1. If a teacher wants to see if students in college classes most commonly receive B as a grade, she will consider the ____ of data.

a. mean

b. proportion

c. mode

d. variance

2.Use the following data sample to answer the question.

4, 14, 6, 9, 21, 3, 7, 10

What is the variance of this data sample?

a. 5.90

b. 243.5

c. 4.33

d. 34.79