Statistics: Making sense of data : 2.2 Examining Relationships Between Two Categorical Variables

Examining Relationships Between Two Categorical Variables

1. Distribution = the pattern of values in the data for that variable, showing the frequency of occurrence of the values relative to each other

2. Categorical variable = this is given by the frequencies of relatives frequencies of the observation for each of the categories of the variable.

3. Joint distribution = the frequency or relative frequency of the observattions for the two variables considered together as a combination.
  = Contingency table or Cross-tabulation or Two-way table

4. Marginal distribution = the distribition of only one of the variables in a contingency table.
   => we can say the total column on the chart is the marginal disribution.

5. Conditional distribution = of a categorical variable is its distribution within a fixed value of a second variable.