following is (are) true?
I. If M is a nondeterministic finite automaton, then L is accepted by some deterministic finite automaton.
II. If M is a deterministic pushdown automaton, then L is accepted by some nondeterministic pushdown automaton.
III. If M is a... | college_computer_science | [
"III only",
"I and II only",
"II and III only",
"I, II, and III"
] | 3 | 3 |
What is penetration testing? | computer_security | [
"A procedure for testing libraries or other program components for vulnerabilities",
"Whole-system testing for security flaws and bugs",
"A security-minded form of unit testing that applies early in the development process",
"All of the above"
] | 1 | 1 |
Mr. Carson drove 1,027 miles in April. He drove 988 miles in May. Mr. Carson used the expression below to find how many more miles he drove in April than in May. 1,027 – 988 How many more miles did Mr. Carson drive in April than in May? | elementary_mathematics | [
"39 miles",
"139 miles",
"161 miles",
"1,961 miles"
] | 0 | 0 |
How many integers 1-9 are divisors of the five-digit number 24,516? | high_school_mathematics | [
"6",
"5",
"1",
"32"
] | 0 | 0 |
Church's thesis equates the concept of "computable function" with those functions computable by, for example, Turing machines. Which of the following is true of Church's thesis? | college_computer_science | [
"It was first proven by Alan Turing.",
"It has not yet been proven, but finding a proof is a subject of active research.",
"It can never be proven.",
"It is now in doubt because of the advent of parallel computers."
] | 2 | 2 |
The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most... | high_school_biology | [
"Humans and bats evolved by natural selection, and whales evolved by Lamarckian mechanisms.",
"Forelimb evolution was adaptive in people and bats, but not in whales.",
"Natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy.",
"Genes mutate faster in whales than ... | 2 | 2 |
All of the following are differences between prokaryotes and eukaryotes EXCEPT | high_school_biology | [
"eukaryotes have linear chromosomes, while prokaryotes have circular chromosomes",
"eukaryotes possess double stranded DNA, while prokaryotes possess single stranded DNA",
"eukaryotes process their mRNA, while in prokaryotes, transcription and translation occur simultaneously",
"eukaryotes contain membrane-bo... | 0 | 0 |
Which is the least likely cause of death? | astronomy | [
"Being hit in the head by a bullet.",
"Being hit by a small meteorite.",
"Starvation during global winter caused by a major impact.",
"Driving while intoxicated without wearing seatbelts."
] | 1 | 1 |
Which of the following statements about Naive Bayes is incorrect? | machine_learning | [
"Attributes are equally important.",
"Attributes are statistically dependent of one another given the class value.",
"Attributes are statistically independent of one another given the class value.",
"Attributes can be nominal or numeric"
] | 1 | 1 |
Random samples of size n are drawn from a population. The mean of each sample is calculated, and the standard deviation of this set of sample means is found. Then the procedure is repeated, this time with samples of size 4n. How does the standard deviation of the second group compare with the standard deviation of the ... | high_school_statistics | [
"It will be the same.",
"It will be twice as large.",
"It will be four times as large.",
"It will be half as large."
] | 3 | 3 |
A survey was conducted to determine the percentage of parents who would support raising the legal driving age to 18. The results were stated as 67% with a margin of error of ±3%. What is meant by ±3%? | high_school_statistics | [
"Three percent of the population were not surveyed.",
"In the sample, the percentage of parents who would support raising the driving age is between 64% and 70%.",
"The percentage of the entire population of parents who would support raising the driving age is between 64% and 70%.",
"It is unlikely that the g... | 3 | 3 |
Consider the following possible data structures for a set of n distinct integers.
I. A min-heap
II. An array of length n sorted in increasing order
III. A balanced binary search tree
For which of these data structures is the number of steps needed to find and remove the 7th largest element O(log n) in the worst case? | college_computer_science | [
"I only",
"II only",
"I and II",
"II and III"
] | 3 | 3 |
Assume that a TLS connection has been established successfully between a client and a server. Establishing the session included checking the server certificate and executing a DiffieHelmann exchange, but the client did not provide a client certificate. Further, assume that the client and server are honest, that the cli... | computer_security | [
"True, True",
"False, False",
"True, False",
"False, True"
] | 2 | 2 |
Characteristic X rays, appearing as sharp lines on a continuous background, are produced when high-energy electrons bombard a metal target. Which of the following processes results in the characteristic X rays? | college_physics | [
"Electrons producing Čerenkov radiation",
"Electrons colliding with phonons in the metal",
"Electrons filling inner shell vacancies that are created in the metal atoms",
"Electrons combining with protons to form neutrons"
] | 2 | 2 |
All of the following statements are correct regarding alleles EXCEPT | high_school_biology | [
"alleles are alternative forms of the same gene",
"alleles are found on corresponding loci of homologous chromosomes",
"a gene can have more than two alleles",
"an individual with two identical alleles is said to be heterozygous with respect to that gene"
] | 3 | 3 |
Alex grows an initial culture of 100 Rhizopus stolonifer fungi on a sample of bread. She wants to model the growth of the fungi according to the exponential equation A = Pe^(rt), where A is the final number of fungi, P is the initial number, r is the growth rate, and t is time elapsed in hours. If after 5 hours she mea... | high_school_mathematics | [
"0.403",
"0.863",
"2.015",
"4.317"
] | 0 | 0 |
What is the square of 15? | elementary_mathematics | [
"15",
"15-Jan",
"225",
"256"
] | 2 | 2 |
When $\sqrt[3]{-128}$ is simplified, the result is $a\sqrt[3]{b}$, where $a$ is an integer, and $b$ is a positive integer. If $b$ is as small as possible, then what is $a+b$? | high_school_mathematics | [
"2",
"-4",
"6",
"-2"
] | 3 | 3 |
A teacher can grade 20 papers during an uninterrupted planning period and 10 papers for each hour he spends at home grading. What function models the number of papers he can grade given that he has 2 uninterrupted planning periods and x full hours devoted to grading at home? | high_school_mathematics | [
"20 + 2x",
"20x + 10",
"40x + 10",
"40 + 10x"
] | 3 | 3 |
Three distinct bird species, flicker, woodpecker, and elf owl, all inhabit a large cactus, Cereus giganteus, in the desert of Arizona. Since competition among these birds rarely occurs, the most likely explanation for this phenomenon is that these birds | high_school_biology | [
"have a short supply of resources",
"have different ecological niches",
"do not live together long",
"are unable to breed"
] | 1 | 1 |
RNA is thought to have played an important role in the evolution of life for which of the following reasons?
I. It occurred in great quantities on early Earth.
II. It can self-replicate via a complementary chain.
III. It can catalyze some cellular functions. | college_biology | [
"I only",
"II only",
"III only",
"II and III"
] | 3 | 3 |
In a survey of 100 undergraduate math majors at a certain college, the following information is
obtained about the courses they are taking during the Spring semester:
41 are enrolled in real analysis,
44 are enrolled in differential equations, 48 are enrolled in linear algebra,
11 are enrolled in both real analysis... | college_mathematics | [
"1",
"2",
"3",
"4"
] | 0 | 0 |
Planck’s constant can be found by dividing the energy of a photon by its | conceptual_physics | [
"wavelength",
"frequency",
"amplitude",
"None of these"
] | 1 | 1 |
A motor has a thermal heating time constant of 50 mm. When the motor runs continuous of full scale, its final temperature rise is 80° C, what would be the temperature rise after 1 hour, if the motor runs continuously on full load? | electrical_engineering | [
"55.9° C.",
"58° C.",
"56° C.",
"60° C."
] | 0 | 0 |
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