Statistical Power - People.stat.sfu.ca

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PPA: Conducted before the experiment is carried out.! Goal: to improve research design to increase the probability of detecting biologically significant effects.! ! • Determine the probability that an effect size of interest will be detected with a given sample size.! • Determine the sample size necessary to achieve acceptably high power.! ! ! Prospective Power Analysis (PPA)
• Set a meaningful effect size, α, and sample size.! • Compute range of values for combinations of parameters. ! Prospective Power Analysis
Page 1 and 2: STATISTICAL POWER ANALYSIS IN WILDL
Page 3 and 4: !Interrelated components: target po
Page 5: !Effect: magnitude of response, ori
Page 9 and 10: Typical constraints:! • Maximum n
Page 11 and 12: • Change to crossover (paired) de
Page 13 and 14: Power is calculated using sample si
Page 15 and 16: Confidence Intervals and Power
Page 17 and 18: Points To Remember:! • Hypothesis

Statistical Power - People.stat.sfu.ca

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