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.
The Range Rover Sport can tow up to 7,716 pounds, which is among the highest capacities for luxury midsize SUVs. Its few equals in towing capacity are the Volkswagen Touareg and big brother Land Rover Range Rover, while the Toyota Land Cruiser outclasses all three with its tow rating of 8,100 pounds.