Five observations taken for two variables follow. 4 6 11 3 16 50 50 40 60 30 a. Which of the following scatter diagrams accurately represents the data set? A. B. Y 60 ---- 60 -500 50 - -40 40 -30- -309 -20 -20 -10 -10 10 20 30 40 10 20 30 40 XC. D. y -609 -60 - 50-- -500 -40 -40 -30 -30 -20 -20 -10 -10 10 20 30 40 10 20 30 40 C b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? The relationship is negative. v c. Compute the sample covariance (to 1 decimal and enter negative value as negative figure). Interpret the sample covariance. The negative value of the sample covariance indicates a negative linear relationship. v d. Compute the sample correlation coefficient (to 3 decimals and enter negative value as negative figure)