Warren County Telephone Company claims in its annual report that the typical customer
Chapter 0, Problem 43(choose chapter or problem)
Warren County Telephone Company claims in its annual report that the typical customer spends $60 per month on local and long-distance service. A sample of 12 subscribers revealed the following amounts spent last month. $64 $66 $64 $66 $59 $62 $67 $61 $64 $58 $54 $66 a. What is the point estimate of the population mean? b. Develop a 90 percent confidence interval for the population mean. c. Is the companys claim that the typical customer spends $60 per month reasonable? Justify your answer
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