Sample 1 2 3 4 5 6 TUBE NUMBER 1 2 4.98 4.33 4.89 4.24 4.87 4.13 4.34 4.22 4.77 4.18 4.13 4.14 3 4.02 4.08 4.91 4.83 4.92 4.11 4 4.94 4.51 4.04 4.05 4.99 4.13 5 4.44 4.41 4.00 4.90 4.10 4.14 6 4.68 4.28 4.89 4.16 4.81 4.12 7 4.81 4.09 4.93 4.97 4.14 4.13 8 4.96 4.35 4.75 4.10 4.90 4.15 9 4.11 4.16 4.09 4.07 4.88 4.14 a. Assume that only six samples are sufficient, develop the control charts for the mean and the range. b. Plot the observations on the control chart and comment on your findings. Is the process in statistical control? c. If the company's requirements for each tube to be acceptable for retail sale must be 4.7 ounces. Is the production process under control? What action needs to be taken?

a. Assume that only six samples are sufficient, develop the control charts for the mean and the range. b. Plot the observations on the control chart and comment on your findings. Is the process in statistical control? c. If the company's requirements for each tube to be acceptable for retail sale must be 4.7 ounces. Is the production process under control? What action needs to be taken