Question 37 (2 marks) Bartek specializes in the sale of office supplies and has several branches across the country. An extract of the annual turnover of a sample of 28 branches as well as the adult population corresponding to pour each city where the branch is located is available. The following sums are given below: C.Y. = 2012, 4 EY = 2485.5 1=1 1=1 n EX =166085,22 EXY = 199198.75 i=1 1=1 What is the value of the regression coefficient b,? 0.6121 0.8425 0.7382 0.9586 0.5130