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

Multiple Choice

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) $\frac { \bar { x } - \mu } { s / \sqrt { n } }$