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.
There are aftermarket trailer hitches for your vehicle rated at 3,500 lbs. I have a 2014 equinox 4 cylinder 6 speed wondering how much weight I can haul thanks. Hello Rick, You towing capacity is 9,600 lbs. so the gross trail weight you can pull will be 9,600 lbs.