Eight Instances of a Worker Doing a Task Were Observed

question 18

Short Answer

Eight instances of a worker doing a task were observed as follows: $$\begin{array} { l r r r r r r r r } \text { Observation } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\\hline \text { Time (seconds) } & 17 & 18 & 15 & 14 & 13 & 15 & 16 & 12\end{array}$$ If the person observed worked at a pace that is 80 percent of normal, what should be the normal time for this task?