Help with D

The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). . . . A. Ille vallaUit WEGNy UIe SPEIll WALLIIIIly WIEVISIUTI IS likely Skeweu TyILL, TIULTImany UISUIVItu. O B. The variable "weekly time spent watching television" is likely normally distributed. O C. The variable "weekly time spent watching television" is likely symmetric, but not normally distributed. O D. The variable "weekly time spent watching television" is likely skewed left, not normally distributed. O E. The variable "weekly time spent watching television" is likely uniform, not normally distributed. (b) According to a certain survey, adults spend 2.35 hours per day watching television on a weekday. Assume that the standard deviation for "time spent watching television on a weekday" is 1.93 hours. If a random sample of 60 adults is obtained, describe the sampling distribution of x, the mean amount of time spent watching television on a weekday. x is approximately normal with u- = 2.35 and o; = 0.249162. (Round to six decimal places as needed.) (c) Determine the probability that a random sample of 60 adults results in a mean time watching television on a weekday of between 2 and 3 hours. The probability is 0.9155 . (Round to four decimal places as needed.) O (d) One consequence of the popularity of the Internet is that it is thought to reduce television watching. Suppose that a random sample of 55 individuals who consider themselves to be avid Internet users results in a mean time of 2.01 hours watching television on a weekday. Determine the likelihood of obtaining a sample mean of 2.01 hours or less from a population whose mean is presumed to be 2.35 hours. The likelihood is .(Round to four decimal places as needed.)