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

Multiple Choice

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 -2.11.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