Power Analysis for ANOVA Designs

This form runs a SAS program that calculates power or sample size needed to attain a given power for one effect in a factorial ANOVA design. The program is based on specifying Effect Size in terms of the range of treatment means, and calculating the minimum power, or maximum required sample size.

Help Me With:

• What is Power?
• Specifying Effect Size
• Factorial Designs
• Frequently asked questions about power analysis

Power Form

• Number of levels (a) of effect 'A'
• Total number of levels (b) of all other factors crossed with effect 'A'.
• Error level (alpha) for which you want power or sample size calculated
• Effect size(s) for which you want power or sample size calculated
• Output: Power table Sample-size table

&

Other power analysis links

• Power and Sample Size A variety of power calculators from HyLown Consulting LLC
• Sample size calculators A variety of sample size calculators, largely for clinical research, from UCSF
• Russ Lenth's power and sample-size page A Java application that performs interactive power analysis for a wide variety of designs. Select, e.g., Balanced ANOVA from the pull-down list, then enter the design in the pop-up windown. Once you've specified the design, you can control various parameters using sliders.