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Power Example: A researcher is examining a treatment effect. The population has the following properties: μ=...

Power Example: A researcher is examining a treatment effect. The population has the following properties: μ= 74, with s= 15. He expects a treatment effect of 5. To test this effect he has a sample of 25 participants and tests the effect at the .05 level. What is the power of the test?

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Answer #1

Using minitab

stat -> power and sample size -> 1-sample t

power = 0.359655

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