The paper presents the problem of determining the accuracy usable of geo-detic Instruments. The results of test measurements will be evaluated using tests of mathematical statistics by the statistical Abeb's test and the Shapiro - Wilk test. Will discuss the theoretical basis for conformance testing and arę given ways of their practical application.The study concludes that the tested instruments meet the conditions of both statistical tests and thus arę suitable for making measurements in engineering geodesy .
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