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 test statistic from sample data is -1.85. The decision made by the researcher based on this information is to ___ the null hypothesis.
A) reject
B) not reject
C) redefine
D) change the alternate hypothesis into
E) restate the null hypothesis

Question

Quizplus · Accepted Answer

The researcher cannot reject the null hypothesis because the test statistic (-1.85) does not fall in the rejection region defined by the critical z value (+/-1.96). Therefore, there is not enough evidence to reject the null hypothesis at the 0.05 level of significance.

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

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