From the data below on the 600-yard walk-run test (time in seconds), calculate the standard deviation.
$$\begin{array} { | l | l | l | }
\hline \text { Group } X & f & \
\hline & & - \
\hline 266 - 280 & 5 & X = 160.69 \
\hline 251 - 265 & 17 & \
\hline 236 - 250 & 28 & \
\hline 221 - 235 & 33 & \
\hline 206 - 220 & 38 & \
\hline 191 - 205 & 67 & \
\hline 176 - 190 & 103 & \
\hline 161 - 175 & 164 & \
\hline 146 - 160 & 180 & \
\hline 131 - 145 & 151 & \
\hline 116 - 130 & 144 & \
\hline 101 - 115 & 66 & \
\hline 86 - 100 & 15 & \
\hline
\end{array}$$

Question

From the data below on the 600-yard walk-run test (time in seconds), calculate the standard deviation.
 $$\begin{array} { | l | l | l | } 
\hline \text { Group } X & f & \
\hline & & - \
\hline 266 - 280 & 5 & X = 160.69 \
\hline 251 - 265 & 17 & \
\hline 236 - 250 & 28 & \
\hline 221 - 235 & 33 & \
\hline 206 - 220 & 38 & \
\hline 191 - 205 & 67 & \
\hline 176 - 190 & 103 & \
\hline 161 - 175 & 164 & \
\hline 146 - 160 & 180 & \
\hline 131 - 145 & 151 & \
\hline 116 - 130 & 144 & \
\hline 101 - 115 & 66 & \
\hline 86 - 100 & 15 & \
\hline
\end{array}$$

Quizplus · Accepted Answer

The Answer of From the data below on the 600-yard walk-run test (time in seconds), calculate the standard deviation.
 $$\begin{array} { | l | l | l | } 
\hline \text { Group } X & f & \
\hline & & - \
\hline 266 - 280 & 5 & X = 160.69 \
\hline 251 - 265 & 17 & \
\hline 236 - 250 & 28 & \
\hline 221 - 235 & 33 & \
\hline 206 - 220 & 38 & \
\hline 191 - 205 & 67 & \
\hline 176 - 190 & 103 & \
\hline 161 - 175 & 164 & \
\hline 146 - 160 & 180 & \
\hline 131 - 145 & 151 & \
\hline 116 - 130 & 144 & \
\hline 101 - 115 & 66 & \
\hline 86 - 100 & 15 & \
\hline
\end{array}$$

From the Data Below on the 600-Yard Walk-Run Test (Time