K An advertising executive wants to estimate the mean amount of time that consumers spend with digital media daily. From past studies, the standard deviation is estimated as 49 minutes. a. What sample size is needed if the executive wants to be 95% confident of being correct to within 4 minutes? b. If 99% confidence is desired, how many consumers need to be selected? a. A sample size of consumers is needed. (Round up to the nearest integer.)

What tamplo pian is neoded it the emaitive wais to te 95N contisent of being conect to within 14 minutes? b. 4 got confdence a desired, how many connuters need to be nelocted? 2. A armple site of conkumen is needed. Aound up to the sinateu irecer )