Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 75weekly reports showed a sample mean of 17.5customer contacts per week. The sample standard deviation was 5.3. Provide 90%and 95%confidence intervals for the population mean number of weekly customer contacts for the sales personnel.

90%confidence interval, to 2 decimals:

95%confidence interval, to 2 decimals: