Astatistics professor is investigating the relationship between tutoriai class size and academic performance for a first-year business statistics course. She collects data on the tutorial class size (number of students) and average class mark (1100) for a sample of 15 classes. The results are displayed in the accompanying table. Complete parts (a) to ((1) below. g Click the icon to view the data table. E) a. Construct a scatter diagram. Choose the correct graph below. Tutorial Size T. .Ivn'inl r'.'... T. .'n'inl P;-I'I. A b. Assuming a linear relationship, use the leastsquares method to nd the regression coefcients, b0 and b1. b0:|:| b1=D (Round to two decimal places as needed) c. Interpret the meaning of the slope. D1, in this problem. Choose the correct answer betow. O A. The average mark when the number of students is 0 is b1. 0 B. For each increase of one student, the average mark is expected to increase by the absolute value of b1. 0 C. For each increase of one point in the average mark, the average number of students is expected to decrease by the absolute value of b1. 0 D. For each increase of one student, the average mark is expected to decrease by the absolute value of D1. d. Predict the average class mark for a tutorial class of 18 students. D (Round to the nearest integer as needed.) Tutorial Size Average Mark 16 78 26 65 22 67 11 80 28 60 22 63 18 72 28 59 9 82 15 70 21 65 19 72 21 68 28 66 16 76