The ATO (Australian Taxation Office) is interested in estimating the mean amount of money spent on outside tax service by income tax filers filing as single on their individual form. To do this, they have selected a random sample of n = 16 people from this population and surveyed them to determine the sample mean and sample standard deviation. The distribution is assumed to be normal. The following information was observed:

Sample mean (xbar) = $88.60, sample standard deviation (s) = $30.79

Given this information, what is the 95 precent confidence interval for the mean dollars spent on outside tax assistance by taxpayers who file as single?

A.

Approximately $80.90 to $96.30

B.

Nearly $73.51 to $103.69

C.

Approximately $72.19 to $105.01

D.

Nearly $72.28 to $104.92