Question: Reconsider Problem 2.9. Using the data on the Clean Data worksheet tab, partition the historical records into a training partition (60 percent of the records)

Reconsider Problem 2.9. Using the data on the Clean Data worksheet tab, partition the historical records into a training partition (60 percent of the records) and a validation partition (the remaining 40 percent of the records).

a. Searching over values of k from 1 to 9, find the best value for k in the KNN algorithm when it is used to classify applicants from the validation partition as likely to graduate (or not).

b. Using the best value for k determined in part a, determine the accuracy, sensitivity, and specificity for the algorithm.

c. Using the best value for k determined in part a, generate the lift chart for the algorithm.

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