In a Probability Problem with Joint Probabilities, the Sum of All

question 32

Short Answer

In a probability problem with joint probabilities, the sum of all the joint probabilities must equal _______________.

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Definitions:

Contingency Tables

A type of table in a matrix format that displays the frequency distribution of the variables.

Qualitative Variables

Variables that express categorical, non-numeric information, such as gender, race, or type of living arrangement.

Test Statistic

A quantity derived from sample data that is used in a hypothesis test to make a decision about the null hypothesis.

Chi-Squared Table

A table that shows the critical values of the chi-square distribution, used to determine the significance of chi-square statistics.