The following data represents the final grades of these 20 students.

Grades

87 69 78 85 89 70 65 96 88 89 85 77 93 76 87 84 90 87 88 87

Calculate the following statistics:

1. Average

2. Median

3. Fashion

4. Medium Range

5. Rank

6. Standard Deviation 7. Variance

8. Minimum

9. Q1

10. Q2

11. Q3

12. Maximum

Is the distribution of this sample symmetric or biased? Plot the results of this analysis on a Box and Whisker diagram.