West B Test West B Math: Data Analysis and Statistics

Question 1

The test scores of five students are: 72, 85, 90, 68, and 95. What is the mean (average) score?

Accepted Answer

82

Answer

The mean is (72+85+90+68+95) ÷ 5 = 410 ÷ 5 = 82.

Question 2

In the data set {3, 7, 7, 9, 12, 15}, what is the mode?

Accepted Answer

7

Answer

The mode is the value that appears most often; 7 appears twice while all others appear once.

Question 3

A bar graph shows four categories with values 10, 25, 15, and 30. Which category has the highest value?

Accepted Answer

The category with value 30

Answer

30 is the largest value among 10, 25, 15, and 30, so that category is tallest on the bar graph.

Question 4

What does the median represent in a data set?

Accepted Answer

The middle value when data is ordered

Answer

The median is the middle value in a data set that has been arranged in order from least to greatest.

Question 5

A pie chart shows that 40% of students prefer math, 35% prefer reading, and 25% prefer science. What percentage prefer either math or science?

Accepted Answer

65%

Answer

Adding math (40%) and science (25%) gives 65% of students preferring either math or science.

West B Test Practice Test