Garman observes a worker assembling peanut valves and records the data displayed in the table.What is the select time for this job element if the worker is rated at 80%?
$$\begin{array} { | c | c | }
\hline \begin{array} { c }
\text { Time } \
\text { (seconds) }
\end{array} & \text { Observations } \
\hline 20 & 15 \
\hline 25 & 12 \
\hline 30 & 12 \
\hline
\end{array}$$
A) 15 seconds
B) 20 seconds
C) 25 seconds
D) 30 seconds

Question

Garman observes a worker assembling peanut valves and records the data displayed in the table.What is the select time for this job element if the worker is rated at 80%?
$$\begin{array} { | c | c | } 
\hline \begin{array} { c } 
\text { Time } \
\text { (seconds) }
\end{array} & \text { Observations } \
\hline 20 & 15 \
\hline 25 & 12 \
\hline 30 & 12 \
\hline
\end{array}$$
A) 15 seconds
B) 20 seconds
C) 25 seconds
D) 30 seconds

Quizplus · Accepted Answer

To find the select time, we need to calculate the weighted average of the observations given, where the weight is the number of observations.

Weighted average select time = (20*15 + 25*12 + 30*12) / (15 + 12 + 12) = 25 seconds

Since the worker is rated at 80%, the standard time would be 0.8 * 25 = 20 seconds. Therefore, the best choice would be option B) 20 seconds, which is closest to the standard time.

Garman Observes a Worker Assembling Peanut Valves and Records the Data