Consider the process of planning for adequate power when designing an experiment for which a two-sample t
Question:
(a) Suppose the effect size is constant and the chosen alpha level is also constant (a) (e.g., at 0.05). If the sample sizes for the two groups go up from 12 to 18, how does this affect power? That is, does power go down, stay the same, or go up? Why? How is this related to the standard error?
(b) The graph below shows two normally distributed populations. Calculate the effect size here.
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Related Book For
Statistics For The Life Sciences
ISBN: 9780321989581
5th Edition
Authors: Myra Samuels, Jeffrey Witmer, Andrew Schaffner
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