Degrees of Freedom

Without data for means, we can’t test the nearly normal condition so how many degrees of freedom do we need in order to proceed with our t test?

For a one sample t-test, the degrees of freedom is n-1, while for a two sample t test, we use the smaller of n1-1 or n2-1 if you don’t have a calculator. If you have a calculator, there is a different formula and we use what the calculator says.

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