Janie Hochevar, director of production at the center, has decided to record the number of defective labels in random daily samples on control charts. Janie estimates that 1.5 percent loose labels is typical when the labeling process is in control.
Twelve daily samples, each consisting of 200 pairs of jeans, were selected and examined. The number of defective labels found in each sample is shown below.

a. Determine the center line and the 3s control limits for the p chart.
b. Decide if the labeling operation is in control.

Question

Janie Hochevar, director of production at the center, has decided to record the number of defective labels in random daily samples on control charts. Janie estimates that 1.5 percent loose labels is typical when the labeling process is in control.
Twelve daily samples, each consisting of 200 pairs of jeans, were selected and examined. The number of defective labels found in each sample is shown below.
  
a. Determine the center line and the 3s control limits for the p chart.
b. Decide if the labeling operation is in control.

Quizplus · Accepted Answer

The Answer of Janie Hochevar, director of production at the center, has decided to record the number of defective labels in random daily samples on control charts. Janie estimates that 1.5 percent loose labels is typical when the labeling process is in control.
Twelve daily samples, each consisting of 200 pairs of jeans, were selected and examined. The number of defective labels found in each sample is shown below.
  
a. Determine the center line and the 3s control limits for the p chart.
b. Decide if the labeling operation is in control.

Janie Hochevar, Director of Production at the Center, Has Decided