The Future-Vision Company is considering applying for a franchise to market satellite television dish systems in a Florida market area. As part of the company’s research into this opportunity, staff in the new acquisitions department conducted a survey of 548 homes selected at random in the market area. They asked a number of questions on the survey. The data for some of the variables are in a file called Future-

Vision. One key question asked whether the household was currently connected to cable TV.

a. Using the sample information, what is the 95%

confidence interval estimate for the true proportion of households in the market area that subscribe to cable television?

b. Based on the sample data, develop a 95%

confidence interval estimate for the mean income and interpret this estimate.