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S is the set of all test scores in Ms. K’s class. T is the s
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14 Oct 2020, 08:27
14 Oct 2020, 08:27
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81% (00:28) correct
18% (00:35) wrong based on 49 sessions
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S is the set of all test scores in Ms. K’s class.
T is the set of all test scores in Ms. K’s class, after Ms.
K added 10 points to every test score in the class.
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
T is the set of all test scores in Ms. K’s class, after Ms.
K added 10 points to every test score in the class.
Quantity A |
Quantity B |
The standard deviation of set S |
The standard deviation of set T |
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
Re: S is the set of all test scores in Ms. K’s class. T is the s
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21 Oct 2020, 17:58
21 Oct 2020, 17:58
1
Both sets have the same standard deviation. The answer is C.
Standard deviation is a measure of the spread of the data around the mean. If you add the same number to each element of the set, in this case 10, the new mean of the set will be 10 points higher. So the distance of each point to the new mean will be the same as before.
Standard deviation is a measure of the spread of the data around the mean. If you add the same number to each element of the set, in this case 10, the new mean of the set will be 10 points higher. So the distance of each point to the new mean will be the same as before.
gmatclubot
Re: S is the set of all test scores in Ms. K’s class. T is the s [#permalink]
21 Oct 2020, 17:58
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