Contingency table

A contingency table is like a special kind of chart that tells us how many things belong in different groups. Imagine you have some different colored candies that you want to group by their color and how many of each color there are.
So, you take your candies and mark down how many of each color you have in two different columns.
The rows represent one category, like the colors, and the columns represent another category, like the number of candies of each color.
Now you have a contingency table that shows how many candies are in each color group. You can use this table to compare the number of candies in each color, or see which color is the most popular.
Contingency tables are used in lots of different fields to help us categorize things and make comparisons.