Referring to Problem 6, suppose the process remained in
control for the next 40 hours. The thickness measurements for hours 41 through
43 are as follows:
b. Was it necessary to obtain your answer to Problem 15
before part a could be answered? Explain your reasoning.
Referring to the process control charts developed in Problem
5, data for periods 31 to 40 are contained in the file Grandfoods-Extra.
a. Based on these data, what would you conclude about the
energy bar process?
b. Write a report discussing the results, and show the
control charts along with the new data.