De omvang van de steekproef bij een enkelvoudig steekproefsysteem

J. H. Enters

Statistica Neerlandica, 1948, vol. 2, issue 5‐6, 228-234

Abstract: Summary (Sample size for a single sampling scheme). The operating characteristic of a sampling scheme may be specified by the producers 1 in 20 risk point (p1), at which the probability of rejecting a batch is 0.05, and the consumers 1 in 20 risk point (p2) at which the probability of accepting a batch of that quality is also 0.05. A nomogram is given (fig. 2) to determine for single sampling schemes and for given values of p1and p2the necessary sample size (n) and the allowable number of defectives in the sample (c). The nomogram may reversedly be used to determine the producers and consumers 1 in 20 risk points for a given single sampling scheme. The curves in this nomogram were computed from a table of percentage points of the χ2 distribution. For v > 30 Wilson and Hilferty's approximation to the χ2 distribution was used.

Date: 1948
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