In an Examination of Purchasing Patterns of Shoppers,a Sample of 16

Multiple Choice

In an examination of purchasing patterns of shoppers,a sample of 16 shoppers revealed that they spent,on average,$54 per hour of shopping.Based on previous years,the population standard deviation is thought to be $21 per hour of shopping.Assuming that the amount spent per hour of shopping is normally distributed,find a 90% confidence interval for the mean amount.

A) [$45.3637,$62.6363]
B) [$47.2695,$60.7305]
C) [$51.8409,$56.1591]
D) [$52.3174,$55.6826]