Hypothesis Testing

1-Beta (β)

Increase in this factor will? Affect power how?

Alpha (α) ?

Effect Size ?

Sample Size (N) ?

Standard Deviation (σX) ?

Tails of Test ?

Power factors

Sample Size Increase

Sample Size Decrease

Effect Size Increase

Effect Size Decrease

Standard Deviation Decrease

Standard Deviation Increase

Alpha Decrease

Tails Decrease

1-Beta (β)

Increase in this factor will? Affect power how?

Alpha (α) Increase power

Effect Size Increase power

Sample Size (N) Increase power

Standard Deviation (σX) Decrease power

Tails of Test Decrease power

Power factors

Factor

How much control does

the experimente

r have?Sample Size A lotStandard Deviation of Population Scores

A little

Effect Size NoneAlpha Level Very Little

Number of Tails Very Little

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

Power calculations