Question

6. Find the expected value of the random variable: 2 الدها X P(x) 0 0.32 4 0.10 0.23 0.3 0.05 A) 1.38 B) 2.22 C) 2.09 D) 1.42 E) None of the Above 7. Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. 42 male and 33 female dogs at a local rescue are chosen, and 12males and 12 females are randomly chosen from these groups. A) Stratified B) Cluster C) Convenience D) Stratified E) None of the Above 8. A group of volunteers for a clinical trial consists of 81 women and 98 men. 31 of the women and 27 of the men have high blood pressure. If one of the volunteers is selected at random, find the probability that the person has high blood pressure given the person is a man. A) 27/98 B) 31/81 C) 31/58 D) 27/98 E) None of the Above

Answer 1

X I 2 3 T pix) 0 3 2 0.3 0.23 Dios o il Eix) saplal O-+ 0:23 +0.6 +0.15 +0.4 1:3X al lon ay es stratefied duided and as population strata of Men en to Women 3] Dl high blood man! 9_า 98 aj cod af