Jon Weideman, first shift foreman for Cut$-$Rate Machining, Inc., is attempting to decide on a vendor from whom to purchase a drilling machine. He narrows his alternatives to four vendors: The Hole$-$Maker, Inc. $($HM$)$; Shafts & Slips, Inc. $($SS$)$; Judge's Jigs $($JJ$)$; and Drill$-$for$-$Bits, Inc. $($DB$).$ Each of these vendors is offering machines of similar capabilities at similar prices, so the effectiveness of the machines is the only selection criteria that Mr$.$ Weideman can use. He invites each vendor to ship one machine to his Richmond, Indiana manufacturing facility for a test. He starts all four machines at $8$ a$.$m$.$ and lets them warm up for two hours before starting to use any of the machines. After the warm$-$up period, one of his employees will use each of the shipped machines to drill $3-$centimeter$-$diameter holes in $25-$centimeter$-$thick stainless$-$steel sheets for two hours. The widths of holes drilled with each machine are then measured and recorded. The results of Mr$.$ Weideman's data collection are shown in the given data set.

Based on these results, from which vendor would you suggest Mr$.$ Weideman purchase his new machine?