When control limits are computed from the input data, three methods (referred to as default, MVLUE, and RMSDF) are available for estimating the process standard deviation .The method depends on ...

The sample standard deviation is a commonly used estimator of the population scale. However, it is sensitive to outliers and may not remain bounded when a single data point is replaced by an arbitrary ...

This is a preview. Log in through your library . Abstract Gupta's (1952) estimator of the standard deviation of a normal population, depending only on the expected values of the normal order ...

Healy's adaptation of Downton's linear estimator of the standard deviation suitable for symmetrically censored normal samples is extended to asymmetric censoring. An approximation for the variance of ...