Topic 1.4 Measurement Variables

Leaping Frogs Activity

Use a dot plot to discuss 6 key features:

- center
- variability
- shape
- peaks/clusters
- outliers
- granularity

Other graphs for quantitative data (create with frog activity data)

- stem-and-leaf plot
- grouped frequency table
- histogram

Suppose I wanted to address the question, “Do boy frogs tend to leap farther than girl frogs?”

I would need to construct a side-by-side stem plot (AKA back-to-back stem plot)

Definition: Statistical Tendency—a rule that is true in general but there are exceptions.

Examples: Males are usually taller than females but not always

How Many Stars Activity