This article evaluates power and Type I error probabilities for a modified Fisher exact test for homogeneity of response probabilities in 2 x 2 tables. The continuity-corrected Fisher statistic is more powerful than the uncorrected Fisher exact test, while it is less often nonconservatively biased than the Pearson chi-square. (Author/RD)

Several robust absolute deviation statistics have been developed recently. Two such correlation coefficients are developed and discussed, one for ranked data and another for interval level data. The standard error and range of the coefficients are given. The algebraic relationship between the coefficients and three widely used correlation…

Kelly's formula estimates sampling variance of correlation corrected for attenuation by using split-half reliabilities. In some cases, coefficient alpha estimate of reliability is preferable. A simulation study suggests a variation of Kelly's formula can be used appropriately with coefficient alpha. Kelly's formula is modified to accept…

The normalized mean is developed and discussed as a descriptive measure of central location. The advantages of the normalized mean over the arithmetic mean, median, and trimmed mean are discussed. (Author)

Data for four-, five-, and seven-position Likert formats from 292 undergraduates showed systematic error varied among formats, i.e., central tendency errors tended to increase with increasing number of categories and to reduce variances expected. (Author)