What is the UCL for a X-bar chart?
Use the information below to answer the question. Use the "Factors for Control Limits" Table A.3 from the textbook where required:
A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F) are noted in the table below:
A) 253.218
B) 247.852
C) 250
D) 252.527
A) 253.218
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