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Download the G*Power software provided and then use the software to submit the following (http://www.gpower.de/) 1. Calculate the sample size needed...

Download the G*Power software provided and then use the software to submit the following (http://www.gpower.hhu.de/)

1. Calculate the sample size needed given these factors:

  • ANOVA (fixed effects, omnibus, one-way)
  • small effect size
  • alpha =.05
  • beta = .2
  • 3 groups
  • Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample approximately half the size. Give your rationale for your selected beta/alpha ratio. Indicate the resulting alpha and beta. Give an argument that your study is worth doing with the smaller sample.

In a few sentences, describe the designs that can address your research question. The designs must involve two different statistical analyses. For each design, specify and justify each of the four factors and calculate the estimated sample size you'll need. Give reasons for any parameters you need to specify for G*Power.


I do not plan to submit this as my own work.

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