Warren County Telephone Company claims in its annual report that the typical customer spends $62 per month on local and long-distance service. A sample of 12 subscribers revealed the following amounts spent last month.

$63

$67

$64

$68

$58

$64

$69

$61

$65

$66

$53

$65

a.	What is the point estimate of the population mean?(Round your answer to 3 decimal places.)

Estimated population mean

$

b.	Develop a 90% confidence interval for the population mean. (Use t Distribution Table.)(Round your answers to 3 decimal places.)

Confidence interval for the population mean

$and $

c.	Is the company's claim that the "typical customer" spends $62 per month reasonable?
	Yes No