12. A student took a random sample of 10 students enrolled in an accounting class last semester, asking each to report the total amount of time spent studying for the course and the grade that the...

Extracted text: 12. A student took a random sample of 10 students enrolled in an accounting class last semester, asking each to report the total amount of time spent studying for the course and the grade that the student received. The data is listed below: Study Time Grade 40 77 42 63 37 79 47 86 25 51 44 78 41 83 90 48 35 65 28 47 a. Calculate the covariance. b. Calculate the coefficient of correlation. x C. Calculate the coefficient of determination. Kd. Determine the least squares line. What do the statistics calculated above tell you about the relationship between the marks and study time? е.