Question 6 Professor wanted to continue with scientist research from problem 7. He selected new sample of 25 students and investigated effect of midterm, quizzes and homework to predict the final exam grade. He obtained following minitab output. The regression equation is Final = 48.76 + 0. 0124 Midterm + 0. 176 Quiz + 0.15 Homework Coefficients Term Coef SE Coef T-Value P-Value Constant 48 . 76 2. 68 1. 30 0.231 Midterm 0. 0124 0. 00949 0. 12 0.041 Quiz 0. 176 0. 017 1. 70 0 . 069 Homework 0. 15 0 . 019 2 . 40 0. 000 S R-sq R-sq (adj) R-sq (pred) 5. 75619 78. 638 89.20% 90. 008 a) Explain the meaning (in the context of the problem) of R-sq (Coefficient of determination)? b) What is the predicted Final exam score if Midterm grade is 78, quiz grade is 90 and homework grade is 100. c) Which variable is not significant at 4.5% level of significance? Explain why