Question

9. I claim that the mean average score on this final exam will be an 80. A student disagrees with me and decides to test my claim. The standard error is 10 and a = 1% Use this information to determine the following: (only need one diagram) a. State the null and alternative hypothesis b. Determine and draw the hypothesis testing model (label everything) c. Determine the critical value(s) d. Determine the conclusion for each of the following if the test statistic is: 1)Test stat = 2.5 ii) Test stat = -2.6 iii) Test stat = 3.25

Answer 1

Critical value = 0.01 Answers a) Hypothesis Hoiel = 80 Hii i 80 null hypothesis Alternative hypothesis. b) Here we using testing model 'Z-test' = 0.01 Q-17. 0.005 2012 zool/2 NCO,1) 0.005 0.oos 2.576 -2.576 at 2-00) 42.576=2 coiticou d) Test stat (il 2.5 zo = 2.5 2. So <2.576 Fall to reject Hó have sufficient evidence to support the Claim mean aug.score 180'

cii) zo=-2.6 - 2.6 C 21576 Fail to have reiect Hó sufficient evidorre the caim mean GUE.S.66 152, Support (iii) zo=3.25 3.257 2.576 Reject to sufficient evidence to that the moon ayg. There is claim the Scopport 80 score