confidence interval for the population mean is between?

An important factor in selling a residential property is the number of people who look through the home. A sample of 11 homes recently sold in the Halifax, Nova Scotia, area revealed the mean number looking through each home was 17 and the standard deviation of the sample was 3 people. Develop a 90% confidence interval for the population mean. (Round the final answers to 2 decimal places.) Confidence interval for the population mean is between and