Ononot — For the ordered dataset: 12, 15, 18, 21, 24, 27, 30, 33, 36

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Descriptive Statisticsmedium

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For the ordered dataset: 12, 15, 18, 21, 24, 27, 30, 33, 36

The interquartile mean is the mean of all values between $Q_1$ and $Q_3$ (inclusive). Find it using the position formula $\text{Position} = 0.25(n+1)$ and $0.75(n+1)$ .