Five observations taken for two variables follow. 6 12 4 14 40 40 30 60 20 a. Which of the following scatter diagrams accurately represents the data set? A. B. 60 -6 60 - -50 50 40 05 -40 - 30 -30 20 20 ---- -10 10 10 20 30 40 X 10 20 30 40 Xy 5' so a so a so so 40 e e 40 e e 30 a 30 a 20 e 20 e lo 10 10 20 so 40 x 1p 2p 30 40 I A vl w b. What does the scatter diagram developed in part {a} indicate about the relationship between the two variables? I The relationship is negative. VI 9 1:. Compute the sample covariance [to 1 decimal and enter negative value as negative figure]. 0 Interpret the sample covariance. I The negative value [If the sample covariance indicates a negative linear relationship. VI w d. Compute the sample correlation coefficient {to 3 decimals and enter negative value as negative gure). 3