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1 Explain the difference between a bar graph and a histogram.

2 Related to the previous question, why is it that in a bar graph, the bars are not allowed to touch each other?

3 Suppose you are about to get a test back in class. Before the teacher hands back your test, which histogram would you (and other students) prefer to see? Explain your choice.

4 Interpret the information it conveys.

5 In the previous question, why is it an example of a nonlinear relationship?

6 Why can’t we make a bar graph with scale data?

7 Why can’t we make a scatterplot with nominal data?