Learning Check, Power, Effect Size, Error

1. Power is affected by sample size, effect
size, whether a one- or two-tailed test is
used, and _________.

2. Increasing sample size ________ power.

3. Using the .01 level of significance
instead of .05 decreases the chance of
making a(n) __________. It also
decreases the _______ of a study.

4. If the research hypothesis is true, but the study testing it has a low level of power,

a. a significant result is highly probable.

b. the probability of obtaining a significant result is low.

c. the null hypothesis will almost
certainly be rejected.

d. beta is necessarily low.

Answers below

Answers, LCheck Power/Effect Size/Error

1. alpha, significance level

[standard deviation of population also
correct]

2. increases

3. Type I error; power

4. b