Intro to types of variables: numerical (quantitative) or categorical (qualitative):

• Explanation:
• Khan video: Individuals, variables, and categorical & quantitative data
• Practice Problems:
• Khan exercise: Individuals, variables, and categorical & quantitative data

4.2.1 Creating and Interpreting Frequency Distribution

• Explanation:
• Khan video: Two-way frequency tables and Venn diagrams 
• Khan Article: Two-way frequency tables
• Article: Over 40 Million People Are Enslaved Worldwide
• Survey: https://www.isidewith.com/political-quiz#
• http://www.rasmussenreports.com/
• http://www.pewresearch.org/topics/polling/
• Video on visualizing numbers: The Fallen of World War II in war deaths on Vimeo (18:16)
• Practice Problems:
• Khan Exercise: Read two-way frequency tables 
• Khan Exercise: Create two-way frequency tables (you may want to make your own table with the totals in the margins)
• Worksheet

• Explanation:
• Exercise
• Khan exercise: Marginal distributions
• Worksheet 

• Explanation:
• Khan video: Two-way relative frequency tables (he calls it a column relative frequency instead of a relative conditional) 
• Khan article: Two-way relative frequency tables and associations
• Khan article: Conditional distributions and relationships
• Khan video: Marginal and conditional distributions
• Article: Distribution of professional athletes
• Exercise:
• Khan exercise: Create two-way relative frequency tables
• Khan exercise: Reading two-way relative frequency tables
• Khan exercise: Interpreting two-way tables
• Khan exercise: Conditional distributions
• Worksheet