Repair Bills an Automobile Service Shop Reported the Summary Statistics

Essay

Repair bills An automobile service shop reported the summary statistics shown for repair
bills (in $) for their customers last month. $$\begin{array} { | l | r | } \hline \text { Min } & 27 \\\text { Q1 } & 88 \\\text { Median } & 132 \\\text { Q3 } & 308 \\\text { Max } & 1442 \\\text { Mean } & 284 \\\text { SD } & 140 \\\hline\end{array}$$
a. Were any of the bills outliers? Show how you made your decision.
b. After checking out a problem with your car the service manager gives you an estimate of
"only $90." Is he right to imply that your bill will be unusually low? Explain briefly.