Reply #50: Well, it explains that N is

[Febble]

the number of those voters who were non-responders (who were either not asked or refused to answer the exit polls)

But this is not ESI's definition of "non-responders".

Let:
C be voters who completed an exit poll interview
R be voters who are selected for interview but who refuse to participate
M be voters who are selected for interview but are not approached as the interviewer is busy.
E be Everyone Else (people who were not selected for interview at all, i.e. the majority in all but fairly small precincts).

C = K+B (as defined by Ron)

Ron's definition of N = R+M+E.
ESI's definition of N = R+M.

That E makes a large difference.


Edit: As I have posted on the my other responses, Ron appears to believe that the mean of C+N is around 63 (C=30, N=32.8). If so, N cannot possible = R+M+E. It must = R+M. But in that case the formula does not give Kerry's vote share as stated, but his share of the selected voters. There is a very large missing E.