minutes per day. In addition, a particular American state that they spend on average 65 minutes per day on Facebook. M04_MCCL3396_14_GE_C04.indd 259 29/09/2021 14:01 260 CHAPTER 4 ● Random Variables and Probability Distributions

a. If the average time that the American spends per day on Facebook is measured based on the information provided by BroadbandSearch, approximately what proportion of Americans would spend more than 65 minutes per day on average on Facebook?

b. If BoardbandSearch randomly selected a person from the population of America, what is the probability this person would spend more than 65 minutes per day on Facebook on average?

c. The population median, call it h, of a continuous random variable x is the value such that P1x Ú h2 = P1x … h2 = .5—that is, the median is the value h such that half the area under the probability distribution lies above h and half lies below it. Find the median of the random variable corresponding to the average time spent on Facebook and compare it with the mean.