1. With the following data in 6 cities, calculate Pearson's coefcient of correlation between the density of population and death rate: City Area in Kilometers Population(in'000) N0.of.deaths A 150 30 300 B 180 90 1440 C 100 40 560 D 60 42 840 E 120 72 1224 F 80 24 312 2. Find the coefcient of correlation from the following data: Cost 39 65 62 90 82 75 25 98 36 78 sales 47 53 58 86 62 68 60 91 51 84 3. The following data relates to the scores obtained by a salesman of a company in an intelligence test and their weekly sales (in rs 1000's): Salesman intelligence A B C D E F G H I Test score 50 60 50 60 80 50 80 40 70 Weekly sales 30 60 40 50 60 30 70 50 60 (a) Obtain the regression equation of sales on intelligence test scores of the salesmen. (b) If the intelligence test score of a salesman is 65, what would be his expected weekly sales