Compute the Range $\hat{ S }$ , And $\sigma$ For the Scores Below

Essay

Compute the range, $\hat{ S }$ , and $\sigma$ for the scores below. Use the deviation method for $\hat { S }$ and the raw-score method for $\sigma$ . Compute IQR. $$\begin{array} { l l } X & f \\\hline 4 & 1 \\3 & 4 \\2 & 1 \\1 & 2 \\0 & 2\end{array}$$