![]() ![]() These plots contain the range, interquartile range, median, lower value, upper value, lower quartile and upper. Upper half of scores in Physics (in Bold): 30, 45, 68, 70, 78, 83, 85ħ8 and 83 are the third quartiles in Maths and Physics respectively (there is 1 data point both above and below). Box-and-whisker plots are a really effective way to display lots of information. ![]() Upper half of scores in Maths (in Bold): 35, 42, 56, 66, 71, 78, 91 A box and whisker plot is defined as a graphical method of displaying variation in a set of data. The Third (Upper) Quartile is the midpoint of the upper half of our data. Lower half of scores in Physics (in Bold): 30, 45, 68, 70, 78, 83, 85Ĥ2 and 45 are the first quartiles in Maths and Physics respectively (there is 1 data point both above and below) The First (Lower) Quartile is the midpoint of the lower half of our data. Ħ6 and 70 are the median values in Maths and Physics respectively (there are 3 data points both above and below these values). The median is the point at which there are an equal number of data points whose values lie above and below the median value. Now let us find the median, the first (lower) quartile and the third (upper) quartile To understand how a Box and Whisker chart is constructed, we have to first arrange our data in ascending order. Ĭheck out live examples of Box and Whisker Chart in our charts gallery and JSFiddle gallery. The Box and Whisker consists of two partsâthe main body called the Box and the thin vertical lines coming out of the Box called Whiskers. What is Box and Whisker Plot Box and Whisker Plot is defined as a visual representation of the five-point summary.
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