... 56.10 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 standard deviation is 1.36. 3 8 13 10 13 1 2 10 9 9 9 10 11 9 11 12 10 Samples 4 5 6 12 10 10 10 10 11 9 8 10 11 12 10 10 9 9 10 10 9 7 10 11 10 8 9 10 8 9 10 8 10 8 12 12 9 12 8 9 12 10 Eco 8 a) What is the process standard deviation o? What is oz? b) If z 3, what are the control limits for the mean chart? S6.15 The results of inspection of DNA samples taken over the past 10 days are given below. Sample size is 100. 1 2 3 4 5 6 7 8 9 10 Day Defectives 7 6 6 9 5 6 0 8 9 1 a) Construct a 3-sigma p-chart using this information. b) If the number of defectives on the next three days are 12, 5, and 13, is the process in control? PX