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.
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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Subject
Statistics