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Student–Fisher t 检验的列线图
A nomogram is given for estimating the probability (P) for a given value of the “Student”-Fisher t test (t ranging from 1 to 65) for values of degree of freedom from 1 to infinity). Values of P from 0.5 to 0.00001 are given.
卡方概率列线图
T O DECIDE if a calculated value of x2 is significant it is customary to use a table such as that given by Fisher [5]. The experimenter thus finds the frequency with which, according to some hypothesis as to the population(s) from which the samples are drawn, random sampling would give numbers leading to a x2 greater than that actually obtained. Presently available tables may give values of this probability for integral values of x2 (Elderton, Yule), or, as in Fisher's…