The index of inconsistency is outlined as a special statistic for judging the reliability of survey data classified by size classes. The index estimates take on, as a rule, values between 0 and 1 according to a previously definded restriction for dichotomized proportions in the estimation...

In order to judge the quality of survey data it is necessary above all to estimate the size of the individual error components, i. e. the systematic and the random errors in the responses (survey data) of the surveyed units and, if feasible, to determinate their true value. This paper develops...