1. (15 pts) The stemplot below displays midterm exam scores for 34 students taking a calculus course. The highest possible test score was 100. The teacher declared that an exam grade of 65 or higher was good enough for a grade of C or better.

3 | 6, 8

4| 1,4, 8

5| 3,3,4,4

6| 2,3,3,5,5,6,7

7| 0,0,1,2,3,5,6,6,8,8,9

8| 1,1,3,5,

9|0,3,9

(a) Give the median and interquartile range.

(b) Find the percent of students earning a grade of C or higher (as declared by the teacher).