You are interested in the average cell phone bill for US customers. You select a random sample of 61 households and find the average monthly cell phone bill is $174.95. You calculate the sample standard deviation is $41.40.

1. A. Estimate the average monthly internet access fee based your data using formulas. Show any formulas needed, show all work and use proper units. Remember that ALL estimates should include an appropriate interpretation!

B. Estimate the average monthly internet access fee using StatCrunch. Compare your answers to A and B.

Use StatCrunch instructions from Recitaiton 5A to Import this Excel Data Set into StatCrunch. Then use STAT/T-STATS/WITH DATA and take it from there.

5. Use StatCrunch to calculate a 95% CI for the total U.S. revenue for movies in 2005 during this particular year. Interpret your results.

7.According to yoexpert.com, the average budget for a U.S. movie now is approximately $139 million. What is your best estimate (use a CI) of the budget of a U.S. movie for 2005, and is the average budget now higher, lower, or about the same compared to 2005? Use your CI to decide.