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1.
Three tables provide coefficients for polynomial approximations of Student's t and chi-square percentage points at 10 probability levels, with relative error less than .00005 相似文献
2.
This paper deals with a class of nonparametric two-sample tests for ordered alternatives. The test statistics proposed are based on the number of observations from one sample that precede or exceed a threshold specified by the other sample, and they are extensions of ?idák's test. We derive their exact null distributions and also discuss a large-sample approximation. We then study their power properties exactly against the Lehmann alternative and make some comparative comments. Finally, we present an example to illustrate the proposed tests. 相似文献