A Chi-square test is used to test the test of independence between rows and columns, contingency tables. It is a test related to frequencies. The observed frequency is a given statistical frequency known as the actual frequency, the expected frequency is known as the theoretical frequency is derived from the study by using the sum total of the row and total in the column divided by their corresponding sample size.
Two figures are said to be congruent when they have the same shape and size or if one object is a mirror image of the other object. The sides AB and BC are congruent when they have equal lengths of the sides. An isosceles triangle two sides are equal in length.
