Description: There is a task for determination of interval of uncertainty by the calculation of values of composite indexes, which are used in economic statistics: indexes of commodity circulation, realization volume, price indexes in a form of Paasche and Laspeyres. A task is decided in supposition that the data needed for calculations, are got on results of selective supervisions. The terms are certain that are necessary for a dispersion estimation of calculations, absolute and relative error of process of receipt of numeral values indexes. There are the terms for determination of maximum relative error by calculation of these indexes. A numeral example of solution of the given problem is made.
Keywords: index method, index of commodity circulation, index of realization volume, price index, Paasche index, index of Laspeyres, interval of uncertainty, maximum absolute error, maximum relative error