Strange is interested in determining the effectiveness of a new heart medication. He randomly assigns 93 participants into 3 groups (no medication, current medication, new medication), with 31 participants in each group. He counts the number of heart palpitations that occur in participants while they are taking their assigned treatments. Dr. Strange wants to determine if there is a significantly different number of heart palpitations based on the treatment a patient receives.

Use the table below to calculate the effect size (R square).

Source SS df MS. F

Between 150

Within. 250

Total. 400