Question

Please answer all 3 questions

mpus A test of sobriety involves measuring the subject's motor skills. Twenty randomly selected sober subjects take the test and produce a mean score of 41.0 with a standard deviation of 3.7. At the 0.01 level of significance, test the claim that the true mean score for all sober subjects is equal to 40.0. Use the traditional method of testing hypotheses. The results for the test turn out to be: Hopp = 40.0.HAP 40.0. Test statistict-2.42. Critical values:t=-2.861, 2.861. Do not reject Ha There is not sufficient evidence to warrant rejection of the claim that the mean is equal to 40.0. If a defense attorney argues the results are flawed because the sample size was too small, is his argument in anyway valid here? No, the sample size is never an issue. No, because we did not reject the null hypothesis. Yes, because the test was unable to reject the null hypothesis. O. Yes, because we rejected the null hypothesis. O We need more information to answer. 907 JUL 21

Answer 1

16)

The probability of a type-one error will be reduced, but the type-two error probablity will increase.

17)

Ο Ηο: μ = 53.4, H1: μ: 53.4

18)

O No, because we did not reject the null hypothesis.

(since test statistic is not in rejection region)