III. Computation (points per item vary). You may use your calculator or spreadsheet software. For items

26. (10 points) A company that sells posters of cartoons from the 1980s and 1990s is marketing a new series of posters. They do a new mailing to 5,000 of their customers to evaluate who is most likely to buy the new poster series. It costs $0.25 to mail the promotion to each customer and the expected contribution from each customer is approximately $10 (revenue from each customer is approximately $15). They then ran a decision tree analyses (the output is listed below):

How many terminal nodes are there?

What is the best predictor of buying overall?

Describe one interaction in the analysis.