The Number of Hours a College Student Spent Studying During $$\begin{array} { | l | l | l | l | l | l | l | } \hline 7 & 6 & 4 & 9 & 8 & 5 & 10 \\\hline\end{array}$$

Essay

The number of hours a college student spent studying during the final exam week was recorded as follows: $$\begin{array} { | l | l | l | l | l | l | l | } \hline 7 & 6 & 4 & 9 & 8 & 5 & 10 \\\hline\end{array}$$ Compute the range, x, s² and s for these data. Express each number in appropriate units.