The distribution of the number of hours of sleep people get per night is bell shaped with a mean of six hours in standard deviation of 1.5 hours 1. Approximately what percent of people sleep between 6 and 7.5 hours per night?
a. 16%
b. 24%
c. 34%
d. 68%
2. If Aaron had a Z score of 1.2 how many hours did he sleep?
a. 7.5 hours
b. 7.8 hours
c. 8.0 hours
d. 8.2 hours