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According to the American Time Use Survey, adult Americans spend a mean time of 2.35 hours...

According to the American Time Use Survey, adult Americans spend a mean time of 2.35 hours a day watching television on a weekday. Assume that the standard deviation for the time spent watching television on a weekday is 1.93 hours.

a. If a sample of 40 adult Americans is obtained, describe the sampling distribution of the mean x-bar. In other words, describe the shape of the distribution, the mean of the sampling distribution, and the standard deviation of the sampling distribution.

b. What is the probability that a random sample of 40 adult Americans watch between 2 and 3 hours of television on a weekday?

Math   Statistics-And-Probability   
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