Interpreting Summarizing Displays

Read Question—requires the respondent to read information from the table to determine a solution—important but lower level

Derive Question—requires some type of computation involving information read from a table

Interpret Question—requires an extension, prediction, or inference to read beyond the data—higher level thinking

***All three are important

Use 4th grade CRCT scores to provide examples

Work through #7 on p. 41

Measurement Variables

Leaping Frogs Activity

Use dot plot (p. 43) to discuss 6 key features:

1. Center
2. Variability (p. 44)—refers to the spread of that data
3. Shape—how the graph is skewed
4. Peaks/Clusters
5. Outliers
6. Granularity

Create other graphs for Quantitative Data—leaping frog

Stem-and-Leaf Plot (or Stem plot)—p. 46

Grouped frequency table—p. 57

Histogram—p. 58

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

·        Construct a side-by-side stem-plot (aka—back-to-back stem-plot)—p. 49

·        Use Fathom—click on bar graph—also split graph by gender

Statistical tendency—a rule that is true in general but there are exceptions

EX: males are usually taller than females, but there are exceptions

Use data from Personal Information Questionnaire to create a side-by-side stem-plot and answer the question.