Question: As mentioned in Exercise 7 39 according to the American Time

As mentioned in Exercise 7.39, according to the American Time Use Survey, Americans watch television each weekday for an average of 151 minutes (Time, July 11, 2011). Suppose that the current distribution of times spent watching television every weekday by all Americans has a mean of 151 minutes and a standard deviation of 20 minutes. Find the probability that the average time spent watching television on a weekday by 200 randomly selected Americans is
a. 148.70 to 150 minutes
b. More than 153 minutes
c. At most 146 minutes

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