Math Dictionary / Joint Frequency
Joint Frequency
Joint frequency is the number of data values that fit two categories at the same time.
StatisticsGrade 8Algebra 1GEDSATACT
What it means
In a two-way table, a joint frequency is usually one of the inside cells.
Also called: two-way table count
Examples
| Students who chose math and also chose morning class |
| People who own a bike and also commute to school |
| Dogs that are small and adopted |
Common mistake
Do not use the row or column total when the question asks for the joint frequency.
Try one
Question: In a two-way table, where are joint frequencies usually found?
Show answer
They are usually found in the inside cells, not the totals.