Eight instances of a worker doing a task were observed as follows: $$\begin{array} { l r r r r r r r r }
\text { Observation } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \
\hline \text { Time (seconds) } & 17 & 18 & 15 & 14 & 13 & 15 & 16 & 12
\end{array}$$ How many observations would be needed to be 95.44 percent confident that the maximum error in the observed time is one second? Assume that the standard deviation of the task time is two seconds.

Question

Eight instances of a worker doing a task were observed as follows: $$\begin{array} { l r r r r r r r r } 
\text { Observation } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \
\hline \text { Time (seconds) } & 17 & 18 & 15 & 14 & 13 & 15 & 16 & 12
\end{array}$$ How many observations would be needed to be 95.44 percent confident that the maximum error in the observed time is one second? Assume that the standard deviation of the task time is two seconds.

Quizplus · Accepted Answer

The Answer of Eight instances of a worker doing a task were observed as follows: $$\begin{array} { l r r r r r r r r } 
\text { Observation } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \
\hline \text { Time (seconds) } & 17 & 18 & 15 & 14 & 13 & 15 & 16 & 12
\end{array}$$ How many observations would be needed to be 95.44 percent confident that the maximum error in the observed time is one second? Assume that the standard deviation of the task time is two seconds.

Eight Instances of a Worker Doing a Task Were Observed