To select the correct Studentʹs t-distribution requires knowing the degrees of freedom. How many degrees offreedom are there for a sample of size n?
A) $\mathrm { n } - 1$
B) $n$
C) $\mathrm { n } + 1$
D) $\frac { \bar { x } - \mu } { s / \sqrt { n } }$

Question

To select the correct Studentʹs t-distribution requires knowing the degrees of freedom. How many degrees offreedom are there for a sample of size n? 
A) $\mathrm { n } - 1$
B) $n$
C) $\mathrm { n } + 1$
D) $\frac { \bar { x } - \mu } { s / \sqrt { n } }$

Quizplus · Accepted Answer

The degrees of freedom for a sample of size n in the context of Student's t-distribution is $n - 1$. This is because one degree of freedom is lost when calculating the sample mean.

To Select the Correct Studentʹs T-Distribution Requires Knowing the Degrees n−1\mathrm { n } - 1n−1

To Select the Correct Studentʹs T-Distribution Requires Knowing the Degrees $\mathrm { n } - 1$