Activity 10.11: Custodial Times Data on die lengff oftime it takes custodians at a large urban school district to complete various tasks suggests a normal distribution with die following means and standard deviations (SD) a. d. mop a floor: mean = 12 minutes; SD = 2 minutes clean a lavatory: mean = Ig minutes; SD = 3 mmutes clean a classroom: mean = 8 minutes; SD = I minute empt-, trash containers: mean = 20 minutes; SD = 5 minutes wash windows in administratile offices: mean = 15 minutes; SD = minutes Due to budgetary cutbacks: the adtninistration has declded to release those custodians who fall in the following percentages completing at least three of the above-listed a. d. the bottom percent the bottom 10 percent the bottom 3 percent the bottom 15 percent the bottom 4 percent There are six custodians employed by the district Here are their times for completing each of the above-mentioned tasks _ Based on dlls infomaatlon: uilich custodians (If any) should be released? A. MOP FLOOR I I. 8 minutes I I minutes 13 minutes 13.9 minutes 15 _ 8 minutes 14 minutes B. CLEAN LAVATORY 19 minutes 17 _ 8 minutes 22 minutes 23.8 minutes 25 minutes 25 _ 4 mmutes C. CLEAN CIASSROOM 7 mmutes 9 _ 2 minutes I O minutes 9.8 minutes 10.1 minutes 12 mmutes TRASH 30 mmutes 33 minutes E. WASH 22 minutes 17 minutes 34.5 minute-1'.4 minutes 37 minutes 19 minutes 37.9 minutes 15 mmutes 20 mmutes 15 8 mmutes (Ctrl)