Describe Probability using Z - score
describe the mean television viewing time for Americans is 15 hours per week (Money November 2003). Supposing a sample of 60 Americans is taken to further investigate viewing habits. Presume the population standard deviation for weekly viewing time is Q = 4 hours.
1) describe what is the probability the sample mean within 1 hour with of the population mean?
2) describe what is the probability the sample mean will be within 45 minutes of the population mean?