ISAT - International Student Admissions Data Interpretation: Graphs/Tables 2 — Questions and Answers
Question 1: A bar chart shows annual rainfall (mm) for City A: 2020=850, 2021=920, 2022=780, 2023=1050, 2024=890. What was the percentage change in rainfall from 2022 to 2023?
- 25.6%
- 34.6% (Correct answer)
- 27.0%
- 30.1%
Correct answer: 34.6%
Percentage change = (1050 - 780) / 780 x 100 = 34.6%.
The calculation: (1050 - 780) / 780 x 100 = 270/780 x 100 = 34.62%. This represents a significant year-over-year increase.
Question 2: A table shows enrollment: Engineering=1200, Business=980, Arts=650, Science=1100, Medicine=430. What percentage of total enrollment is Science and Engineering combined?
- 52.7% (Correct answer)
- 48.3%
- 55.1%
- 50.5%
Correct answer: 52.7%
Total = 4360. Science + Engineering = 2300. Percentage = 2300/4360 x 100 = 52.7%.
Total: 1200+980+650+1100+430 = 4360. Combined: 1100+1200 = 2300. Percentage: 2300/4360 x 100 = 52.75%.
Question 3: A line graph shows monthly sales ($000s): Jan=45, Feb=38, Mar=52, Apr=61, May=58, Jun=73. In which month did the largest absolute decline occur?
- February (Correct answer)
- May
- March
- April
Correct answer: February
Feb decline: 45-38=7. May decline: 61-58=3. February had the larger decline.
Only February (decline of 7) and May (decline of 3) showed decreases. February's decline was larger.
Question 4: A pie chart shows expenses: Salaries 42%, Rent 18%, Marketing 15%, R&D 12%, Other 13%. Total expenses are $2.4M. How much more is spent on Salaries than Marketing and R&D combined?
- $360,000 (Correct answer)
- $240,000
- $420,000
- $300,000
Correct answer: $360,000
Salaries = 42% = $1,008,000. Marketing+R&D = 27% = $648,000. Difference = $360,000.
The percentage difference is 42% - 27% = 15% of $2.4M = $360,000.
Question 5: Factory A: Morning=120, Afternoon=85, Night=45. Factory B: Morning=95, Afternoon=110, Night=65. Which factory has a higher proportion of night shift workers?
- Factory A with 18%
- Factory B with 24.1% (Correct answer)
- Both equal
- Factory A with 20%
Correct answer: Factory B with 24.1%
Factory A: 45/250=18%. Factory B: 65/270=24.1%. Factory B has a higher proportion.
Factory A total=250, night=18%. Factory B total=270, night=24.1%. Factory B has significantly more night workers proportionally.
Question 6: A scatter plot shows positive correlation between study hours and exam scores with r=0.85. One student studied 2 hours but scored 95%. What is this data point and what does r=0.85 indicate?
- An outlier; moderate positive correlation
- An outlier; strong positive correlation (Correct answer)
- A typical point; perfect correlation
- An anomaly; weak correlation
Correct answer: An outlier; strong positive correlation
The student deviates significantly from the trend (outlier). r=0.85 indicates strong positive correlation.
r=0.85 is in the strong range (0.7-1.0). A student scoring 95% with only 2 study hours dramatically deviates from the positive trend, making it an outlier.
ISAT - International Student Admissions Data Interpretation: Graphs/Tables 2
A bar chart shows annual rainfall (mm) for City A: 2020=850, 2021=920, 2022=780, 2023=1050, 2024=890.
What was the percentage change in rainfall from 2022 to 2023?