PTA PTA Data Interpretation and Analysis 1 — Questions and Answers
Question 1: A bar chart shows sales of 40 in January, 60 in February, and 50 in March. What is the average monthly sales?
- 40
- 50 (Correct answer)
- 55
- 60
Correct answer: 50
Average = (40 + 60 + 50) ÷ 3 = 150 ÷ 3 = 50.
Question 2: A pie chart shows that 25% of students prefer math. If there are 200 students total, how many prefer math?
- 25
- 40
- 50 (Correct answer)
- 75
Correct answer: 50
25% of 200 = 0.25 × 200 = 50 students prefer math.
Question 3: A line graph shows a company's profits rising steadily from $10,000 in 2020 to $50,000 in 2024. What is the trend?
- Decreasing
- Stable
- Increasing (Correct answer)
- Fluctuating
Correct answer: Increasing
When values rise steadily over time on a line graph, this represents an increasing or upward trend.
Question 4: In a table showing test scores, the values are 72, 85, 90, 68, and 75. What is the median score?
- 72
- 75 (Correct answer)
- 85
- 90
Correct answer: 75
Arranged in order: 68, 72, 75, 85, 90 — the middle value (median) is 75.
Question 5: A table shows 5 students scored: 80, 90, 70, 100, 60. What is the range of scores?
- 20
- 30
- 40 (Correct answer)
- 50
Correct answer: 40
Range = highest score − lowest score = 100 − 60 = 40.
Question 6: A graph shows that City A has 3 times the population of City B, which has 20,000 people. What is City A's population?
- 23,000
- 40,000
- 60,000 (Correct answer)
- 80,000
Correct answer: 60,000
City A = 3 × 20,000 = 60,000 people.
PTA PTA Data Interpretation and Analysis 1
A bar chart shows sales of 40 in January, 60 in February, and 50 in March.
What is the average monthly sales?