Question

Which of the following is correct about the power of the test? Check all that apply. a. As alpha increases, power decreases. b. As standard error decreases, power increases. c. As Type I error increases, power increases. d. As effect size increases, power increases. e. As sample size increases, power increases. f. As sample size increases, power is unaffected. g. As Type II error decreases, power decreases.

Answer 1

The correct options are: b., c., d., and e.

Power increases with increase in sample size and vice versa.

Power decreases with increase in standard error and vice versa. (since sample size and std. error are inversely related).

Power decreases with increase in type II error and vice versa.(So, as Type II error decreases, power increases).

Power increases with increases in type I error(alpha) and vice versa.

Power increases with increase in significance level and vice versa. (since alpha and significance level are the same).

Power increases with increase in effect size and vice versa.