Calculation of Confidence Intervals for Noncentrality Parameters
非中心参数置信区间的计算
Summary The end points of a confidence interval for the noncentrality parameter of noncentral χ2 or F are identified as upper and lower percentage points of a distribution. It is shown how these can be calculated by applying the inverse Cornish–Fisher expansion. The same procedure can be used to find the value of the noncentrality needed to give a fixed size χ2 or F test some specified power; however, in this situation the results may be only approximate.