One consequence of the popularity of the internet is that it is thought to reduce television watching. suppose that a random sample of 4545 individuals who consider themselves to be avid internet users results in a mean time of 2.082.08 hours watching television on a weekday. determine the likelihood of obtaining a sample mean of 2.082.08 hours or less from a population whose mean is presumed to be 2.452.45 hours.

Assume that females have pulse rates that are normally distributed with a mean of mu equals 72.0 beats per minute and a standard deviation of sigma equals 12.5 beats per minute. complete parts (a) through (c) below. a. if 1 adult female is randomly selected, find the probability that her pulse rate is between 65 beats per minute and 79 beats per minute. the probability is? b. if 16 adult females are randomly selected, find the probability that they have pulse rates with a mean between 65 beats per minute and 79 beats per minute. the probability is? c. why can the normal distribution be used in part (b), even though the sample size does not exceed 30?