Calculate the power using power-chart (Page 171 Aday and Cornelius) for a t-test to detect a medium effect size in a study with 100 participants each in the intervention and control group. Assume alpha (Type I error) of 0.05 and apply Cohen's rule of thumb for effect size (ES). Refer to Power and Sample size lecture for Cohen's ES. Answers within ± 2 values of the correct answer will be accepted.
Enter the % Power below (For e.g., if power is 20%, then enter 20):