In a sigma chart, what is the precise reason for calculating Sigma separately for each subgroup rather than calculating
Posted: Mon Dec 13, 2021 8:46 am
In a sigma chart, what is the precise reason for calculating Sigma separately for each subgroup rather than calculating grand average for sigma?
Sub group statistics are important to be represented
Sub group sigma is generally more accurate
Sub group sigma doesn’t introduce unnecessary special cause
Range is considered better than Sigma
Sub group statistics are important to be represented
Sub group sigma is generally more accurate
Sub group sigma doesn’t introduce unnecessary special cause
Range is considered better than Sigma