For working out examples similar to those in this book, it is desirable to use a 7-figure table of logarithms, trigonometric functions, etc., such as Chambers' and Barlow's Tables of Squares, etc. A multiplying machine will save much heavy arithmetic.

The following will be found of help in various ways:

Biometrika Tables for Statisticians. Edited by E. S. Pearson and H. O. Hartley, Camb. Univ. Press.

Tables for Statisticians and Biometricians, Parts I and II. Edited by K. Pearson. Camb. Univ. Press.

Tracts for Computers. Camb. Univ. Press, especially IX, giving log Г(x) from x = 1 to 50·9 by intervals of 0·01; XV and XXIV, Random Sampling Numbers, and XXIII, Tables of tan−1x and log(1+x2).

The following lists of books and papers deal with the subject generally or with parts of it. The lists are confined to work written in English and do not aim at a complete bibliography. The books in the first list deal with parts of the subject from various points of view and will be found useful for further reading. The lists of papers include those mentioned in the text but do not give all the authorities consulted. Papers are not always included when their contents are more conveniently read in one of the books (e.g. in Fisher's Statistical Methods or in the Introductions to various statistical tables). The division between subjects is necessarily somewhat arbitrary.