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Pooled variance is the arithmetic mean of a number of variances. Due consideration is being given to their respective degrees of freedom.

If s1^2 , s2^2 , s3^2 …… sk^2 are estimates of variances and n1, n2, n3, …, nk their respective degrees of freedom, then pooled variance S2 is given as

Standard uncertainty uA= S

Source: measurement uncertainty

Post Author: ghaemi mohammad

This site has been established to provide updated and specialized information in the field of quality management systems and to share my experiences in the field of conformity assessment and promotion and promotion of this science.

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