A researcher is testing a hypothesis of a single mean.The critical z value for $\alpha$ = .05 in a two-tailed test is +1.96.The observed z value from sample data is -1.85.The decision made by the researcher based on this information is to _____ the null hypothesis.
A)reject
B)fail to reject
C)redefine
D)change the alternate hypothesis
E)restate

Question

Quizplus · Accepted Answer

Since the observed z value (-1.85) is within the critical z values (-1.96 and +1.96) for a two-tailed test at α = .05, the researcher does not have sufficient evidence to reject the null hypothesis.

A Researcher Is Testing a Hypothesis of a Single Mean α\alphaα

A Researcher Is Testing a Hypothesis of a Single Mean $\alpha$