BSEP Data Interpretation and Graphs 5 — Questions and Answers
Question 1: A line graph tracks a company's monthly profit from January through June. The line goes down from April to May. What does a downward slope between two points on a line graph mean?
- The value stayed the same
- The value increased
- The value decreased (Correct answer)
- The value doubled
Correct answer: The value decreased
A downward slope means the quantity on the y-axis decreased from one point to the next.
Question 2: A stacked bar graph shows the number of male and female employees in three departments. The HR bar is 60 units tall: the male segment is 25 units. How many female employees are in HR?
- 25
- 30
- 35 (Correct answer)
- 40
Correct answer: 35
Female employees = total bar height − male segment = 60 − 25 = 35.
Question 3: A data set has the values: 10, 15, 15, 20, 100. Which measure of central tendency is most affected by the outlier 100?
- Mode
- Median
- Mean (Correct answer)
- Range is not a measure of central tendency
Correct answer: Mean
The mean adds all values including the outlier before dividing, so extreme values pull it up or down significantly.
Question 4: A pie chart shows transportation preferences for 200 surveyed students. The 'Bus' slice is 25%. How many students prefer the bus?
- 25
- 40
- 50 (Correct answer)
- 75
Correct answer: 50
25% of 200 = 0.25 × 200 = 50 students.
Question 5: A bar graph shows the number of books read by students in a class. The bars for Mon–Fri show: 5, 8, 6, 9, 7. What is the median number of books read?
- 6
- 7 (Correct answer)
- 8
- 9
Correct answer: 7
Arranging in order: 5, 6, 7, 8, 9 — the middle value (median) is 7.
Question 6: A scatter plot has no clear pattern — the points are scattered randomly in all directions. What does this suggest about the two variables?
- Strong positive correlation
- Strong negative correlation
- Little or no correlation (Correct answer)
- Perfect correlation
Correct answer: Little or no correlation
When points show no discernible trend, there is little or no correlation between the two variables.
Question 7: A frequency table shows test score ranges and the number of students in each range. The range 80–89 has a frequency of 12 out of 40 total students. What percentage of students scored in the 80–89 range?
- 25%
- 28%
- 30% (Correct answer)
- 32%
Correct answer: 30%
12 ÷ 40 = 0.30 = 30%.
BSEP Data Interpretation and Graphs 5
A line graph tracks a company's monthly profit from January through June.
The line goes down from April to May.
What does a downward slope between two points on a line graph mean?