On weeknights, the average number of hours of sleep per night adults 5584 years of age get

Question:

On weeknights, the average number of hours of sleep per night adults 55–84 years of age get is 7.0. Assume this random variable follows a normal distribution with a standard deviation of 1.1 hours.

a. What is the probability that a randomly selected adult from this age group will get

1. More than 6.0 hours of sleep tonight?

2. Less than 5.0 hours of sleep tonight?

3. Between 6.3 and 8.0 hours of sleep tonight?

4. Between 5.6 and 6.5 hours of sleep tonight?

b. Use Excel or PHStat to confirm the answers in part a.

c. How many hours of sleep will an adult in this age group get if they are in the 35th percentile?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...