
The subgroup range (highest minus lowest value).
The average range of a series of subgroups of constant size.
Sample Standard Deviation
A unilateral engineering specification unit.
The number of nonconformities per unit in a sample which may contain more than 1 unit.
The average number of nonconformities per unit in samples not necessarily of the same size.
The upper control limit.
The upper engineering specification limit.
An individual value upon which other subgroup statistics are based.
The average of values in a subgroup.
The average of subgroup averages (weighted, if necessary, by sample size). The measured process average.
The standard deviation of the distribution of individual values of a process characteristic.
An estimate of the standard deviation of a process characteristic.
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