The main purpose is to summarise statistical data for fairly small sets of discrete data.
A double stem-and-leaf plot is also known as a back-to-back stem-and-leaf plot. Instead of there being a stem on the left side and its leaf on the right, the stem is in the middle, with a leaf on the right and a leaf on the left. It is used to compare sets of data. For example, the number of homeruns hit by National League teams vs. American League teams.
A scatter plot.A scatter plot.A scatter plot.A scatter plot.
If you have 2 sets of data, one that is independent and one that is dependent (I will assume this because relating two sets of unrelated data is useless), then you plot the independent on the x and the dependent on the y and assess how y changes in relation to x
A Back-To-Back Stem and Leaf Plot is a diagram to show two different sets of numbers. They are exactly like ordinary stem and leaf plot, but represents two different numbers by going out to the left as well as the right.
It shows the amount of the surveyed matter or other sets of data. They are good comparing sets of the data that just have an amount.
Comparing two sets of data.
you use it to compare 2 different sets of data
A scatter plot