Exercise 9-38 (Algo) (LO9-2) An Important factor in selling a residential property is the number of times real estate agents show a home. A sample of 20 homes recently sold in the Buffalo, New York, area revealed the mean number of times a home was shown was 18 and the standard deviation of the sample was 7. a. What is the margin of error for a 98% confidence interval? (Round your answers to 3 decimal places.) Margin of enor b. What is the 98% confidence interval for the population mean? (Use Distribution Table) (Round your answers to 2 decimal places.) Condidence interval for the population mean is between and