Figure 1. The variables in the SDC database.
Sale ID # (generated by the database)
Date
Time of Day
Day of Week
Location
Type sold (pink or regular)
Price per unit
Units sold per customer
Sale amount
Total daily sales amount
Salesperson
Stand type (one is painted yellow; the other red)
Temperature
Weather condition (sunny, cloudy, foggy, drizzle, rain)
Customer transportation type (foot, bike, car, rollerblades, misc.)
Customer age range (1 - 5; 6 - 10; 11 - 15; 16 - 20; 21 - 30;
31 - 40; over 40)
Customer zip code (yes, they were cheeky enough to ask)
Customer zip code extension
Customer return flag (y or n)
Advance signs flag (y or n - signs on roadway in advance of stand)
Promotion Type (none, 10 cents off, free cup, licorice gift)
Coupon flyer type (None, rich, comfortable, or broke - the kids put
coupons in mailboxes according to their
perception of the homeownees wealth)