Question: A statistics professor is investigating the relationship between tutorial class size and academic performance for a first-year business statistics course. She collects data on the

A statistics professor is investigating the relationship between tutorial 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 (/100) for a sample of 15 classes. < CLASS_SIZE >

a. Construct a scatter diagram.

b. Assuming a linear relationship, use the least-squares method to find the regression coefficients, b0 and b1.

c. Interpret the meaning of the slope, b1, in this problem.

d. Predict the average class mark for a tutorial of 20 students.

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