The First Graphs

First Up Graphs

The two most common graphs (these are acceptable for the numeracy standard 26626) are back to back stem and leaf graphs.  These show the numbers/data for two categories.

The trick here is to know how to read the numbers,  Can you see where the before number is 82 beats per min?

The benefits of the back to back stem and leaf graph is that you can easily see the spread of the data and make an quick comment.  "the pulse rates are generally lower (smaller numbers) in the before category.

You can also quickly find the highest, lowest, median numbers (and the quartiles).







The second most important graph to do is our dot plot graph.  These look like.