A cat-rental company is interested in the amount of time its vehicles are out of operation for repair work. State all assumptions and find a 90%% confidence intenial for the mean number a 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 day's that each had been inoperative. 24 11 15 47 10 5 14 18 12 22 0 State all assumptions Select all the assumptions below W A. The sample size is at least 30 1. The variance Is less than the main C. in a random sample I DE The sample comes from a normal population Find a 20% Ensidence meeval for the population mean The 5075 confidence nienal is bors's lower limit of to in upper line of