Exercise $4-15($Algo$)($LO$4-4)$

Listed below are the commissions earned $($$$000)$ last year by a sample of $15$ sales representatives at Furniture Patch Inc.

$\backslash$table$[[$$$4\mathrm{.}0,$$$5\mathrm{.}8,$$$8\mathrm{.}1,$$$11\mathrm{.}4,$$$12\mathrm{.}8,$$$13\mathrm{.}6,$$$14\mathrm{.}1,$$$15\mathrm{.}0$