Chapter 10.4A, Problem 20A

To determine

(a)

To find:

Mean of grades.

To determine

(b)

To find:

Median of grades.

To determine

(c)

To find:

Mode of grades.

To determine

(d)

To find:

Inter quartile range of grades.

To determine

(e)

To find:

Variance of grades.

To determine

(f)

To find:

Standard deviation of grades.

To determine

(g)

To find:

Mean absolute deviation of grades.