Question

According to the National Association of Theater Owners, the average price for a movie in the United States in 2012 was $ 7.96. Assume the population standard deviation is $ 0.50 and that a sample of 30 theaters was randomly selected.
a. Calculate the standard error of the mean.
b. What is the probability that the sample mean will be less than $ 7.75?
c. What is the probability that the sample mean will be less than $ 8.10?
d. What is the probability that the sample mean will be more than $ 8.20?


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  • CreatedJuly 17, 2015
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