CORRECTION:

In this paper (Hamilton, Shan, and Ziarko 1997), 
at the bottom of the fourth page and the top of the
fifth page (pp. 333-334), there is a statement that:

	In Table 4, P('Y') = 7/12 since 7 out of 12 instances
	have Y as their decision value.
	Thus, without consulting the classification, one could estimate
	the probability of an instance having decision
	value Y as 7/12  = 0.6471.

This should be amended as follows:

	In Table 4, P('Y') = 11/17 since 11 out of 17 instances
        have Y as their decision value.
        Thus, without consulting the classification, one could estimate
        the probability of an instance having decision
        value Y as 11/17  = 0.6471.

I must have had a mental blackout when I put 7/12 instead of 11/17
because I used 11/17 in all my calculations (11/17 really is 0.6471
but 7/12 certainly isn't!)