Values higher than Q3+1.5xIQR or lower than Q1-1.5xIQR are considered outliers and are plotted above the top whisker or below the bottom whisker. The ends of the whiskers are marked by two shorter horizontal lines. The vertical lines protruding from the box extend to the minimum and the maximum values of the data set, as long as these values are not outliers.
The horizontal line inside the box is the median. Therefore the vertical width of the central box represents the inter-quartile deviation. The bottom side of the box represents the first quartile, and the top side, the third quartile. The box plot is also referred to as box and whisker plot or box and whisker diagram Elements of the box plot
What is a box plotĪ box plot is a diagram that gives a visual representation to the distribution of the data, highlighting where most values lie and those values that greatly differ from the norm, called outliers. These measures are displayed to the left of the chart.For more details on the dispersion of the data set, you may click on the More dispersion data link located on the left of the plot. The other two values to remember are the lower quartile (LQ), which divides the lower 50 of the data points into two equally sized parts, and the upper. When you submit your data, the server calculates the measures that will be used to plot the diagram. To clear the graph and enter a new data set, press "Reset". What is a stem and leaf plot The stem and leaf plot is a plot used to represent numerical data by showing its distribution. Press the "Submit Data" button to create the plot.
#Stem and leaf plot explained pdf#
You may also copy and paste data from another window such as an open document, spreadsheet pdf file or another web page. You do not need to specify whether the data is from a population or a sample. They look very simple and can be used to display a huge set of data. Individual values may be entered on separate lines or separated by commas, tabs or spaces. Stem and leaf plots are a method of displaying data horizontally in two columns. You must enter at least 4 values to build the box plot. This page allows you to create a box plot from a set of statistical data:
0 kommentar(er)
