1. The Simcoe County Food Emporium claims that "the typical customer spends $60 per visit." A sample of 12 customers revealed the following purchases, in dollars, spent the last visit:

$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% confidence interval for the population mean.

c. Is the restaurant's claim that the "typical customer" spends $60 per visit reasonable? Justify your answer.