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.
-95% of all people work between and hours per day?
A)7.5 and 8.5 hours
B)7 and 8.5 hours
C)7.5 and 9 hours
D)7 and 9 hours

Question

Quizplus · Accepted Answer

Given the distribution is unimodal and symmetric with a mean of 8 hours and a standard deviation of 0.5 hours, and knowing that 95% of the data within a normal distribution lies within 2 standard deviations of the mean, we calculate the range as 8 ± (2 * 0.5) = 7 to 9 hours.

Use the Following Information for Following Questions