One hundred teenagers were recruited to participate in a study. Participants agreed to have an app installed on their mobile phones that recorded the time they spent interacting with the phone. For each person, the amount of time over the course of a week was recorded, and the results are shown in the histogram below. Intervals include the left endpoint but not the right. You can assume that the times are evenly distributed within each interval.

a)Compare the rectangle for 30-50 hours with the rectangle for 50-100 hours. Which contains a greater percentage of the teenagers? Or are they same?

b) Compare the rectangle for 30-50 hours with the rectangle for 50-100 hours. Which has higher crowding? Or are they same?

c)Which is bigger: the average time or the median time? Or are they the same?

d) What percent of the teenagers spent more than 5 hours a day (35 hours per week) interacting with their phone?

3.5 2.9 2 % per hour 0 0.5 1 1.5 2 2.5 3 3.5 0.4 0. 16 O 20 40 60 80 100 Time per week (hours)