Answer the following.

A car-rental company is interested in the amount of time its vehicles are out of operation for repair work. State all assumptions and find a 98% confidence interval for the mean number of days in a year that all vehicles in the company's fleet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative. 25 11 15 8 17 30 21 5 12 10 State all assumptions. Select all the assumptions below. A. The sample comes from a normal population OB. The sample size is at least 30 O) C. The variance is less than the mean O D. It is a random sample Find a 98% confidence interval for the population mean. The 98% confidence interval is from a lower limit of to an upper limit of (Round to two decimal places as needed.)