Standard deviation of the resulting distribution

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According to the neilson company, the population mean number of hours of tv viewing per household per week in the us is 50.4 with a standard deviation of 11.8 hours. a random sample of 42 u.s household is taken for study.

a. What is the shape mean and standard deviation of the resulting distribution of the sample mean?

b. What is the probability that the mean of the sample of 42 is more than 52 hours?

c. What is the probability that a randomly selected household in the population watched more than 52 hours of tv in a week?

Reference no: EM1394569

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