On Sat, 14 Feb 2004 12:16:13 +0800, "Erica So" <[EMAIL PROTECTED]> wrote:
> Dear all, > > One of the requirement on conducting Chi-Square test of association is 'no > more than 20% of the expected values should be less than five', however, all > of my data are less than 1. Is there any other association coefficient allow > expected values less than 1 in SPSS? > I've seen that happen with tests that are used for checking whether a Pseudo-Random Number Generator (that is, computer algorithm) is really working. What I remember reading about it, is that for *that* application, the chisquared test is considered useful, despite the rule-of-thumb. Even for that, I think I would look at both tests that SPSS provides, the Pearson and the Likelihood chisquared. For anything other than that, I would be suspicious, and I would try to convert the problem. (Do they have to be categories? Can't there be fewer categories?) For some problems that I can imagine, you could make statements about exact probabilities -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html "Taxes are the price we pay for civilization." . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
