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2 results for “Welch–Satterthwaite formula”

Dictionary

Welch–Satterthwaite formula

The formula for estimating the effective degrees of freedom of a combined standard uncertainty from the degrees of freedom of its components — used to…

GUM (JCGM 100:2008) G.4

Questions

How do I select a coverage factor — is k=2 always correct?

…Use the Welch–Satterthwaite formula (GUM G.4) to compute ν_eff. If ν_eff ≥ ~30, k=2 is fine. If a Type A…

1 answer