PSSA PSSA Data Analysis and Statistics 3

Question 1

A line plot shows the number of books read: × above 1, 2, 3, 4, 5. There are 3 X's above 3 and 2 X's above 5. What does this data tell us?

Accepted Answer

More students read 3 books than 5 books

Answer

The 3 X's above 3 compared to 2 X's above 5 show that more students read exactly 3 books than 5 books.

Question 2

The mean of five numbers is 12. Four of the numbers are 10, 14, 11, and 13. What is the fifth number?

Accepted Answer

12

Answer

The total sum must be 5 × 12 = 60; the four known numbers sum to 48, so the fifth number is 60 - 48 = 12.

Question 3

A pictograph uses a symbol of a book to represent 5 students. If a row shows 4 books, how many students does it represent?

Accepted Answer

20

Answer

Each book symbol represents 5 students, and 4 symbols × 5 = 20 students.

Question 4

Which of the following is a correct definition of 'probability'?

Accepted Answer

The likelihood that an event will occur

Answer

Probability is defined as the measure of the likelihood or chance that a specific event will occur.

Question 5

A scatterplot shows a positive correlation between hours studied and test scores. What does this mean?

Accepted Answer

As hours studied increase, test scores also increase

Answer

A positive correlation means both variables increase together — as hours studied go up, test scores tend to go up as well.

PSSA - Pennsylvania System of School Assessment Practice Test