I need answer: A researcher is testing a hypothesis of a single mean. The critical z value for = .05 and a two-tailed test is +1. The observed z...

I need answer:A researcher is testing a hypothesis of a single mean. The critical z value for α = .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. not reject redefine change the alternate hypothesis into restate the null hypothesis reject

A researcher is testing a hypothesis of a single mean. The critical z value for α = .05 and a two­tailed test is +1.96. The observed z value from sample data is ­2.11. The decision made by the...