HISTOGRAM
Most simple graph
What is a histogram used for
In statistics a histogram is a graphical representation of the distribution of data
How to create one
- Using a ruler, draw out the basic axes. These are the vertical and horizontal lines that form basic outline of the histogram
- Measure out the groups. so you'll need to make set marks along your lower axis
- Measure out the vertical axis. The vertical axis in a histogram is always for frequency. What measure of time is necessary, though, is up to your data of course
PROS & CONS
PROS: Good for helping you get an understanding of the distribution of data
CONS: Pick the wrong groupings and it can change the way you see the data. May want to try multiple groupings/categories.
FEATURES
Generally a histogram will have bars of equal width, although this is not the case when class intervals vary in size. Choosing the appropriate width of the bars for a histogram is very important. As you can see in the example above, the histogram consists simply of a set of vertical bars. Values of the variable being studied are measured on an arithmetic scale along the horizontal x-axis