Use the following information for following questions .
The distribution of the number of hours people spend at work per day is unimodal
and symmetric with a mean of 8 hours and a standard deviation of 0.5 hours.
-If Anthony's z-score for his work hours was −1.3, how many hours did he work?
A)7.20 hours
B)7.35 hours
C)7.50 hours
D)8.65 hours

Question

Quizplus · Accepted Answer

A z-score of -1.3 means Anthony worked 1.3 standard deviations below the mean. Since the standard deviation is 0.5 hours, he worked 8 - (1.3 * 0.5) = 7.35 hours.

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