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作者：DIXON, WJ; MOOD, AM
摘要：A simple test of the equality of 2 columns of paired observations utilizing the signs and ignoring the magnitude of the intra pair differences. Equivalent to the test described by Cole [see B. A. 19(9): entry 17990] but differently tabulated to show the number of disagreeing signs compatible with different levels of significance for up to 100 pairs of observations. Efficiency is compared with that of the t-test for certain conditions.
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作者：WAUGH, FV
摘要：Given that the partial regression of x1 on Xk is b1k and its standard error is S, the partial correlationcoefficient, [image] where N[image] is the number of degrees of freedom. Examples from Ezekiel''s text show that this method of computation saves much labor as compared with the Doolittle method. The above formula is derived.
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作者：WHELPTON, PK
摘要：A discussion of errors involved in computing reproduction rates from age-specific birth rates. These rates differ from age-specific death rates in that the risk of birth is zero for part of the population in any year and that only women of n parity order can be exposed to the risk of bearing a child of n + 1 order. Age-parity-fecundity-marriage specific birth rates are recommended for use where adequate population data are available.
