A paired-samples t test is also known as a:

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A paired-samples t test is used to test for a significant difference between two related variables, such as before and after measurements. It is also known as a dependent-samples t test because the two measurements are dependent on each other. A single-subject t test is used when only one individual is being tested, a single-sample t test is used when comparing a sample mean to a known population mean, and a z test is used when the population standard deviation is known.

A Paired-Samples T Test Is Also Known as A