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In a certain sample of data, the mean is 80 and the standard deviation
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23 Oct 2024, 00:00
23 Oct 2024, 00:00
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50% (01:56) wrong based on 6 sessions
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In a certain sample of data, the mean is 80 and the standard deviation is 4. Which of the following values are more than 7.5 standard deviations from the mean?
A. 120
B. 100
C. 110
D. 50
A. 120
B. 100
C. 110
D. 50
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Re: In a certain sample of data, the mean is 80 and the standard deviation
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23 Oct 2024, 01:48
23 Oct 2024, 01:48
120 is 10 standard deviations away.
100 is 5 standard deviations away.
110 and 50 are both exactly 7.5 standard deviations away.
Only 120 is more than 7.5 standard deviations from the mean, so the answer is A. 120.
100 is 5 standard deviations away.
110 and 50 are both exactly 7.5 standard deviations away.
Only 120 is more than 7.5 standard deviations from the mean, so the answer is A. 120.
gmatclubot
Re: In a certain sample of data, the mean is 80 and the standard deviation [#permalink]
23 Oct 2024, 01:48
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