Statistical Analysis and Sample Size Calculations for Experimental Research Design

This assignment provides a step-by-step guide to statistical analysis and sample size determination in research design.

Michael Davis
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Statistical Analysis and Sample Size Calculations for Experimental Research Design
1. Calculate the sample size needed 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
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. Present an argument that your study is worth doing
with the smaller sample.
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Statistics

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