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A random sample of 49 teenagers from a large population was surveyed, and the average number...

A random sample of 49 teenagers from a large population was surveyed, and the average number of movies that they had rented in the past week was x = 1.9, with a sample standard deviation of s = 0.5.

a) Construct a 95% confidence interval for the average number of movies rented by teenagers in a week.

b) Construct a 99% confidence interval for the average number of movies rented by teenagers in a week.

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