1. Historically, the average proportion of defective chocolate bars has been 1.5%. Samples will be of 60 bars each. Construct a p-chart using z = 3. What is the value of LCL?
2. A hotel tracks the number of complaints per month. When the process is in control, there is an average of 7 complaints per month. Assume that a 3-sigma control limit is used. What is the upper control limit?
3. A laser eye surgery process has tolerances of plus or minus 0.0001 inches. What does the process standard deviation need to be in order for this process to have a capability ratio of 2.000?
Please show work step-by-step.