The amount of television viewed by todayʹs youth is of primary concern to Parents Against Watching Television (PAWT). 300 parents of elementary school-aged children were asked to
Estimate the number of hours per week that their child watches television. The mean and the
Standard deviation for their responses were 19 and 2, respectively. PAWT constructed a
Stem-and-leaf display for the data that showed that the distribution of times was a symmetric,
Mound-shaped distribution. Give an interval where you believe approximately 95% of the
Television viewing times fell in the distribution.
A)between 13 and 25 hours per week
B)less than 17 and more than 21 hours per week
C)less than 23
D)between 15 and 23 hours per week

Question

Quizplus · Accepted Answer

The empirical rule states that for a normal distribution, approximately 95% of the data falls within two standard deviations of the mean. In this case, the mean is 19 and the standard deviation is 2, so 95% of the data falls between 19 - 2(2) = 15 and 19 + 2(2) = 23 hours per week.

The Amount of Television Viewed by Todayʹs Youth Is of Primary