A researcher is testing a hypothesis of a single mean.The critical z value for $\alpha$ = .05 and 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 into
E)restate the null hypothesis

Question

Quizplus · Accepted Answer

The observed z-value (-1.85) does not exceed the critical z-value (1.96) for a two-tailed test at a significance level of .05. Therefore, the researcher fails 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 $\alpha$