Power Calculation, Several Means, ANOVA, 2-Way

Power calculation for 2-way ANOVA with option for charts of power vs. sample size, power vs. RMSSE size and, power vs. alpha level

General

Element Name Description
Group Sample Size The number of samples in each group, assuming all group sizes are equal (acceptable range 2 to 150000).
Number of Row Levels Number of levels of the row effect (acceptable range 2 to 1000).
Number of Column Levels Number of levels of the column effect (acceptable range 2 to 1000).
Row RMSSE Row effect root mean square standardized effect.
Column RMSSE Column effect root mean square standardized effect.
Interaction RMSSE Row and column interaction effect root mean square standardized effect.
Alpha Level Alpha level (Type I error rate for the overall F test) (acceptable range 0.0001 to 0.25).
Detail of computed results reported Output level of detail selection:

 Power Calculation produces Power Calculation spreadsheet;

 Pwr Calc plus Charts option produces, in addition, Power vs. Sample Size chart, Power vs. RMSSE, and Power vs. Alpha Level charts.

Chart Parameters

Element Name Description
Number of Steps. (For charts only) Number of individual steps for which to calculate power between the starting and ending parameter values for Power Charts (Min 4, Max 100).
Starting Sample Size. (For charts only) Initial sample size for calculation of Power vs. Sample Size chart (acceptable range 2 to 140,000).
Ending Sample Size. (For charts only) Final sample size for calculation of Power vs. Sample Size chart (acceptable range 5 to 150,000).
Starting RMSSE. (For charts only) Initial RMS standardized effect size for calculation of Power vs. RMSSE chart (acceptable range 0.01 to 9).
Ending RMSSE. (For charts only) Final RMS standardized effect size for calculation of Power vs. RMSSE chart (acceptable range 0.02 to 10).
Starting Alpha Level. (For charts only) Initial alpha level for calculation of Power vs. Alpha Level chart (acceptable range 0.0001 to 0.2499).
Ending Alpha Level. (For charts only) Final alpha level for calculation of Power vs. Alpha Level chart (acceptable range 0.0002 to 0.25).