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Stats 5.1.3. Measures of Variation

A Level Mathematics 9709 Examinations 2023 – 2025 Statistics and Probability 1

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4. Coded data

The variance for coded and uncoded data is the same! Just think simply.

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The formulae look like a lot but if you look at the last formula, it basically means that variation of coded and uncoded data is the same, calculated in the same way. No need to ‘re-convert’ at the end.

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