Question: A survey is being conducted by KINT Univsion TV to find out how much time Maquila company executives spend watching television. A previous survey showed that the average viewing time per week was 9 hours with a S. D. of 3 hours. If the owner of KINT wants the estimate to be within one quarter of an hour of the viewing time, how many executives should be surveyed if a 99% level of confidence is desired?