2-Way ANOVA: Power Calculation Results - Quick Tab

Calculating Power

Select the Quick tab of the 2-Way ANOVA: Power Calculation Results dialog box to access options to interactively view the results of power calculations and generate plots of power as a function of quantities that affect power in practice.

X-Axis Graphing Parameters. The entries in the boxes under X-Axis Graphing Parameters establish the start value, end value, and number of steps on the X-axis for the graphs specified under Power Charts.

Start N. In the Start N box, enter the starting value of N used in the Power vs. N power chart.

End N. In the End N box, enter the final value of N used in the Power vs. N power chart.

Start RMSSE. In the Start RMSSE box, enter the starting value of RMSSE used in the Power vs. RMSSE power chart.

End RMSSE. In the End RMSSE box, enter the final value of RMSSE used in the Power vs. RMSSE power chart.

Start Alpha. In the Start Alpha box, enter the starting value of Alpha used in the Power vs. Alpha power chart.

End Alpha. In the End Alpha box, enter the final value of Alpha used in the Power vs. Alpha power chart.

No. of Steps. In the No. of Steps box, enter the number of steps, or intervals, plotted on the X-axis in the power charts specified in the Power Charts box.

Power Charts. Use the buttons under Power Charts to produce charts of power as a function of sample size, standardized effect size, or type I error rate.  The range of values plotted on the X-axis, and the number of steps plotted, are controlled by parameters in the X-Axis Graphing Parameters box. For all of the options below, separate power charts are produced for row, column, and interaction effects.

Power vs. N. Click the Power vs. N button to produce a plot of power versus sample size N.

Power vs. RMSSE. Click the Power vs. RMSSE button to produce a plot of power versus root mean square standardized effect size (RMSSE).

Power vs. Alpha. Click the Power vs. Alpha button to produce a plot of power vs.type I error rate (Alpha ).