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The standard deviation of snowfall for city x
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21 Jan 2022, 11:15
21 Jan 2022, 11:15
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Question Stats:
80% (01:07) correct
19% (01:18) wrong based on 21 sessions
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Quantity A |
Quantity B |
The standard deviation of snowfall for city x |
The standard deviation of snowfall for city y |
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.
Kudos for the right answer and explanation
see more GRE Tips and Tricks - UPDATED 01/18/2022
Re: The standard deviation of snowfall for city x
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24 Jan 2022, 06:18
24 Jan 2022, 06:18
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Re: The standard deviation of snowfall for city x
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24 Jan 2022, 07:44
24 Jan 2022, 07:44
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Carcass wrote:
Attachment:
screenshot.282.jpg
Quantity A |
Quantity B |
The standard deviation of snowfall for city x |
The standard deviation of snowfall for city y |
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.
Kudos for the right answer and explanation
see more GRE Tips and Tricks - UPDATED 01/18/2022
Let's arrange the results in ascending order...
City X: 2, 7, 15, 16
City Y: 6, 8, 9, 17
Since standard deviation is a measure of dispersion (how dispersed the numbers are), let's examine the DIFFERENCE between each pair of numbers for each city
City X: 7 - 2 = 5, 15 - 7 = 8 and 16 - 15 = 1
City Y: 8 - 6 = 2, 9 - 8 = 1 and 17 - 9 = 8
As we can see, the values for city X are slightly more dispersed than are the values for city Y, which means the standard deviation for City X must be greater.
Answer: A
