A quality technician has collected data on the count of rivet nonconformities in four-meters travel trailers. After 30 trailers, the total count of nonconformities is 316. Trial control limits have...

A quality technician has collected data on the count of rivet nonconformities in four-meters travel trailers. After 30 trailers, the total count of nonconformities is 316. Trial control limits have been determined and a comparison with the data shows no out-of-control points. What is the recommendation for the central line and the revised control limits for a count of nonconformities chart?