Question

Question 18 Not yet answered You have the following data: 2x = 36. Ey = 37, Exy = 245, Er? = 246, Ey? = 249, n=6. Marked out of 200 F Flag question these data illustrate the relationship between the number of rooms (X) and the amount of electricity consumed (™) per thousand kilowatts. Find the equation of the regression line between the number of rooms (X) and the amount of electricity consumed (Y). Select one: O AY = 0.77 X - 1.546 OB. Y = 0.77 X - 1.546 O C. Y = 0.77 X + 1.546 O D. Y = -0.77 X +1.546

Answer 1

The solution to this problem is given below

pooms (x) and kilowatts as The informations the number of the amount of electricity consemed (1) per thousand are given follows - Ex=36 E xy = 245 2 = 246, Ey? = 249, n=6. So, equation of begression line between Х and given by , = aby Ey= 37 the Y is bj x (x-x) Y = J + where byx Now, cor (x, y) = Cov(x,y) var() Exy - X = *245) -36 37 3.833

08 Var (x) - ² (6x246) - (136) 41- 36 10 -5 3.833 = 0,77 5 12 01 :. byx The equation is, (x-7) = (* 32) + 0.47 (x== 02 y + 0.77 36 0.77X + 1.546 . Y = 0.774 + 1.546 .. The correct option is c.