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The standard deviation of grades on the math exam.
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24 Aug 2020, 10:23
24 Aug 2020, 10:23
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GRE The standard deviation.png [ 9.35 KiB | Viewed 2122 times ]
Quantity A |
Quantity B |
The standard deviation of grades on the math exam |
The standard deviation of grades on the chemistry exam |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Re: The standard deviation of grades on the math exam.
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24 Aug 2020, 10:24
24 Aug 2020, 10:24
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
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Re: The standard deviation of grades on the math exam.
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24 Aug 2020, 14:18
24 Aug 2020, 14:18
Carcass wrote:
Attachment:
GRE The standard deviation.png
Quantity A |
Quantity B |
The standard deviation of grades on the math exam |
The standard deviation of grades on the chemistry exam |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
The standard deviation is a measure of the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range.
We don't need to calculate them accurately for the actual standard deviations.
We just compare the distributions of grades in both exams if they are clear.
The grades in Math exam are spread out wider than the grades in Chemistry exam obviously.
Thus, A is greater than B.
Therefore, A is the right answer.
