If we reject a null hypothesis of "no difference" at the 0.05
level
a. the odds are 20 to 1 in our
favor that we have made a correct decision
b. the null hypothesis is
true.
c. the odds are 5 to 1 in our favor
that we have made a correct decision.
d. the research hypothesis is
true.
In most cases, a researcher sets out to
a. prove the null hypothesis.
b. disprove the null
hypothesis.
c. prove the research
hypothesis.
d. disprove the research
hypothesis.
If we reject a null hypothesis which is in fact true, we
a. have made a correct
decision.
b. have made a Type I error.
c. have made a Type II error.
d. should have used a one-tailed
test.