Learning Check, hypothesis testing

1. How would you test the hypothesis that a new employee incentive program really works?

a. Try to disprove the hypothesis that it works.
b. Try to prove the hypothesis that it does work.
c. Try to disprove the hypothesis that it doesn't work.
d. Try to prove the hypothesis that it doesn't work.

2. How do you determine whether or not to reject the null hypothesis? Check to see if:

a. the Z score for the statistic is < -1 or > +1.
b. the critical Z score is > +1.96 or < -1.96.
c. the Z score of statistic is more extreme than the critical Z score
d. the Z score of the standard error exceeds the standard deviation of the sample.

3. A one-tailed test is especially associated with

a. the research hypothesis.
b. the null hypothesis.
c. a nondirectional hypothesis.
d. a directional hypothesis.

4. How is the significance level of a hypothesis test that supported the research hypothesis typically reported?

a. p = 5%.
b. p > .05.
c. p < .05.
d. All are common.

Answers below:

1. c
2. c
3. d
4. c