Hypothesis Testing

Power factors 1-Beta (β) Increase in this factor will? Affect power how? Alpha (α) ? Effect Size Sample Size (N) Standard Deviation (σX) Tails of Test

Sample Size Increase

Sample Size Decrease

Effect Size Increase

Effect Size Decrease

Standard Deviation Decrease

Standard Deviation Increase

Alpha Decrease

Tails Decrease

Power factors 1-Beta (β) Increase in this factor will? Affect power how? Alpha (α) Increase power Effect Size Sample Size (N) Standard Deviation (σX) Decrease power Tails of Test

How much control does the experimenter have? Factor How much control does the experimenter have? Sample Size A lot Standard Deviation of Population Scores A little Effect Size None Alpha Level Very Little Number of Tails

Power calculations Only used in this class with single sample Z tests where population mean and standard deviation is given/known Otherwise , it would be a calculation horror show