Question: 1.a) The population mean and standard deviation for a process for which we have a substantial history are 120 and 12.91, respectively. For the variable

1.a) The population mean and standard deviation for a process for which we have a substantial history are 120 and 12.91, respectively. For the variable control chart, a sample size of 16 will be used. What is the standard deviation of the sampling distribution? (Round to two decimal places)

b) The population mean and standard deviation for a process for which we have a substantial history are 120 and 12.12, respectively. For the variable control chart, a sample size of 16 will be used. What is the three-sigma upper control limit for the process? (Round to two decimal places)

c) The population mean and standard deviation for a process for which we have a substantial history are 120 and 12.12, respectively. For the variable control chart, a sample size of 16 will be used. What is the three-sigma upper control limit for the process? (Round to two decimal places)

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