Statistical power
15-A: Defining and visualizing power
15-A: Defining and visualizing power
Learning Objectives
Be able to identify and draw the null distribution, alternative distribution, alpha, 1 - alpha, beta, and statistical power
READ: Defining and visualizing power
READ: Understanding Statistical Power
15-B: Factors impacting power
15-B: Factors impacting power
Learning Objectives
What are factors that would impact power
Know the effect of effect size on power
Know the effect of one- versus two-tailed tests on power
Know the effect of variance on power
Know the effect of α level on power
READ: Factors impacting power
DEMO: http://onlinestatbook.com/2/power/power_demo2.html
15-C: Computing power
15-C: Computing power
Learning Objectives
Understand how to compute power with the normal and binomial distributions
READ: Computing power
READ: Example Power Calculations