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What is it: A Contingency Table is a table that show the actual or relative frequency of two types of data at the same time in a table. Conditional Probabilities is the Event A, knowing that Event B has already occurred.
Why use it: A Contingency Table indicates the number of observations that are classified according to two variables. The intersection of Events A and B represents the number of instances where Events A and B occur at the same time. The probability of the intersection of two events is known as a "joint probability". The table will determine whether the variables are independent. How to use it: A Contingency Table shows the observed frequencies of two variables. An intersection of a row and column in a contingency table is know as a cell. A contingency table has r x c cells. Once the cells have been established a "Joint Probability test is conducted to determine the intersection of the two Events. Please refer to the template package for table layout and calculations of the "Joint Probability".
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