A Researcher Expects a Treatment to Produce an Increase in the Population

question 44

Multiple Choice

A researcher expects a treatment to produce an increase in the population mean.The treatment is evaluated using a one tailed hypothesis test,and the test produces z = +1.85.Based on this result,what is the correct statistical decision?​

• A)​The researcher should reject the null hypothesis with α = .05 but not with α = .01.
• B)​The researcher should reject the null hypothesis with either α = .05 or α = .01.
• C)​The researcher should fail to reject H₀ with either α = .05 or α = .01.
• D)​The researcher should change α.

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