The mean television viewing for americans is 15 hour per

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The mean television viewing for americans is 15 hour per week (Monday, November 2003). Suppose a sample of 80 Americans is taken to further investigate viewing habbits. Assume the population standard deviation for weekly viewing time is StdDev=5hrs.

A.)What is the probability the sample mean will be within 1 hour of the population mean (to four decimals)?

B.)What is the probability the sample mean will be within 45 minutes of the population mean (to four decimals)?

Reference no: EM13615221

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