These 748 donor data, each one
included R (Recency-months since last donation), F
(Frequency-total number of donation), M (Monetary -
total blood donated in c.c.), T (Time-months since first
donation) and a binary variable representing whether
he/she donated blood in March 2007 (1 stand for
donating blood; 0 stands for not donating blood). The
people who have donated blood in 2007 accounts for
only 24% in the dataset. There is an imbalance in both
the blood donated in 2007 and also found in the
extended nominal class of regular voluntary donor. It
must be noted that the extended nominal class of the
regular voluntary donor has been extended based on the
current dataset, it factors not just the blood donation in
2007 but also the other attributes