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How do paired t-tests differ from unpaired t-tests?

In: Math and Arithmetic, Statistics [Edit categories]

Relevant answers:

What is a t-test?
a t test is used inplace of a z-test when the population standard deviation is unknown.
How does the formula for the t test differ from the formula for the z test?
When we use a z-test, we know the population mean and standard deviation. When we use a t-test, we do not know the population standard deviation and thus must estimate this using the sample data that...
Why a t-test is conducted?
we conduct a t-test to see if the means of two different populations are statistically different from each other.
When to use t-test?
You use the t-test when the population standard deviation is not known and estimated by the sample standard deviation. (1) To test hypothesis about the population mean (2) To test whether the means...
What is the T-Test formula?
t= absolute value of ( sample 1 - sample two) THEN DIVIDED by the (standard error of sample one - standard error of sample 2) standard error = the standard deviation divided by (square root of the...