Statistical Analysis: Focusing on Why Kalamazoo College Alumni Donate Different Amounts of Money
My Senior Individualized Project was a statistical analysis of the data stored in Kalamazoo College's Development Office database, which contained information on alumni donors who have made contributions to the annual fund in the last five completed campaigns or fiscal years. The major emphasis of this project was to determine which variables in the Development Office's database influenced the amount of dollars donated by alumni donors in a given year. Specifically, this project tried to determine which variables had a significant influence on the amount of dollars donated, when testing alumni donors in four specific age groups: (1) 35 years or younger, (2) 31-40 years old (3) 41-50 years old, and (4) 51-60 years, and (5) 61 years or older. In addition, this project tried to determine the relative influence of each variable tested on the amount of dollars donated in a specific year. The results indicated, that the amount of dollars donated by alumni donors in a given year was dependent on several of the variables stored in the Development Office's database. Overall, the major variable that had the strongest influence on TOTAL$(yr) was alumni donors lifetime total of dollars donated to Kalamazoo College (LIFEyr). For alumni 31-40 years, old AGE and LIFE(yr) were the major variables that influenced the amount of dollars donated by alumni donors in a given year. The results also indicated that there are several variables that TOTAL$(yr) was dependent on, but their relative influence on TOTAL$(yr) when trying to explain the variability observed in TOTAL$(yr) were relatively insignificant. The results overall with the exception of Age (only when testing alumni 31-40 years old) and LIFE(yr) the variables in the data could not really be used to target new alumni donors. Finally, the results indicated that there are several variables that need to be included in the multiple regression models, in order to explain why alumni donors donate different amounts of money. Most noticeably, the number of years each alumni donor had donated to K-college (time) an and the intangible factors like an alumni donors goodwill towards KCollege must somehow be incorporated into the multiple regression models. Also, the data from the Development Office's data base has a significant amount of missing information on alumni donors over the age of 35.