2 1. Data preparation-integration a. The difference in variables is that chest_pain in heart-h is cp in heart-c. Since they both stand for the same variable and all variables are in the same order, the line of variables in heart-c were removed when the datasets were merged into heart-ch.txt b. 597 rows excluding variable row. 14 variables. 2. Descriptive data summarization a. Mean: 51.15. Std Deviation: 9.083. Min: 28. M