Math Math Statistics and Data Analysis

Question 1

What is the mean of the data set: 4, 8, 6, 10, 12?

Accepted Answer

8

Answer

Mean = (4 + 8 + 6 + 10 + 12) ÷ 5 = 40 ÷ 5 = 8.

Question 2

What is the median of the data set: 3, 7, 2, 9, 5?

Accepted Answer

5

Answer

Ordered: 2, 3, 5, 7, 9 — the middle value is 5.

Question 3

A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of drawing a blue marble?

Accepted Answer

1/2

Answer

P(blue) = 5 ÷ (3 + 5 + 2) = 5/10 = 1/2.

Question 4

What is the mode of the data set: 4, 7, 4, 9, 7, 4, 3?

Accepted Answer

4

Answer

4 appears three times, more than any other value, so it is the mode.

Question 5

What is the range of the data set: 15, 3, 22, 8, 17?

Accepted Answer

19

Answer

Range = maximum − minimum = 22 − 3 = 19.

Math Practice Test