Use the folloving information to anaver questions 8-12. A medical research team

Question

Use the folloving information to anaver questions 8-12. A medical research team conducted a study to test the effect of a cholesterol reducing medication. At the end of the study, the researchers found that of those 4700 randomly selected subjects who took the medication, 301 died of heart disease. Of 4300 randomly selected subjects who took a Placebo, 357 died of heart disease. Let pi- Pmedication, Population proportion Let P2 Pplactbo, Population proportion Do these data indicate that the death rate due to heart disease is lower for those who took the medication than for those who took the placebo? Use a 1% level of significance. 8) State the appropriate null and alternative hypothesis to use. 9) The null hypothesis in problem. 8) is to be tested at the 1% level of significance. The rejection region (regions) from the table is (are): a) z-1.96 or>1.96 b)>1.96 c) zs-1.96 d) z1.645 e) >1.645 f)-1.645 g zs-2.33 or z>2.33 h) z2.33 j)zK-1.645 ID 1.86 n) z 1 .86 k) z P1.645 m) zc -1.86 o) None of the above

Explanation / Answer

8) here null hypothesis: p1 =p2

alternate hypothesis: p1< p2

9) for 1% level of signifiance and left tailed test critical value of z =-2.33

therefore option H is correct

( please revert if there are other sub parts_)

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