Table : TABLE 5-2. Hypothesis Testing: Hypotheses and Decisions The null hypothesis posits no difference, on average, whereas the research hypothesis posits a difference of some kind. There are only two decisions we can make. We can fail to reject the null hypothesis if the research hypothesis is not supported, or we can reject the null hypothesis if the research hypothesis is supported.
HypothesisDecision
Null hypothesisNo change or differenceFail to reject the null hypothesis (if research hypothesis is not supported)
Research hypothesisChange or differenceReject the null hypothesis (if research hypothesis is supported)