This page would contain resource information like a glossary of terms from the section, key equations, and a reminder of concepts that were covered.
Essential Concepts
- Pie charts are useful for showing percentages (parts of a whole) at some particular instance in time.
- Contingency tables (two-way tables) can be used to create stacked and side-by-side bar charts. This is beneficial as a contingency table does not present a strong visual comparison between groups.
- Technology is most helpful in studying and comparing the distributions of categorical variables for different populations or groups.
- Statistical questions about different populations or groups are answered by using stacked and side-by-side bar charts to compare data distributions.
Key Equations
- Relative change
C =[latex]\dfrac{\lvert x_{2} - x_{1} \rvert}{x_{1}}[/latex], where C is the relative change, x1 is the initial value, and x2 is the final value.
Glossary
- stacked bar chart
- a chart in which two different categorical variables are compared in bars that are stacked on top of one another.
- side-by-side bar chart
- a chart in which two different categorical variables are compared in bars that are placed beside one another.
- contingency table (two-way table)
- a table that displays the results of two categorical variables simultaneously.
- variable of interest
- a measurable variable that changes in an experimental observation.
- group of interest
- the group from which data is collected. This can sometimes be referred to as the sample.
- population
- the entire group of individuals from which information is collected.
Put formal DCMP I Can statements to prepare for the self-check.
These I Can Statements are new (the first one is the “you will understand” rephrased as an I Can):
- I can use tools in studying and comparing the distributions of categorical variables for different populations or groups.
- I can use technology to create stacked and side-by-side bar charts from two-way tables.
- I can use technology to create stacked and side-by-side bar charts from datasets.
- I can use stacked and side-by-side bar charts to compare and answer statistical questions about different populations or groups.
