Last Saturday at ONYX Health Club 24/7 in Northfield, Ohio, 15 individuals were selected and the number of sit-ups that each could complete was recorded. The results are listed below.. (27, 12, 18, 5, 16, 25, 30, 13, 35, 10, 1, 13, 33, 24, 22) (a) Find the point estimate of the population mean number of sit-ups. (Round your answer to 3 decimals.) Number (b) Calculate the margin of error. (Round your answer to 3 decimals.) Number (c) Calculate the 95 percent confidence interval of the population mean number of sit-ups. (Round each value to 3 decimals.) Number Number