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29 Sep 2024, 03:47
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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Question Stats:
50% (00:51) correct
50% (00:11) wrong based on 2 sessions
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The distribution of the numbers of hours that students at a certain college studied for final exams has a mean of 12 hours and a standard deviation of 3 hours. Which of the following numbers of hours are within 2 standard deviations of the mean of the distribution?
Indicate all such numbers.
A. 2
B. 5
C. 10
D. 14
E. 16
F. 20
Indicate all such numbers.
A. 2
B. 5
C. 10
D. 14
E. 16
F. 20
10 Feb 2025, 10:44
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OE
Given that the mean of the distribution is 12 hours and the standard deviation is 3 hours, the numbers of hours within 2 standard deviations of the mean are all numbers of hours between 12 - 2(3), or 6, and 12 + 2(3), or 18. Thus the correct answer consists of Choices C, D, and E.
Given that the mean of the distribution is 12 hours and the standard deviation is 3 hours, the numbers of hours within 2 standard deviations of the mean are all numbers of hours between 12 - 2(3), or 6, and 12 + 2(3), or 18. Thus the correct answer consists of Choices C, D, and E.
