Consider the data in the file P2_60.XLS. In particular, columns B-D contain the following information about a sample of Bloomington residents: education level (completed high school only or completed college), income level (low or high), and whether the last purchased car was financed.

a. Using the data in columns B—D, determine how education and income influence the likelihood that a family finances a car.

b. Column A of this file contains the exact salaries of these Bloomington residents. Using categories of length $10,000, construct a histogram of these salaries. (You can experiment with the appropriate leftmost and rightmost categories.) Does the histogram appear to be bell shaped?