Box And Whisker Plot And Skewness. The box-and-whisker plot also known simply as the box plot is useful in visualizing skewness or lack thereof in data. A box plot also known as box and whisker plot is a type of chart often used in descriptive data analysis to visually show the distribution of numerical data and skewness by displaying the data quartiles or percentiles averages.
To read a box plot lets step through the various markings. The box upper and lower edges hinges are bound the interquartile range the middle half of the data from the 25th percentile to the 75th percentile of the data set. Section below for another type of box plot.
The median is shown by the horizontal line drawn through the box.
The box upper and lower edges hinges are bound the interquartile range the middle half of the data from the 25th percentile to the 75th percentile of the data set. Sketch the box and whisker plot for each of these data sets. The median can also be indicated by dividing the box into two. Here is the same data as a basic box plot.
