What is a box and a whisker plot?
A box and whisker plot is defined as a graphical method of displaying variation in a set of data. In most cases, a histogram analysis provides a sufficient display, but a box and whisker plot can provide additional detail while allowing multiple sets of data to be displayed in the same graph.
Why is it called box and whisker plot?
In addition to the box on a box plot, there can be lines (which are called whiskers) extending from the box indicating variability outside the upper and lower quartiles, thus, the plot is also termed as the box-and-whisker plot and the box-and-whisker diagram.
Is a box and whisker plot considered a graph?
The box and whisker plot, sometimes simply called the box plot, is a type of graph that help visualize the five-number summary.
How do you find the box and whisker plot?
The length of the upper whisker is the largest value that is no greater than the third quartile plus 1.5 times the interquartile range. In this case, the third quartile plus 1.5 times IQR is 10 + 1.5*6 = 19. The largest value that is no greater than 19 is 13, so the upper whisker will reach to 13.
What is a parallel box plot?
Parallel box-and-whisker-plots are used to visually compare the five-number summaries of two or more data sets. The term ‘parallel box-and-whisker plots’ is commonly abbreviated to ‘parallel boxplots’.
What is the other term for box whisker plot?
Another name for a boxplot is a box-and-whisker plot, as the box contains the first quartile, median, and third quartile, and the whiskers are the lines extending to the minimum and maximum.
Who made the box and whisker plot?
John Wilder Tukey
It was invented in the 1970s by American statistician John Wilder Tukey.
How do you read a box and whisker plot in parallel?
At the ends of the box, you” find the first quartile (the 25% mark) and the third quartile (the 75% mark). The far left of the chart (at the end of the left “whisker”) is the minimum (the smallest number in the set) and the far right is the maximum (the largest number in the set).
How do you draw a box plot?
To construct a box plot, use a horizontal or vertical number line and a rectangular box. The smallest and largest data values label the endpoints of the axis. The first quartile marks one end of the box and the third quartile marks the other end of the box.