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    IBMediumStatistics10–12

    For the data set \{2, 4, 5, 6, 8\}, what is the population standard deviation?

    Para o conjunto \{2, 4, 5, 6, 8\}, qual é o desvio padrão populacional?

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    Solution

    Mean = \frac{25}{5} = 5. Squared deviations: 9, 1, 0, 1, 9 \Rightarrow sum = 20. Variance = \frac{20}{5} = 4. Standard deviation = \sqrt{4} = 2.