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 fe e 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 statistici: 1)Test stat - 2.5 ii) Test stat -2.6 in) Test stat -3.25
show work.

Answer 1

9. Solution: Given that: -80 * Mean Average scose 10 Standad rol dello -0.01 la) H, :41 #80 Neu Hypothesis Ho : U = 80 Alternative Hypothesis We use 2-test shaded Region Fol d =0.01 in critical Region ibi ANCO,1] Lola = 0.0118 70.005 = 2:58 AR 0.008 0.005 0 2.18

id, z = 9.5 Heee 1701-2.5 > 20.025 51196 Reject Ho ji, z .-2.6 Hele 1701=-2.6 :-2.6 1.96 Fail to Reject lii, 70 - 3.05 Here Izol = 3.25 - 3.25 > 1.96 Reject to There is no sufficient evidence to suppost the claim that the average * There is sufficient evidence to support the claim that he average * There is no sufficient evidence to support the claim that the ang mean ave score is 8o mean is 80 mean scole is 8o.