Are useful for showing gaps, clusters, and outliers in distributions.

2. Bar graphs

Here we use bars to compare frequencies of possible data values.

3. Double bar graphs

Here we use two sets of bars to compare frequencies of data values between two levels of data (e.g. boys and girls)

4. Histograms

We use bars to show how frequently data occur within equal spaces within an intervals.

5. Stick Plots

We use sticks or skinny bars to compare frequencies among many data values.