Quality indicators: coefficient of variation and non-response rate. Member States shall report information for characteristics, levels and series as specified below, in accordance with any derogation that may have been conceded for the reference year. For each series, characteristic and activity level mentioned below, Member States shall report the overall coefficient of variation taking into account, according to the survey design, the non-responses, the misclassification errors and, if necessary, the sampling error. The coefficient of variation is the ratio of the square root of the variance of the estimator to the expected value.
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