Five observations taken for two variables follow. X] 4 6 12 4 13 y 40 50 30 50 20 a. Which of the following scatter diagrams accurately represents the data set? 1. +60 -40 +20 -2.5 2,5 ..75.10 13.5 15 % 2. +60 +40 +20 2.5 2,5 5 7.5 10 12.5 15X Eignment 3. +60 +40 +20 2,5 -2,5.....75.10.125.15 X Scatter diagram 2 : b. What does the scatter diagram developed in part () indicate about the relationship between the two variables? The relationship is negative c. Compute the sample covariance (to 1 decimal place). If your answer is negative, enter 'minus' signe.g. -300. d. Compute the sample correlation coefficient (to 3 decimals). If your answer is negative, enter 'minus' sign e.g. -300 What can you conclude, based on your computation of the sample correlation coefficient? There is a strong negative linear relationship . Hide Feedback