11. The following grouped frequency distribution contains the exam 3 scores of all MAT130 students. a. Complete the table and use it to calculate the mean of Class Midpoint Frequency the exam 3 scores. (4 pts) 0%-9% 10%-19% 10 20%-29% 16 30%-39% 18 b. Why is the mean you calculated an approximation? (2 40%-49% 29 pts) 50%-59% 35 60%-69% 34 70%-79% 36 80%-89% 28 90%-100% 19 Draw a histogram of the data set. Be sure to include labels. (4 pts) d. What do the weighted mean and the histogram tell you about the scores on exam 3? (4 pts)