Answer to Question #252438 in Statistics and Probability for Pearl

Question

est marks are assumed to follow a normal distribution. The test marks of 25 randomly selected students yielded a 99% confidence interval for the population mean of: (40.6; 71.9). When using this confidence interval to test the hypothesis that the mean is different from 60, which one of the following statements is false?

Group of answer choices

A. H₀: µ = 60  vs. H₁: µ > 60

B. This interval can only be used to test at the 1% level of significance

C. This interval can only be used to test a two-sided hypothesis

D. At the 1% level of significance there is insufficient evidence that the average test mark is not 60

E. Since 60 is included in the confidence interval, H₀ is not rejected

Answer 1

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