Fisher-Tchebysheff orthonormal polynomial were used to represent the three-dimensional pressure distribution. Together with a number of other independent variables they were then related to Eucumbene cathment rainfall by. means of a linear regression equation. This equation was subsequently used to forecast daily rainfall for 1957, which had not formed part of the original data. The correlation coefficient between actual and forecast rainfall on 91 days was 0.43, Which is significant on the 0.1 per cent level. The standard error of estimate was 0.145 inches. The results compared not Unfavourably with those obtained by other methods for the same period. Although the results at this stage are not good enough to be of great operational value, they appear sufficiently encouraging to warrant further investigation. Plans for these investigations are discussed.
E. B. Kraus (Tue,) studied this question.
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