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A researcher is testing a hypothesis of a single mean. The critical z value for a = .05 and a twotailed test is + 1.96.

A researcher is testing a hypothesis of a single mean. The criticalzvalue for

a= .05 and a twotailed test is+1.96. The observedzvalue from sample data is 2.85. The decision made by the researcher based on this information is to _____ the null hypothesis.

Select one:

a.fail to reject

b.change the alternate hypothesis into

c.restate the null hypothesis

d.reject

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