You sell station wagons and want to know how family size and salary influence the likelihood that a family will purchase a station wagon. You have surveyed some local families and found out whether they own a station wagon, the size of the family (Large means at least five people, Small means no more than four people), and the family’s salary (High means at least $80,000, Low means less than $80,000). The data are in the file P2_81.XLS. Analyze these data to determine how salary and family size influence the likelihood that a family will purchase a station wagon.