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What is the purpose of a post hoc power analysis?
What is the purpose of a post hoc power analysis?
- To establish the sample size required for a study
- To estimate power after analyzing the data (correct)
- To calculate sensitivity after data collection
- To determine the effect size before data collection
When conducting a sensitivity analysis, what is the goal?
When conducting a sensitivity analysis, what is the goal?
- To determine the sample size needed for a study
- To evaluate the statistical power of the study
- To find the expected effect size
- To identify the minimum detectable effect size (correct)
In Setting Power Exp. 1, what was the effect size that could be detected with a power of 0.80?
In Setting Power Exp. 1, what was the effect size that could be detected with a power of 0.80?
- dz = 0.317 (correct)
- dz = 0.430
- dz = 0.48
- dz = 0.80
What role does alpha play in determining statistical power?
What role does alpha play in determining statistical power?
Why is post hoc power analysis conducted after data analysis?
Why is post hoc power analysis conducted after data analysis?
What does the observed effect size of dz = 0.430 represent in Setting Power Exp. 2?
What does the observed effect size of dz = 0.430 represent in Setting Power Exp. 2?
How does changing (1 - beta) impact sensitivity in sensitivity analysis?
How does changing (1 - beta) impact sensitivity in sensitivity analysis?
What is the primary purpose of an a priori power analysis?
What is the primary purpose of an a priori power analysis?
Why is understanding statistical power important in research studies?
Why is understanding statistical power important in research studies?
What does setting power at 0.80 indicate about a study in terms of sensitivity?
What does setting power at 0.80 indicate about a study in terms of sensitivity?
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