If a random sample of size n is taken from a normal population with a finite variance, then the statistic T = follows the t_df distribution with (n − 1) degrees of freedom, df.

Name: If a random sample of size n is taken from a normal population with a finite variance, then the statistic T = follows the t df distribution with (n − 1) degrees of freedom, df.
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Quizplus · Accepted Answer

This is the definition of the t-distribution.

If a Random Sample of Size N Is Taken from a Normal