The stem and leaf plot is similar to a histogram or bar chart with
the exception that it allows a reader to get more precision when
reading the results.
Example
Let’s take a look at what stem and leaf plot
looks like and go over how they are constructed. The data used to construct the stem and leaf plot is as follows:
21, 22, 22, 24, 31, 31, 31, 35, 37, 43, 44, 46, 48, 48, 49, 52, 55,
55, 56, 67, 68, 68
Stem 
Leaves 
2 
1224 
3 
14457 
4 
346889 
5 
2556 
6 
788 
Multiply the stem by 10 and then add the leaf to the stem.

Let’s look at this in a little more detail, the first sample
point is equal to 21, therefore we enter a 2 under the stem side of
the plot and a 1 under the leaves side. Your plot should now look
like this.
Stem 
Leaves 
2 
1 
3 

4 

5 

6 

Multiply the stem by 10 and then add the leaf to the stem.

Multiply the stem by 10 and then add the leaf to the stem to get
the original value.
If we add the next data point (22) the plot will then look like
this.
Stem 
Leaves 
2 
12 
3 

4 

5 

6 

Multiply the stem by 10 and then add the leaf to the stem.

We continue this process for all the data points. We end up with
the stem and leaf plot we had at the beginning which looks like
this:
Stem 
Leaves 
2 
1224 
3 
14457 
4 
346889 
5 
2556 
6 
788 
Multiply the stem by 10 and then add the leaf to the stem.

This is just a simple example of a stem and leaf plot, you can
see that not only does this type of plot show the distribution of
the data but it also allows us to know precisely what data was
recorded. 