Power Calculation, Several Means, ANOVA, 1-Way

Power calculation for 1-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 Groups Number of groups in the analysis (acceptable range 2 to 1000).
RMSSE Root mean square standardized effect, a measure of the overall size of the standardized effects in the model.
Alpha Level Alpha level (Type I error rate for the overall F test) (acceptable range 0.0001 to 0.25).
Model Type Model type selection:

 Fixed Effects model restricts you to make inferences about the actual treatments included in the experiment;

 Random Effects assumes you have randomly sampled treatment levels from a larger population of possible treatments.
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).