Mathematics, 14.04.2020 21:14 bangbrokevo5685
The amount of time it takes on an exam is normally distributed with a mean of 72 minutes and standard deviation 4 minutes. Suppose you take a random sample of 64 students from this population. There would be a 99.7% chance that the sample mean amount of time taken on the exam would be between:
A. 68 and 76 minutes
B. 71 and 73 minutes
C. 70.5 and 73.5 minutes
D. 60 and 84 minutes
Answers: 2
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