Select all that apply When is the nonrandom variation shown on a control chart a positive outcome? Multiple select question. An observation above the upper control limit on a p-chart. An observation below the lower control limit on a c-chart. An observation below the lower control limit on a R-chart. An observation above the upper control limit on a R-chart. An observation below the lower control limit on a p-chart. An observation above the upper control limit on a c-chart