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This program has been developed for the purpose of conducting post hoc analysis on fixed effects after an initial Analysis of Variance has been conducted and the null rejected. It has the capability to run four approaches and six procedures. This software may be used for both analysis of dispersion (utilizing Levene’s Test or Levene’s Improved Test) and central tendency.

When testing for Dispersion the Means and Variances should be calculated using the data from the Absolute Deviation from the Averages (Levene’s Test) or the Absolute Deviation from the Medians (Levene’s Improved Test). When testing for Central Tendency the Means and Variances should be calculated using the raw data.

Click here to download PHAST TM. It is free software, but the author does retain copyright. The terms of use are included in the program.

RSD and Sample Size

This spreadsheet helps you understand how the Random Sampling Distribution of the means is important in sample size calculations.  You can enter the population parameters μ (mean) and σ (standard deviation) and see what effect changing the Δ (effect size) α (Type I error) has on β (Type II error).

RSD and Sample Size

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