Below are the data collected from two random samples of 500 american adults on the number of hours they work per day (rounded to the nearest hour): number of hours of work per day 6 7 8 9 10 sample a: number of adults 60 90 145 150 55 sample b: number of adults 70 80 140 145 65 ryan concludes that adults spend a mean of 8 hours working each day. malia thinks the mean is 9 hours. who is correct—ryan or malia? explain your answer in two or three sentences. make sure to use facts to support your answer.