Disney's Hannah Montana: The Movie opened on Easter weekend in April 2009. Over the three-day weekend, the movie became the number-one box office attraction (The Wall Street Journal, April 13, 2009). The ticket sales revenue in dollars for a sample of 25 theaters is as follows.

a. What is the 95% confidence interval estimate for the mean ticket sales revenue per theater? Interpret this result.
b. Using the movie ticket price of $7.16 per ticket, what is the estimate of the mean number of customers per theater?
c. The movie was shown in 3118 theaters. Estimate the total number of customers who saw Hannah Montana: The Movie and the total box office ticket sales for the three-day weekend.

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20,200 8350 10,750 13,900 13,185 10,150 7300 11,320 14,000 12,700 6750 21,400 9700 11,200 13,500 9330 10,800 4200 9200 1 7430 6700 11,380