221 million computer and video games were sold in 2002- nearly two games for every u.s. household. sixty percent of Americans age 6 or older/ about 145 million people play computer and video games. the average age of players is 28.
suppose it is possible to ssume the standard deviation of ages of video game users is 9 years and the distribution is bell shaped. to assist the marketing department in obtaining demographics to increase sales determine the proportion of players who are.
a. between 19 and 28
b. between 28 and 37
c. older then 37