QUESTION 4 Suppose an analyst takes a random sample of 5 recent truck shipments made by a company and records the distance in miles and delivery time in days that the shipment was made available for pick-up. The observations are as follows: Distance (miles) 800 200 1070 550 380 Delivery time (days) 2 2 Determine the covariance between the two variables. Use the sample covariance formula: EL ( X, - X) ( Y, - Y) n - 1 O a. 427.5 O b. 390 O G. 343.75 O d. 396.25 O e. 421.25 QUESTION 5