No, I don't think you should round the data.
The stems should probably be the numbers 13,14,15,...,19
Line them up like this with the leafs to the right
S L
13 |9
14 |8,9
15 |2,8
.
.
.
You can finish it.
Starting the stems with 1 would accomplish nothing here. You can order the data to begin with, the order shouldn't matter when doing stats.
okay thank you for your help but the number go from 132-645, how would i number it that far
It probably depends on how many you have. If you have say 30, then you might just keep going by tens. Otherwise you might try stems of every 100. There really is lot of room for experimenting here.
The first thing you might do is create a histogram to get some idea of how the data is distributed.
BTW, I think you mentioned this was a side-by-side display. Are you meaning the same thing as a back-to-back display?
In that kind of display we compare two sets of data. We put the stems down the middle and put the leaves on either side like this
L S L
1,0 1x 2,3
This would be the display if 10, 11 were in set A and 12,13 were in set B.
Does this make sense? Observe that the leaves for the set on the left are written in increasing order from right to left, while those on the right are increasing from left to right.
To number the data from 132-645, you can follow a similar approach to what was discussed earlier. Here's a suggestion:
1. Determine the range of the data: Subtract the smallest value (132) from the largest value (645) to get the range, which in this case is 513.
2. Decide on the interval or step size for the stems: You can choose an appropriate interval based on the size of your dataset. For example, if you have a large dataset, you might choose a larger step size like 50 or 100. If you have a smaller dataset, you might choose a smaller step size like 10 or 20. Let's use a step size of 50 in this example.
3. Determine the starting value for the stems: To start the stems, you can choose a value that is smaller than the smallest value in your data. For simplicity, let's choose a starting value of 100.
4. Generate the stems and assign the leaves: You can now generate the stems and assign the leaves to each stem. Starting with the chosen starting value, add the step size repeatedly until you reach a value that is larger than the largest value in your data. For each stem, list the corresponding leaves to the right. For example, if the stem is 100, and you have the data points 132 and 145, you would write "13 | 2, 4" next to the stem 100.
5. Continue this process until you have assigned all the data points to their corresponding stems.
Remember that the actual numbers for the stems and leaves will depend on your specific dataset, so adjust accordingly. Also, keep in mind that this is just one approach, and there are other strategies you can use to create stem-and-leaf displays.