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12MAI DATA DISPLAY. Box and Whisker. Length = the spread of the data: how variable/changeable/different the values are. Interquartile range is the length of the box. The middle line is the median which measures central tendency and the further up the scale the bigger the values on average.
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Box and Whisker • Length = the spread of the data: how variable/changeable/different the values are. • Interquartile range is the length of the box. • The middle line is the median which measures central tendency and the further up the scale the bigger the values on average.