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Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-4024-ST3-0011 markL1 FoundationNon-calculatorMedian & quartiles
A cumulative frequency graph shows 120120 values. At what cumulative frequency should you read the lower quartile?

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST3-0021 markL1 FoundationNon-calculatorMedian & quartiles
A cumulative frequency graph shows 8080 values. At what cumulative frequency should you read the upper quartile?

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST3-0031 markL1 FoundationNon-calculatorPercentiles
A cumulative frequency graph shows 200200 values. At what cumulative frequency should you read the 9090th percentile?

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST3-0041 markL1 FoundationNon-calculatorMedian & quartiles
A cumulative frequency table shows ≤10\le10: 55; ≤20\le20: 1717; ≤30\le30: 3535; ≤40\le40: 4040. Find the frequency of the class 20<x≤3020<x\le30.

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST3-0051 markL1 FoundationNon-calculatorPercentiles
Using the table (≤10\le10: 55; ≤20\le20: 1717; ≤30\le30: 3535; ≤40\le40: 4040), how many values are greater than 3030?

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST3-0071 markL1 FoundationNon-calculatorMedian & quartiles
A set of data has lower quartile 2222 and upper quartile 3838. Find the interquartile range.

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST3-0091 markL1 FoundationCalculatorPercentiles
Why is the interquartile range often a better measure of spread than the range?
Choose one option

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST-Q031 markL1 FoundationCalculatorMedian & quartiles
On a cumulative frequency graph for 200200 values, the median is read at a cumulative frequency of
Choose one option

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST3-0062 marksL2 StandardCalculatorMedian & quartiles
Using the table (≤10\le10: 55; ≤20\le20: 1717; ≤30\le30: 3535; ≤40\le40: 4040) and straight lines between the points, estimate the median.

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST3-0081 markL2 StandardNon-calculatorPercentiles
Using the table (≤10\le10: 55; ≤20\le20: 1717; ≤30\le30: 3535; ≤40\le40: 4040), what percentage of the values are 2020 or less?

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST-0082 marksL3 ExamCalculatorMedian & quartiles
The cumulative frequencies of the marks of 8080 students are: ≤10\le10: 88; ≤20\le20: 2626; ≤30\le30: 5252; ≤40\le40: 7070; ≤50\le50: 8080. Joining the points with straight lines, estimate the median mark.

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Salam Academy Original Practice · Proposed mark scheme
SA-4024-ST-0093 marksL3 ExamCalculatorMedian & quartiles
Using the same cumulative frequencies (≤10\le10: 88; ≤20\le20: 2626; ≤30\le30: 5252; ≤40\le40: 7070; ≤50\le50: 8080) and straight lines between points, estimate the interquartile range.

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Salam Academy Original Practice · Proposed mark scheme