QuestionSelect the appropriate word or phrase to complete the sentence.
The number of degrees of freedom for the Student's $t$-test of a population mean is always 1 less than the (Choose one) $\nabla$.

Studdy Solution
Recognize that the phrase to complete the sentence should relate to the sample size, as the degrees of freedom are calculated as the sample size minus one.
The appropriate word or phrase to complete the sentence is:
"sample size"
The completed sentence is:
The number of degrees of freedom for the Student's $t$-test of a population mean is always 1 less than the sample size.