From the Data Given Here Compute $$\begin{array} { r } X \\\hline 10 \\8 \\7 \\6 \\4\end{array}$$

Essay

From the data given here compute:
$$\begin{array} { r } X \\\hline 10 \\8 \\7 \\6 \\4\end{array}$$
a. $\sigma$ by the deviation method.
b. $\sigma$ by the raw-score method.
c. $\hat { S }$ by the deviation method.
d. $\hat { S }$ by the raw-score method.
e. the range.