Zum Interpolationsverfahren von A. Schwengberg zur Ermittlung von Sterbewahrscheinlichkeiten

Summary

Schwengberg has devised a method permitting to determine on the basis of the “abridged” life table, which is published with intervals of 5 age years, probabilities of death for individual years by means of interpolation. In order to assess the precision of this procedure, the interpolation values computed for 1964/66 and 1965/67 were compared at the Federal Statistical Office with the figures of the abridged life tables. These investigations were made for selected spans of age. On an average the deviations were under 10 per cent.

This critical observation is by no means to detract from the merits of this interesting methodological study. However such an estimation is unnecessary because the probabilities of death for the individual years are already available from the table computations. As the insurance companies seem to be greatly interested in these figures, the Federal Statistical Office will in future publish also the unadjusted probabilities of death figures for individual years which have been computed according to the abridged procedure.