PSAT/NMSQT Data Interpretation & Analysis 2

Question 1

A bar graph shows sales of 40, 55, 35, and 70 units across four months. What is the mean number of units sold per month?

Accepted Answer

50

Answer

The sum is 40+55+35+70=200, divided by 4 months equals 50.

Question 2

A line graph shows a value rising from 20 to 50 over 6 hours at a constant rate. What is the rate of change per hour?

Accepted Answer

5 per hour

Answer

The change is 50-20=30 over 6 hours, so 30/6=5 per hour.

Question 3

A pie chart shows 25% of students prefer math. If 240 students were surveyed, how many prefer math?

Accepted Answer

60

Answer

25% of 240 is 0.25 × 240 = 60.

Question 4

A scatterplot shows points trending downward from left to right. What does this indicate about the two variables?

Accepted Answer

A negative association

Answer

A downward trend means as one variable increases, the other decreases, a negative association.

Question 5

A table lists test scores: 80, 85, 90, 90, 95. What is the median score?

Accepted Answer

90

Answer

With five ordered values, the median is the middle (third) value, 90.

PSAT/NMSQT Practice Test