作者：SUKHATME, PV
摘要：For estimating crop yield from the yield of sample plots, large plots of 0.01 acres or more are used in some regions and very small plots of 0.0003 acres or less are employed in other regions. Three empirical comparisons of large and small plots in India suggest that the results from small plots are biased and tend to overestimate average yield. The bias evidently arises from uneven sowing and the inability of the sample-collectors to decide which of the plants on the borders of plots should b...
作者：BERKSON, J
摘要：Testing procedures for separating populations into 2 mutually exclu-sive categories must be judged in terms of 2 numbers rather than a single index. A test has utility or sensitivity in proportion to its efficiency for correctly selecting from the population all members of category A. The cost or specificity of a test is proportional to its yield of false-positive results; non-A individuals classified as A. For normally distributed test scores a mean-cost-rating index (M.C.R.) may be derived, ...
作者：KNUDSEN, LF; CURTIS, JM
摘要：For biological assays designed to compare a sample of unknown potency with a standard in terms of % response, the angular transformation is advocated as giving essentially the same results as the probit transformation but requiring much less computation. Several modifications of assay design permit further simplification. By using the same number of animals for each dose, only 2 dosage levels each of standard and unknown, and a constant ratio of high dose to low dose, results may be so simplif...
