CBEST CBEST - California Basic Educational Skills Math: Data Interpretation and Statistics 1 — Questions and Answers
Question 1: A bar graph shows test scores for 5 students: 72, 85, 90, 68, and 95. What is the median score?
- 85 (Correct answer)
- 82
- 90
- 80
Correct answer: 85
Arranging scores in order (68, 72, 85, 90, 95), the middle value is 85.
Question 2: A pie chart shows that 40% of a school's 300 students prefer math. How many students prefer math?
- 120 (Correct answer)
- 40
- 160
- 100
Correct answer: 120
40% of 300 = 0.40 × 300 = 120 students.
Question 3: The mean of five numbers is 14. Four of the numbers are 10, 12, 16, and 18. What is the fifth number?
- 14 (Correct answer)
- 12
- 16
- 10
Correct answer: 14
Sum = 14 × 5 = 70; 70 − (10+12+16+18) = 70 − 56 = 14.
Question 4: A line graph shows rainfall (inches) for January through April: 3, 5, 4, 6. What is the average monthly rainfall?
- 4.5 (Correct answer)
- 5
- 4
- 6
Correct answer: 4.5
(3+5+4+6) ÷ 4 = 18 ÷ 4 = 4.5 inches.
Question 5: In a frequency table, the mode of a data set refers to which value?
- The value that appears most often (Correct answer)
- The middle value
- The average of all values
- The difference between highest and lowest
Correct answer: The value that appears most often
The mode is the value that occurs with the greatest frequency in a data set.
Question 6: A scatter plot shows a strong positive correlation between study hours and test scores. What does this mean?
- As study hours increase, test scores tend to increase (Correct answer)
- As study hours increase, test scores tend to decrease
- Study hours have no effect on test scores
- Test scores are always high regardless of study hours
Correct answer: As study hours increase, test scores tend to increase
A positive correlation means both variables increase together.
CBEST CBEST - California Basic Educational Skills Math: Data Interpretation and Statistics 1
A bar graph shows test scores for 5 students: 72, 85, 90, 68, and 95.
What is the median score?