O This question will be sent to your instructor for grading. Given the following process control data for a normally distributed quality variable (three samples of size four each) Machine #1 #2 #3 15 18 16 Measurements 14 15 16 20 17 16 12 16 17 if the process is known to have a mean of 15 and a standard deviation of 3, what are the three sigma upper and lower controlli bar chart? Short Answer Toolbar novation B | us A2 Shobh COM OPTE Prev 12 of 20 Next > Desktop 21"C 13 o search