Abstract
Two 20 decimal place tables of percentile points of the normal distribution are given. Table 1 gives X(P), the 100 Pth. percentile point, for P = .500(.005).995. Table 2 gives X(P) for Q = 1 -P = 5–10-k , 2.5·10-k and 1·10-k ; k = 1 (1)20.

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