PSSA PSSA Data Analysis and Statistics 2

Question 1

A bag contains 4 red marbles, 3 blue marbles, and 5 green marbles. If one marble is drawn at random, what is the probability it is NOT green?

Accepted Answer

7/12

Answer

There are 4 + 3 = 7 non-green marbles out of 12 total, so P(not green) = 7/12.

Question 2

The following data represents students' quiz scores: 70, 75, 80, 80, 85, 90, 95. What is the range?

Accepted Answer

25

Answer

The range is the difference between the maximum and minimum values: 95 - 70 = 25.

Question 3

A pie chart shows that 25% of students chose math as their favorite subject. If 200 students were surveyed, how many chose math?

Accepted Answer

50

Answer

25% of 200 = 0.25 × 200 = 50 students chose math as their favorite subject.

Question 4

Which measure of central tendency is MOST affected by an outlier (an extremely high or low value)?

Accepted Answer

Mean

Answer

The mean is most affected by outliers because it includes all values in its calculation, pulling the average toward extreme values.

Question 5

A double bar graph compares boys' and girls' favorite sports. If 15 boys and 10 girls prefer swimming, what fraction of the total (25) prefer swimming?

Accepted Answer

3/5

Answer

15 boys + 10 girls = 25 prefer swimming; 25/25 students in the swimming category means 3/5 of the boys prefer swimming (15/25 = 3/5).

PSSA - Pennsylvania System of School Assessment Practice Test

PSSA - Pennsylvania System of School Assessment Practice Test

PSSA PSSA Data Analysis and Statistics 2