STAB22 - Chapter 3 Flashcards

Question	Answer
Frequency table	Lists the categories in a categorical variable and gives the count of observations for each category.
Distribution	The distribution of a variable gives the possible values of the variable and the relative frequency of each value.
Area principle	Each data value should be represented by the same amount of data.
Bar chart	Show a bar whose area represents the count of observations for each category of a categorical variable.
Pie chart	Show how a whole divides into categories by showing wedges of the circle.
Contingency table	Displays counts of individuals falling into named categories on two or more variables. Used to reveal possible patterns.
Marginal distribution	The distribution of either variable alone.
Conditional distribution	The distribution considering only a smaller group of individuals.
Independence	Variables are independent if the conditional distribution of one variable is the same for each category of the other.
Segmented bar chart	Displays the conditional distribution of a categorical variable within each category.
Simpson's paradox	Relationships taken within different groups can appear to contradict relationships among the grand proportions.
Relative distribution	The proportion (frequency) divided by the total count.

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