# Question: A January 2010 article on money cnn com reported that the average

A January 2010 article on money.cnn.com reported that the average monthly cable bill in the United States was $75. The article also stated that the annual percentage increase in the average monthly cable bill is 5% http://money.cnn.com/2010/01/06/news/companies/cable_bill_cost_increase/index.htm). Suppose that the current distribution of all monthly cable bills in the United States is approximately normal with a mean of $82.69 and a standard deviation of $11.17. Let be the average monthly cable bill for 23 randomly selected U.S. households with cable. Find the mean and standard deviation of , and comment on the shape of its sampling distribution.

## Relevant Questions

Refer to Exercise 7.93. The package of Sylvania CFL 65-watt replacement bulbs that use only 16 watts claims that these bulbs have an average life of 8000 hours. Assume that the lives of all such bulbs have a normal ...Multiple choice questions: 1. A sampling distribution is the probability distribution of a. A population parameter b. A sample statistic c. Any random variable 2. Non-sampling errors are a. The errors that occur because the ...In a Time Magazine/Aspen Ideas Festival poll conducted by Penn Schoen Berland during June 1–8, 2011, Americans age 18 years and older were asked, “Overall, do you think the past decade has been one of progress or decline ...A survey of 500 randomly selected adult men showed that the mean time they spend per week watching sports on television is 9.75 hours with a standard deviation of 2.2 hours. Construct a 90% confidence interval for the ...A researcher wants to determine a 99% confidence interval for the mean number of hours that adults spend per week doing community service. How large a sample should the researcher select so that the estimate is within 1.2 ...Post your question