Garman observes a worker assembling peanut valves and records the data displayed in the table.During one of the cycles,the worker knocked the shaft out of the fixture and had to realign the fixtures.What is the select time for this job element if the worker is rated at 80%?
$$\begin{array} { | c | c | }
\hline \begin{array} { c }
\text { Time } \
\text { (seconds) }
\end{array} & \text { Observations } \
\hline 20 & 15 \
\hline 25 & 12 \
\hline 30 & 12 \
\hline 240 & 1 \
\hline
\end{array}$$
A) Less than 23 seconds
B) Greater than or equal to 23 seconds but less than 26 seconds
C) Greater than or equal to 26 seconds but less than 29 seconds
D) Greater than or equal to 29 seconds

Question

Garman observes a worker assembling peanut valves and records the data displayed in the table.During one of the cycles,the worker knocked the shaft out of the fixture and had to realign the fixtures.What is the select time for this job element if the worker is rated at 80%?
$$\begin{array} { | c | c | } 
\hline \begin{array} { c } 
\text { Time } \
\text { (seconds) }
\end{array} & \text { Observations } \
\hline 20 & 15 \
\hline 25 & 12 \
\hline 30 & 12 \
\hline 240 & 1 \
\hline
\end{array}$$
A) Less than 23 seconds
B) Greater than or equal to 23 seconds but less than 26 seconds
C) Greater than or equal to 26 seconds but less than 29 seconds
D) Greater than or equal to 29 seconds

Quizplus · Accepted Answer

To find the select time, we look for the time that occurs most frequently in the observations. In this case, the time of 20 seconds occurs 15 times, which is the highest frequency, so the select time is 20 seconds. However, since the worker is rated at 80%, the effective select time is 20 seconds divided by 0.8, which equals 25 seconds. Since the observations also include a time of 25 seconds occurring 12 times and a time of 30 seconds occurring 12 times, we can reasonably assume that the select time falls between 23 seconds and 26 seconds. Therefore, the best choice is B) Greater than or equal to 23 seconds but less than 26 seconds.

Garman Observes a Worker Assembling Peanut Valves and Records the Data