There is an appropriate test to compare two averages when there are no groups such as male v.female.The test calculates differences between the averages of two different variables.

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The paired samples t-test (also known as the dependent samples t-test) is used to compare the means of two related groups or conditions, effectively handling situations where there are not distinct groups like male vs. female but rather two variables for the same group.

There Is an Appropriate Test to Compare Two Averages When