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Mean of box and whisker plot4/28/2024 These five numbers are median, upper and lower quartile, minimum and maximum data values which are also known as extremes. The box and whisker plot, which is also known as simply the box plot, is a type of graph that helps visualize the five-number summary. Now that we have recalled what is meant by median and quartile, let us learn what we mean by box and whisker plots. A particular quartile is a border between two neighbouring quarters of the distribution. Quartiles – A Quartile is a percentile measure that divides the total of 100% into four equal parts: 25%,50%,75% and 100%. If n is odd, then use the following formula – Median – The median of a group of observations is the value of the variable which divides the group of n numbers into two equal parts. Now before we move further and learn more about the box and whisker plots, we must first recall some important terms that are relevant to the understanding of the box and whisker plots. Tukey also considered an additional variation in which the outliers are indicated separately and whiskers are dashed, ending with dashed crossbars at “adjacent values”. He used extended the whiskers all the way to the extreme data points and drew an unfilled dot at the maximum along with a hatched horizontal strip at the minimum. For instance, Tukey’s original formulation did not have horizontal crossbars. However, the arrangement of the box and whisker that is in use today slightly varies from what was proposed by J Turkey. Using Box and Whisker Plots for Comparative AnalysisĪ box-and-whisker plot is a histogram like method of displaying data.Advantages of using Box and Whisker plots.
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