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Which of the following contains the interval two standard deviations f

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Which of the following contains the interval two standard deviations f  [#permalink]

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New post 18 Feb 2019, 10:27
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Which of the following contains the interval two standard deviations from the mean of a set of data with an arithmetic mean of 46 and a standard deviation of 4 ?

A. 38 to 46
B. 38 to 54
C. 42 to 50
D. 44 to 48
E. 46 to 50

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Re: Which of the following contains the interval two standard deviations f  [#permalink]

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New post 18 Feb 2019, 10:34
SajjadAhmad wrote:
Which of the following contains the interval two standard deviations from the mean of a set of data with an arithmetic mean of 46 and a standard deviation of 4 ?

A. 38 to 46
B. 38 to 54
C. 42 to 50
D. 44 to 48
E. 46 to 50



value = mean +2 * sd and mean-2* sd

so value ; 46 + 2*4 and 46-2*4
; 54 and 38
so value would be from 38 to 54 IMO B
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Re: Which of the following contains the interval two standard deviations f   [#permalink] 18 Feb 2019, 10:34
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Which of the following contains the interval two standard deviations f

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