QUESTION 4 4 points Save Answer The following table shows the average grade for all sections of OPRE 3360 and their respective class sizes. Calculate the average grade for all the students enrolled in OPRE 3360. Section Class SizeClass Average 1 65 3.1 2 70 3.6 3 75 3.3 4 50 3.2 5 60 3.3 3.3 64.182 O 3.297 3.309 QUESTION 5 3 points Save Answer The following sample represents the daily demand (y in units) and the unit price (x in dollars) for a product. Answer questions 5-6. Daily Demand (y_i) Unit Price (x_i) V-1^2 (V;-742 (X; - x)^2 (X;-)(V;-) y_1 |x_1 25 9 15 y_2 ||X_2 1 0 0 y_3 x_3 25 19 15 y_4 X_4 14 1 12 y_5 ||x_5 19 1 13 What is the covariance of the two variables (Daily Demand and Unit Price)? 05 07 0 8.75 O 12 QUESTION 6 4 points Save Answer What is the correlation coefficient of the two variables (Daily Demand and Unit Price)? Sxy 51.2 8.944 0 7.155 Sxy Sxy Sxy 80