CBEST CBEST - California Basic Educational Skills Math: Data Interpretation and Statistics 2 — Questions and Answers
Question 1: A table shows sales data: Monday $200, Tuesday $350, Wednesday $150, Thursday $400, Friday $300. Which day had the highest sales?
- Thursday (Correct answer)
- Tuesday
- Friday
- Monday
Correct answer: Thursday
Thursday had the highest sales at $400.
Question 2: The range of the data set {4, 7, 2, 9, 5, 11} is:
- 9 (Correct answer)
- 7
- 11
- 5
Correct answer: 9
Range = Maximum − Minimum = 11 − 2 = 9.
Question 3: A double bar graph compares boys' and girls' reading scores across three grades. What type of comparison does this graph best support?
- Comparing two groups across multiple categories (Correct answer)
- Showing change over time for one group
- Displaying parts of a whole
- Ranking items from least to greatest
Correct answer: Comparing two groups across multiple categories
Double bar graphs are designed to compare two groups side-by-side across multiple categories.
Question 4: If the probability of rain on any given day is 0.3, what is the probability it will NOT rain?
- 0.7 (Correct answer)
- 0.3
- 0.6
- 1.3
Correct answer: 0.7
P(not rain) = 1 − 0.3 = 0.7.
Question 5: A histogram shows the distribution of student ages in a class. The y-axis represents frequency. What does a tall bar indicate?
- Many students are that age (Correct answer)
- That age group scored the highest
- That age group is the oldest
- Few students are that age
Correct answer: Many students are that age
In a histogram, bar height represents frequency, so a taller bar means more students fall in that interval.
Question 6: A survey of 50 teachers shows 30 prefer online grading tools. What percentage prefer online grading tools?
- 60% (Correct answer)
- 30%
- 50%
- 75%
Correct answer: 60%
30 ÷ 50 × 100 = 60%.
CBEST CBEST - California Basic Educational Skills Math: Data Interpretation and Statistics 2
A table shows sales data: Monday $200, Tuesday $350, Wednesday $150, Thursday $400, Friday $300.
Which day had the highest sales?