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Stats Ch2
Term | Definition |
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Frequency Table | A table listing the categories in a categorical variable and gives the count of observations for each category. |
Relative Frequency Table | A table listing the categories in a categorical variable and gives the percentage of observations for each category. |
Distribution of a Variable | The possible values of each variable and the relative frequency of each value |
Area Principle | Data should be represented by the same amount of proportional area. |
Bar Chart | A chart in bar form whose area represents the count of observations for each category of a categorical variable. |
Relative Frequency Bar Chart | A chart in bar form whose area represents the percentage of observations for each category of a categorical variable. |
Pie Chart | A chart in which a circle representing the "whole" is divided into corresponding proportions for each category. |
Categorical Data Condition | Choosing the correct method for displaying and describing categorical data (not quantitative data). |
Contingency Table | A table displaying counts or percentages of individuals falling into categories on two ore more variables. |
Marginal Distribution | The distribution of either variable alone. Category Total/ Total Total |
Conditional Distribution | The distribution restricting the who to consider only a smaller group of individuals. Intersection of 2 Categories/Category Total |
Independence | When variables give roughly the same conditional distribution for each category of the other. |
Association | When we see evidence that one variable depends on another. |