1. what is the upper limit ?

2. what is the center line ?

3. what is the lower limit ?

A quality inspector took six samples, each with twenty observations, of the weight of a bagging process, in pounds. The sample means and ranges are shown below. Use this information to obtain a three-sigma control chart (z=3) for the mean weight. Process standard deviation is 0.27 . Use that control chart to answer the questions below. Do not round intermediate calculations. Round your final answers to three decimal points