Skip to main content
Back

Introduction to Contingency Tables quiz

Control buttons has been changed to "navigation" mode.
1/15
  • What is a contingency table used for?
    A contingency table is used to display the frequencies for two categorical variables, allowing for analysis of their relationship.
  • How do you identify the frequency of a specific combination in a contingency table?
    You find the cell at the intersection of the relevant row and column for the two categories.
  • What does a total row or column in a contingency table represent?
    A total row or column sums up the number of responses for a specific category across the other variable.
  • What is the grand total in a contingency table?
    The grand total is the sum of all responses in the table, found at the intersection of the total row and total column.
  • How do you calculate marginal probability from a contingency table?
    Divide the total for a single category (row or column total) by the grand total.
  • What type of probability is being asked if a question only mentions one category?
    It is asking for marginal probability.
  • How do you calculate joint probability using a contingency table?
    Divide the frequency in the cell where the two categories intersect by the grand total.
  • What word in a probability question often indicates joint probability?
    The word 'and' usually indicates a joint probability question.
  • What is conditional probability?
    Conditional probability is the probability of one event occurring given that another event has already occurred.
  • How do you calculate conditional probability from a contingency table?
    Divide the relevant cell frequency by the total of the given condition's row or column.
  • What keywords in a question suggest you should use conditional probability?
    Words like 'given,' 'assuming,' or 'if we know' suggest conditional probability.
  • If you want the probability that someone drives a car given they are a senior, what is your denominator?
    The denominator is the total number of seniors, which is the total for the senior row.
  • What is the difference between joint and conditional probability?
    Joint probability is the chance of two events both happening, while conditional probability is the chance of one event happening given the other has already occurred.
  • How do you recognize a marginal probability problem in a word problem?
    Marginal probability problems only ask about one category and do not mention the other variable.
  • Why are contingency tables useful in surveys and experiments?
    They help analyze relationships between variables, allowing for meaningful conclusions about the data.