The mean television viewing time for Americans is 15 hours per week (Money, November 2003). Suppose a sample of 60 Americans is taken to further investigate viewing habits. Assume the population standard deviation for weekly viewing time is 4 hours.
a. Determine the probability the sample mean will be within 1 hour of the population mean.
b. Determine the probability the sample mean will be within 45 minutes of the population mean.
The solution is comprised of detailed solution on calculating the probability of a normal distribution.