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Former Member
Apr 24, 2009 at 08:34 AM

Standard deviation not getting calculated

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Hi all,

For characteristics viscocity and density, i have maintained the upper, lower limits and target values.

Assigned a sample procedure valuation SPC inspection for the characteristic in the inspection plan and SPC criterion as MIC. I have recorded results for 6 lots. when i look into the report MCXD, system showing mean value for the characteristics but not the standard deviation

What could be the possible error?

Thanks

Sravan