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Re: st: Fligner-Killeen
Nick's suggestion is the Brown-Forsythe modification of Levene's test
for equality of variance.
Steve
Brown, M.B. and Forsythe, A.B. (1974), "Robust Tests for Equality of
Variances," Journal of the American Statistical Association, 69, 364
-367.
Levene, H. (1960), "Robust Tests for the Equality of Variance," in
Contributions to Probability and Statistics, ed. I. Olkin, Palo Alto,
CA: Stanford University Press, 278 -292.
On Jan 16, 2007, at 9:49 AM, n j cox wrote:
More positively, a recipe for testing differences in
scale is this:
1. Compute absolute deviations =
| values - favourite group summary (e.g. median)|.
2. Apply favourite test of location to absolute deviations.
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