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Introduction to Contingency Tables definitions

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  • Contingency Table
    A grid summarizing frequencies for two categorical variables, with cells representing combinations of categories.
  • Categorical Variable
    A variable with distinct groups or categories, such as grade level or driving status, used in frequency analysis.
  • Frequency
    The count of responses or occurrences for a specific category or combination in a dataset.
  • Cell Frequency
    The value in a table cell indicating the number of cases for a particular pair of categories.
  • Row Total
    The sum of frequencies across all columns for a specific row, representing the total for one category.
  • Column Total
    The sum of frequencies across all rows for a specific column, representing the total for one category.
  • Grand Total
    The overall sum of all frequencies in a table, representing the total number of responses.
  • Marginal Probability
    The likelihood of a single category, calculated using the category total divided by the grand total.
  • Joint Probability
    The chance of two events occurring together, found by dividing a cell frequency by the grand total.
  • Conditional Probability
    The probability of one event occurring given another has already happened, using a cell frequency and a row or column total.
  • Intersection
    The point in a table where two categories meet, representing cases belonging to both.
  • Category Total
    The sum of frequencies for all cases within a single category, found in row or column totals.
  • Survey
    A method of collecting data from individuals, often used to gather categorical information for analysis.
  • Probability
    A measure of how likely an event or category is, expressed as a ratio or percentage based on table data.