| Term 
 | Definition 
 
        | % of block/ width of block |  | 
        |  | 
        
        | Term 
 
        | Quantitative variables are |  | Definition 
 
        | numbers    ie: how many live in a house |  | 
        |  | 
        
        | Term 
 
        | Qualitative variables are |  | Definition 
 
        | answers that are categories      ie: gender, shift work, etc |  | 
        |  | 
        
        | Term 
 
        | What are two types of quantitative variables |  | Definition 
 
        | discrete (counting)  and continuous (measuring) |  | 
        |  | 
        
        | Term 
 
        | Areas of a block in a histogram are given as |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | The vertical axis is given as |  | Definition 
 
        | percent per unit of horizontal axis of a histogram |  | 
        |  | 
        
        | Term 
 
        | Where are the heights of the blocks located |  | Definition 
 
        | within parenthesis at the top of the  blocks |  | 
        |  | 
        
        | Term 
 
        | Percentages (denoted by areas) of classes in a histogram add up to |  | Definition 
 | 
        |  |