Card 7 / 11: If the mean number of doughnut holes consumed by each customer is 6.5, with a standard deviation of 2.5, and if we assume that the number of doughnut holes eaten follows a normal distribution, we would expect 68% of customers to have eaten how many doughnut holes?
A)
4 to 9
B)
2.5 to 11.5
C)
1 to 14
D)
6.5 to 15
E)
Cannot be determined from the information given. You need to know the sample size.
Answer:
A) 4 to 9
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Epidemiology Biostatistics Descriptive Statistics
Author:
Dr.Janet ForresterProfessor
Tufts University School of Medicine
USA
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