Analysing Data

Analysing Data Quiz

Spec S4–S6 · AQA GCSE Maths: Quiz

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5 questions, one answer each

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1. What is the interquartile range if $Q_1 = 12$ and $Q_3 = 27$ ?
- A. A. $39$
- B. B. $15$
- C. C. $19.5$
- D. D. $27$
2. A histogram class has frequency 20 and class width 5. What is the frequency density?
- A. A. $100$
- B. B. $4$
- C. C. $0.25$
- D. D. $25$
3. What does a scatter graph with points scattered randomly, showing no clear pattern, indicate?
- A. A. Strong positive correlation
- B. B. Strong negative correlation
- C. C. No correlation
- D. D. Perfect correlation
4. Two classes' test scores are compared using box plots. Class X has a higher median but a much wider IQR than Class Y. What is the best interpretation?
- A. A. Class X scored better on average and was more consistent
- B. B. Class X scored better on average but was less consistent
- C. C. Class Y scored better on average
- D. D. The two classes performed identically
5. A scientist finds a strong positive correlation between ice cream sales and drowning incidents. What is the most appropriate conclusion?
- A. A. Ice cream causes drowning
- B. B. Drowning causes people to buy ice cream
- C. C. Correlation does not prove causation — a third factor, like hot weather, may explain both
- D. D. The data must be incorrect