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(2) A Priori Power Analysis Download the G*Power software provided, and then use the software to submit the following: a. Calculate the estimated sample size
(2) A Priori Power Analysis
Download the G*Power software provided, and then use the software to submit the following: a. Calculate the estimated sample size needed when given these factors:
- one-tailed t-test with two independent groups of equal size
- small effect size (see Piasta, S.B., & Justice, L.M., 2010)
- alpha =.05
- beta = .2 (Reminder: Power = 1 - beta)
- 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 half the size.
- Indicate the resulting alpha and beta.
- Analyze the result and decide if the study should be conducted with a smaller sample size. Explain your rationale.
- In the context of Type I and Type II error.
- Include a visual of the G* Power output matrix.
b. Calculate the estimated sample size needed to perform an ANOVA (fixed effects, omnibus, one-way) when given these factors:
- ANOVA (fixed effects, omnibus, one-way)
- small effect size
- alpha =.05
- beta = .2
- 3 groups
- Include a visual of the G* Power output matrix.
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