National 5 Statistical diagrams Drawing a bar graph for grouped data A combination of statistical information can be presented in diagrams. This involves constructing, interpreting and comparing ...

From the bar graph above, the main points are: Each bar has its own label on the horizontal axis There is a scale on the vertical axis The bars are of equal width ...

In fact, bar diagrams often include some further complications besides the clues themselves. Some entries may be unclued, for instance, or a transformation may need to be applied to some words ...