Unformatted text preview: UCL x z LCL x z--= = = + = -: Grand mean of the samples (std dev of the sample means) = Process standard deviation Sample size Standard normal deviate (2 or 3) x where n n z x-= = = / = =----4 3 R R UCL D LCL D = = __ (1 ) is the avg. fraction defective of the population can be estimated from the of the samples UCL LCL p p p p p p p n p p p p z p z-= = + =-UCL x z LCL x z n n = = = + = -...
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- Spring '10
- Standard Deviation, actual output, UCL, OT/CT Target CT