The following figures display data that depict the relation between students’ monthly cell phone bills and the number of hours they report that they study per week.

a. What does the accompanying scatterplot suggest about the shape of the distribution for hours studied per week? What does it suggest about the shape of the distribution for a monthly cell phone bill?

b. What does the accompanying grouped frequency histogram suggest about the shape of the distribution for a monthly cell phone bill?

c. Is it a good idea to use a parametric hypothesis test for these data? Explain.