A Brake and Muffler Shop Reported the Repair Bills, in Dollars

Essay

A brake and muffler shop reported the repair bills, in dollars, for their customers yesterday. $$\begin{array} { | l | l | l | l | l | } \hline 88 & 283 & 312 & 290 & 172 \\\hline 154 & 400 & 381 & 346 & 181 \\\hline 203 & 118 & 143 & 252 & 227 \\\hline 56 & 192 & 292 & 213 & 422 \\\hline\end{array}$$
a. Sketch a histogram for these data.
b. Find the mean and standard deviation of the repair costs.
c. Is it appropriate to use the mean and standard deviation to summarize these data? Explain.
d. Describe the association of repair costs.