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Published byBaldwin Sims Modified over 8 years ago

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Quartiles & Extremes (displayed in a Box-and-Whisker Plot) Lower Extreme Lower Quartile Median Upper Quartile Upper Extreme Back

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Interquartile Range (IQR)

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Lower Extreme Definition: Lowest number in the data set Location on a box-and-whisker plot: End of left whisker Example: 250, 325, 340, 390, 440, 520, 730

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Lower Quartile Definition: Median of the lower half of the data Location on a box-and-whisker plot: Left end of the box Example: 250, 325, 340, 390, 440, 520, 730

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Median Definition: Middle number when data is in order from least to greatest. Location on a box-and-whisker plot: Line inside of the box Example: 250, 325, 340, 390, 440, 520, 730

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Upper Quartile Definition: Median of the upper half of the data Location on a box-and-whisker plot: Right end of the box Example: 250, 325, 340, 390, 440, 520, 730

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Upper Extreme Definition: Highest number in the data set Location on a box-and-whisker plot: End of right whisker Example: 250, 325, 340, 390, 440, 520, 730

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Interquartile Range (IQR) Definition: Difference between the upper & lower quartiles Location on a box-and-whisker plot: Length of the box Example: 250, 325, 340, 390, 440, 520, 730 520-325 = 195 195

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