In the July 29, 2001, issue of the Journal News (Hamilton, Ohio), Lynn Elber of the Associated Press reported that “while 40 percent of American families own a television set with a V- chip installed to block designated programs with sex and violence, only 17 percent of those parents use the device.” 4
a. Use the report’s results to find an estimate of the probability that a randomly selected American family has used a V- chip to block programs containing sex and violence.
b. According to the report, more than 50 percent of parents have used the TV rating system (TV- 14, etc.) to control their children’s TV viewing. How does this compare to the percentage using the V- chip?