Box plots characterize a sample using the 25th, 50th and 75th percentiles—also known as the lower quartile (Q1), median (m or Q2) and upper quartile (Q3)—and the interquartile range (IQR = Q3 ...

The interquartile range is the upper quartile – the lower quartile, so for this data the interquartile range is 47 - 38 =9. Back to top Drawing a box plot from a cumulative frequency ...

The upper fence is defined as the third quartile (represented by the upper edge of the box) plus 1.5 times the interquartile range (IQR). ... The following statements create a box plot with schematic ...

Box plots, also called box and whisker plots, are more useful than histograms for comparing distributions. ... from the 75 th percentile or 1.5 times the interquartile range ...

Whiskers extend from the quartiles to the farthest observation not farther than 1.5 times the distance between the quartiles (the interquartile range). Beyond the whiskers, extreme observations are ...

The box ranges from the first (Q1) to the third quartile (Q3) of the distribution and represents the interquartile range (IQR). A line across the box indicates the median.