Process quality control is measured by sampling 10 items each day over a seven-day period. The overall mean of the items sampled is 9.3" with a standard deviation of 2.1." What is the standard error of the process?

Assuming a Z-score of 1.96, what are the upper and lower control limits for the process?

The goal is for the item to be 9" with an acceptable tolerance of 0.5." What are Cp and Cpk?

A new manufacturing method is introduced. It takes 200 seconds to make the first item and they expect to be on an 80% learning curve. How long will it take to make the 25^th item?

A second new method is introduced. It takes only 180 seconds to make the first item and 30 seconds for the 150^thitem. What is b in their learning curve formula?

A third new method takes 220 seconds for the first item and 120 seconds for the 400^th item. What is the rate of learning?