The average of allsubgroups becomes the centerline for the lower plotting area. Average of Ranges Example Step 7 - Calculate the upper control limit (UCL) and lower control limit (LCL)for the averages of the subgroups. At this point, your chart will look like aRun Chart. Now, however, the uniqueness of the Control Chart becomes evidentas you calculate the control limits.
Ford Motor Company recommends that the Crown Vic limit its towing to a trailer with a gross vehicle weight of 1500 lbs or less with a tongue weight not to exceed 150 lbs. See HERE.
1500 pounds of towing power. 2013 Toyota Matrix â Sure, you can laugh but the 2013 Toyota Corolla sedan and Matrix wagon both boast a 1,500 pound tow rating that is higher than rivals like the Civic or Sentra.