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

**General**

**Power Goal**. Power goal to use in the sample size calculation (acceptable range 0.65 to 0.999).

**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:

Sample Size Calculation produces Sample Size Calculation Spreadsheet;

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

**Chart Parameters**

**Number of Steps**. (For charts only). Number of individual steps for which to calculate sample size between the starting and ending parameter values for Sample Size Charts (Min 4, Max 100).

**Starting Power**. (For charts only). Initial power value for calculation of Sample Size vs. Power chart (acceptable range 0.05 to 0.99).

**Ending Power**. (For charts only). Final power value for calculation of Sample Size vs. Power chart (acceptable range 0.10 to 0.999).

**Starting RMSSE**. (For charts only). Initial RMS standardized effect size for calculation of Sample Size vs. RMSSE chart (acceptable range 0.01 to 9).

**Ending RMSSE**. (For charts only). Final RMS standardized effect size for calculation of Sample Size vs. RMSSE chart (acceptable range 0.02 to 10).

**Starting Alpha Level**. (For charts only). Initial alpha level for calculation of Sample Size vs. Alpha Level chart (acceptable range 0.0001 to 0.2499).

**Ending Alpha Level**. (For charts only). Final alpha level for calculation of Sample Size vs. Alpha Level chart (acceptable range 0.0002 to 0.25).