In this paper, a new design-oriented two-stage two-sided simultaneous confidence intervals, for comparing several exponential populations with control population in terms of location parameters under heteroscedasticity, are proposed. If there is a prior information that the location parameter of...

A test statistic based on isotonic estimators for testing homogeneity of variances of several normal populations against a simple tree ordered alternative is proposed. Null distribution of the proposed test statistic is derived and the critical constants required for the implementation of the...