1.

(b) What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? 0 There appears to be a negative linear relationship between xand y. 0 There appears to be no noticeable relationship between x and y. O There appears to be a positive linear relationship between x and y. (c) Try to approximate the relationship between x and y by drawing a straight line through the data. y 18 15 12 .V 13 1a 15 15 12 o 12 9 9 C 6 . s 3 3 X 1 2 3 4 5 6 0 . . _ _ _ 2(x, my,- i7) _ _ (d) Develop the estimated regressmn equation by computing the values of b0 and b1 using b1 = and b0 = y blx. Xi x (e) Use the estimated regression equation to predict the value of y when x = 4. :l Given are five observations for two variables, x and y. Vi 10 l3 (a) Develop a scatter diagram for these data. y y y 18 18 18 15 15 15 C 12 12 12 . O 9 . 9 . 9 0 C 6 6 C 6 C 3 o 3 O 3 O . . . X . . . . . . X . . . . . . X 0 4 5 6 0 1 2 3 4 5 6 0 'l 2 3 4 5 6 (D 0 0 y 18 15 12 9 C 6 O 3 . . . X 0 4 5 6