Quartiles & Extremes
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Quartiles & Extremes (displayed in a Box-and-Whisker Plot). Lower Extreme. Lower Quartile. Median. Upper Quartile. Upper Extreme. Back. Interquartile Range (IQR). Lower Extreme. Definition: Lowest number in the data set Location on a box-and-whisker plot: End of left whisker

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Quartiles extremes displayed in a box and whisker plot

Quartiles & Extremes

(displayed in a Box-and-Whisker Plot)

Lower Extreme

Lower Quartile

Median

Upper Quartile

Upper Extreme

Back



Lower extreme
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


Lower quartile
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


Median
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


Upper quartile
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


Upper extreme
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


Interquartile range iqr1
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

195

520-325 = 195