You may need to use the appropriateappendix tableortechnologyto answer this question.

The estimated daily living costs for an executive traveling to various major cities follow. The estimates include a single room at afour-star hotel,beverages, breakfast, taxi fares, and incidental costs.

CityDaily Living

Cost ($)City 1242.87City 2260.93City 3194.19City 4260.66City 5355.36City 6346.22City 7165.37City 8250.08City 9326.76City 10283.56CityDaily Living

Cost ($)City 11212.00City 12284.08City 13139.16City 14436.72City 15240.87City 16310.41City 17223.73City 18181.25City 19238.20City 20250.61

(a)

Compute the sample mean (in dollars). (Round your answer to the nearest cent.)

$

(b)

Compute the sample standard deviation (in dollars). (Round your answer to the nearest cent.)

$

(c)

Compute a 95% confidence interval (in dollars) for the population standard deviation. (Round your answers to the nearest cent.)

$to $