b) If z = 3, what are the control limits for the mean chart? c) What are the control limits for the range chart? d. Based on the x overbar-chart, is one or more samples beyond the control limits?

Refer to Table 56.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n = 5) taken. The population process standard deviation is 1.36. 1 10 8 9 8 11 2 11 8 12 11 10 3 4 131 0 9 10 11 12 11 10 9 9 Samples 5 6 11 11 11 9 9 9 12 12 10 10 7 10 11 11 8 8 8 12 15 7 9 7 9 8 9 12 11 10 10 9 13 10 8 12 a) Standard deviation of the sampling means = ounces (round your response to three decimal places)