According to the Department of Transportation, the average licensed driver travels 1,123 miles per month in his or her vehicle. Assume the population standard deviation is 341 miles per month. Determine the interval that will contain 95% of the sample means for a sample size of

a. 30 drivers

b. 45 drivers

c. 60 drivers

d. Explain the differences in these probabilities.

AppendixLO1