![]() The generated boxplot figure of the example on the left with no outliers.Ī series of hourly temperatures were measured throughout the day in degrees Fahrenheit. Examples Example without outliers Figure 5. Other kinds of box plots, such as the violin plots and the bean plots can show the difference between single-modal and multimodal distributions, which cannot be observed from the original classical box-plot. IQR = Q 3 − Q 1 = q n ( 0.75 ) − q n ( 0.25 ) for both whiskers. ![]() Interquartile range (IQR) : the distance between the upper and lower quartiles.In addition to the minimum and maximum values used to construct a box-plot, another important element that can also be employed to obtain a box-plot is the interquartile range (IQR), as denoted below: Third quartile ( Q 3 or 75th percentile): also known as the upper quartile q n(0.75), it is the median of the upper half of the dataset.First quartile ( Q 1 or 25th percentile): also known as the lower quartile q n(0.25), it is the median of the lower half of the dataset. ![]() Median ( Q 2 or 50th percentile): the middle value in the data set. ![]()
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