Researchers have collected data on the hours of studying in a week and the exam grade of a student. You are given the data below (10 points). Hint: This questions is similar to Q1 in HW7. Hours of Studying Exam Grade 1 55 3 75 4 80 3 85 6 99 a. Develop a least squares estimated regression equation (2 points). b. What is the coefficient of determination; how do you interpret this number? Make a comment on the strength of the regression relationship (2 points). c. Is the slope significant? Use a t test and let = .05. State your hypothesis, test statistic, and conclusion (2 points). d. At the 5% level of significance, test to determine if the model overall is significant. State your hypothesis, test statistic, and conclusion (2 points). e. Using the least squares regression line, what would the predicted exam grade be for 5 hours of studying (2 points)