Reference no: EM131660872
The overall average on a process you are attempting to monitor is 50.0 units. The process population standard deviation is 1.84. Sample size is given to be 4.
?a) Determine the ?3-sigma x overbarx?-chart control limits.
Upper Control Limit ?(UCL - subscript x = 52.76 units ?(round your response to two decimal? places).
Lower Control Limit ?(LCL - subscript x = 47.24 units ?(round your response to two decimal? places).
b) The ?2-sigma x overbarx chart control limits? are:
Upper Control Limit ?(UCL - subscript x) = ? units ?(round your response to two decimal? places).
Lower Control Limit (LCL - subscript x) = ? units ?(round your response to two decimal? places).
How has the confidence level?s changed?
A. The confidence level has dropped.
B. The confidence level has not changed.
C. The confidence level has raised.
NOTE: A is already answered. If you could help me solve B and "How has the confidence levels changed" , it would be much appreciated"
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