BIAM510 Week 4 Assignment Case Study A Typical Decision Tree

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Q1. What is the business scenario being used here?

Q2. What is the target variable, its type, and permissible values?

Q3. What is the percentage distribution of the target variable values in the training data set as a whole?

Q4. Which node is the root node, and what are the percentage distributions of the target variable?

Q5. There are three boxes with a letter I, A, or V connected to the box via an arrow. What is distinctive about each of these three boxes, and what does the letter with the arrow pointing to the box signify?

Q6. What is the name of each of the three boxes referred to in the previous question?

Q7. What is the rule set for the three boxes labeled with a letter and an arrow referred to in the previous question? Make sure your answer is specific for each box.

Q8. On page 243 the authors state: “After six months, 89.3% of subscribers are still active, 4.39% have left involuntarily, and 6.32% have left “voluntarily”. What were the corresponding distributions for the training set? Why do you think they were different? What are the implications for this difference?

Q9. This organization is in a mature market, which means there are relatively few entities that do not already have a vendor supplying this product. The book says that in this type of market, organizations are concerned about churn. Why is that?