Sub-topic 1
2025 · National One-Eighth
Free
Arithmetic mean of a set of measurements
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Sub-topic 2
2025 · National One-Eighth
Premium
Riddle: mean deviation as a measure of variation
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Sub-topic 3
2025 · National One-Eighth
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Average radius of three balls of $3$ mm (true/false)
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Sub-topic 4
2021 · National Preliminary
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Riddle: the interquartile range as a measure of spread
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Sub-topic 5
2024 · National Preliminary
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Riddle: the interquartile range as a measure of spread (second contest)
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Sub-topic 6
2024 · National One-Eighth
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Riddle: standard deviation as a measure of dispersion
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Sub-topic 7
2014 · National Final
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Riddle: the second quartile (median) dividing data into two equal halves
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Sub-topic 8
2022 · National Preliminary
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Properties of quartiles, deciles and percentiles (true/false)
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Sub-topic 9
2022 · National Preliminary
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Measures of location versus measures of dispersion (true/false)
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Sub-topic 10
2023 · National Preliminary
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Variance, mean deviation and mode: location versus dispersion (true/false)
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