20 22.3

a. Draw a scatter plot of the data.

b. Is finding a regression line for the data reasonable? Explain your answer.

c. Determine the regression equation for the data, and draw its graph on the scatterplot you drew in part (a).

d. Describe the apparent relationship between average age and dropout rate.

e. What does the slope of the regression line represent in terms of average age and dropout rate?

f. Use the regression equation to predict the dropout rate of a university having average age of 21.

g. Identify outliers and potential influential observations.