Standard error calculation

Reference no: EM1394172

1. The mean television viewing time for teens is 3 hours per day. Assume the population mean is 3 and the population standard deviation is known to be 1.2 hours. Suppose a sample of 50 teens will be used to monitor television viewing time.

a) What is the standard error of the sampling mean?

b) What is the probability the sampling mean will be within +/- 0.25 hours of the population mean?

Reference no: EM1394172

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