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HomeCXC CSEC MathematicsStatistics: Measures of spread (range, interquartile range) and cumulative frequency curves
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Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves
Practice Questions

20 CXC CSEC Mathematics questions on Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves.

Try 2 sample questions on Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves

Question 1 · 1 mark · Difficulty 1/3

A teacher in Barbados recorded the test scores of 40 students. From a cumulative frequency curve, she found that the lower quartile is 42 and the upper quartile is 68. Calculate the interquartile range.

  1. 110
  2. 26
  3. 55
  4. 34
Show answer & explanation
✓ Answer: B26
Award 1 mark for correct calculation: IQR = Q₃ − Q₁ = 68 − 42 = 26. A is incorrect — this adds the quartiles instead of subtracting. C is incorrect — this calculates the mean of the quartiles. D is incorrect — calculation error.
Question 2 · 1 mark · Difficulty 1/3

A farmer in St. Vincent recorded the mass, in kg, of 50 pumpkins harvested from his field. The smallest pumpkin had a mass of 2.3 kg and the largest had a mass of 8.7 kg. What is the range of the masses?

  1. 6.4 kg
  2. 8.7 kg
  3. 11.0 kg
  4. 5.5 kg
Show answer & explanation
✓ Answer: A6.4 kg
4 kg. Award 1 mark for correct calculation: Range = largest value − smallest value = 8.7 − 2.3 = 6.4 kg. B is incorrect — this is only the maximum value, not the range. C is incorrect — this adds the values instead of subtracting. D is incorrect — calculation error.
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CXC CSEC Mathematics: Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves FAQ

How many CXC CSEC Mathematics questions on Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves for CXC CSEC Mathematics, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Mathematics?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves practice with other Mathematics topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves questions aligned to the official CXC CSEC Mathematics syllabus?
Every question is written against the published CXC CSEC Mathematics specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves typically tested on CXC CSEC Mathematics papers?
Statistics: Measures of spread (range, interquartile range) and cumulative frequency curves appears across multiple question types on real CXC CSEC Mathematics papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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