Computer-implemented method for preparing an evaluation of samples of measured values of a measured variable from a measurement of a plurality of workpieces by way of one or more coordinate measuring units , comprising the following steps: - matching a distribution type of a continuous statistical distribution to measured values of a sample of measured values and obtaining a first matched continuous statistical distribution (S2), - generating a plurality of synthetic values of the measured variable which conform to the first matched continuous statistical distribution in relation to the probability of them arising (S3), - forming a plurality of subgroups from the entirety of the measured values and the synthetic values of the measured variable, wherein each of the plurality of subgroups has a plurality of measured values and/or the synthetic values of the measured variable (S4), - calculating for each of the subgroups a calculation value of a derived variable, specifically a position variable, which describes a position of the measured values and/or the synthetic values of the measured variable of the subgroup, or a scatter variable, which describes the scattering of the measured values and/or the synthetic values of the measured variable of the subgroup (S5), - matching a distribution type of a continuous statistical distribution to the calculation values of the derived variable and obtaining a second matched continuous statistical distribution (S6), - determining an upper limit and a lower limit of a value range of values of the derived variable in such a way that, in accordance with the second matched continuous statistical distribution, a proportion of the values of the derived variable equal to a predefined statistical probability are within the value range which is limited by the upper and lower limit (S7). - matching a distribution type of a continuous statistical distribution to measured values of a sample of measured values and obtaining a first matched continuous statistical distribution (S2), - generating a plurality of synthetic values of the measured variable which conform to the first matched continuous statistical distribution in relation to the probability of them arising (S3), - forming a plurality of subgroups from the entirety of the measured values and the synthetic values of the measured variable, wherein each of the plurality of subgroups has a plurality of measured values and/or the synthetic values of the measured variable (S4), - calculating for each of the subgroups a calculation value of a derived variable, specifically a position variable, which describes a position of the measured values and/or the synthetic values of the measured variable of the subgroup, or a scatter variable, which describes the scattering of the measured values and/or the synthetic values of the measured variable of the subgroup (S5), - matching a distribution type of a continuous statistical distribution to the calculation values of the derived variable and obtaining a second matched continuous statistical distribution (S6), - determining an upper limit and a lower limit of a value range of values of the derived variable in such a way that, in accordance with the second matched continuous statistical distribution, a proportion of the values of the derived variable equal to a predefined statistical probability are within the value range which is limited by the upper and lower limit (S7). <EOS>