A Double Sampling Procedure to Control the Variance in Net Weight Acceptance Sampling

Abstract

This paper describes a double sampling scheme to estimate with at least a given precision the mean of a variate whose variance has two components one of which is unknown. Although the procedure is described almost entirely in terms of a particular problem (quality control of net weight), it may be applied in a more general situation (section 5). The consequences of using either the mean square error or the range to estimate variance are investigated.

KEY WORDS:

• Double sampling
• Acceptance sampling
• New weight