Unformatted text preview: b) Sketch the distributions involved, showing the area for alpha, beta, and power. c) How large would her sample size need to be in order to achieve a power level of .8? 2. In a planned study involving a standard test, the population is known to have a mean of 500 and a standard deviation of 100. The researchers predict that their planned experimental procedure will produce a large effect. What is the predicted mean of the population that will be given the experimental procedure? 3.In a completed study, there is a known population with a normal distribution, µ = 25 and σ =12. What is the estimated effect size if a sample given an experimental procedure has a mean of (a) 19, (b) 22, (c) 35? Also indicate whether the effect is approximately small, medium, or large....
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This note was uploaded on 04/26/2008 for the course PSYC 210 taught by Professor Chow during the Spring '08 term at UNC.
- Spring '08