The breast cancer data set breast-cancer-wisconsin.data.txt from

http://archive.ics.uci.edu/ml/machinelearningdatabases/breastcancerwisconsin/ (description at http://archive.ics.uci.edu/ml/datasets/Breast+Cancer+Wisconsin+%28Original%29 ) has missing values.

1. Use the mean/mode imputation method to impute values for the missing data.
2. Use regression to impute values for the missing data.
3. Use regression with perturbation to impute values for the missing data.
4. (Optional) Compare the results and quality of classification models (e.g., SVM, KNN) build using
   • the data sets from questions 1,2,3;
   • the data that remains after data points with missing values are removed; and (3) the data set when a binary variable is introduced to indicate missing values.

Question 15.1

Describe a situation or problem from your job, everyday life, current events, etc., for which optimization would be appropriate. What data would you need?