Psychologists Wish to Evaluate the Consistency of a Standardized Behavioral

question 25

Multiple Choice

Psychologists wish to evaluate the consistency of a standardized behavioral test.The test is designed to have a variance of 225.Twenty randomly sampled tests yield a variance of 240.Assuming the underlying population is normal, test whether the actual population variance of this test appears to be significantly greater than its designed variance.State the critical value (CV) , test statistic (TS) , and conclusion from the test.(Use α = 0.01.)

• A) CV = 27.2036; TS = 20.267; fail to reject H₀
• B) CV = 36.1909; TS = 18.377; fail to reject H₀
• C) CV = 36.1909; TS = 20.267; fail to reject H₀
• D) CV = 27.2036; TS = 17.8125; reject H₀

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