If the sample size is 45, then the degree of freedom is equal to
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 44
For a sample of size n (as in the one-sample t-test), the number of degrees of freedom is n − 1, because once the sample mean is fixed only n − 1 of the values can vary freely.
\( \displaystyle \nu=n-1=45-1=44 \)
CBSE Applied Mathematics (Class XII):
Inferential Statistics
