Fred conducts a study to look at the affect teenage smoking has on SAT scores at a local high school (n \( =25 \) ). The average participants' SAT score is 460 . The average population's SAT score is 500 and has a population's standard deviation of 100 . For this scenario, what is the:
\[
\begin{array}{l}
\mathrm{N}=\text { [Select] } \\
M=\text { [Select] }
\end{array}
\]
\[
\sigma=[\text { Select }]
\]
