The learner interprets categorical data represented in simple picture graphs, tally charts, or bar graphs and identifies the category with the greatest frequency as most common and the category with the smallest frequency as least common. This includes comparing counts within a small data set, recognizing when two or more categories tie for most or least common, and distinguishing the category name from the number of objects or responses it represents.
A category is the name of a group, such as a color or animal. The frequency is how many objects or responses are in that group.
To find the most and least common categories:
Example
Each square represents 1 student’s favorite color.
| Color | Picture graph | Count |
|---|---|---|
| Red | ■ ■ ■ ■ | 4 |
| Blue | ■ ■ | 2 |
| Green | ■ ■ ■ ■ | 4 |
| Yellow | ■ ■ | 2 |
First, compare the counts: , , , and .
Remember: Red, green, blue, and yellow are the category names. The numbers and tell how many students chose each color.
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