Lothar Sachs (1984, Applied Statistics (a book, not the journal), Section 4.3.3, p. 322-329) says that a rule of thumb for testing normality is to divide the median by the mean, and if the ratio is between 0.9 and 1.1, the distribution is approximately normally distributed. This is actually a measure of the skewness.
He continues to present a test for normality based on the range divided by the standard deviation developed by Pearson and Stephens (Biometrika, v. 51, 1964, p. 484-487). As he notes, this is actually a test of the homogeneity of the variances. Does anyone know of a formal test for normality employing the mean and median, i.e. the central tendency instead of the dispersion? Thanks. Bob 251026473393872 . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
