A simple random sample of 89 two year old Toyota Pruis cars that are listed for sale was collected from www.cars.com. The advertised prices of the cars are summarized in the table below.
Price in dollars Frequency
15,000-17,499 1
17,500-19,999 2
20,000-22,499 4
22,500-24,999 27
25,000-27,499 38
27,500-29,999 15
30,000-32,499 0
32,500-34,999 2

Find the approximate mean and standard deviation for the advertised price of the cars. Round to the nearest hundredth.