Surgery W W Died 83 106 Alive 2134 242 (a) State the appropriate null hypothesis and alternative hypothesis. Calculate the test-statistic. Find the range for the p-value. rs-Kr\" :3an State your decision. Did you reject, or fail to reject. the null? State your conclusion in terms of the problem. /\\/"-\\ H10 VNH/ What was the sample estimate of the probability of death, if you were in group Surgery? (g) What was the sample estimate of the probability of death, if you were in group WW? . A randomized experiment was conducted in which pa- tients with coronary artery disease either had angio- plasty (A) or bypass surgery (B). The accompanying ta- ble shows the treatment type and if chest pain occurred over the next 5 years: A B Pain 111 74 No Pain 302 341 Assume we want to test if chest pain was independent of treatment, with o: : 0.01. a State the a ro riate null h othesis and alternative pp p yp hypothesis. (b) Calculate the teststatistic. c Find the ran e for the value. ( ) g P- (d) Interpret your pvalue in terms of the problem. (e) State your decision. Did you reject, or fail to reject the 111111? (f) State your conclusion in terms of the problem. (g) What was the sample estimate of the probability of pain, if you were in group A? (h) What was the sample estimate of the probability of pain, if you were in group B? 7. Men with prostate cancer were randomly assigned to un- dergo surgery, or "watchful waiting" (WW). The results over the next several years are found below: Assume we want to test if death was independent of what group they were in (Surgery, WW) with a = 0.05