| Article ID: | iaor19972611 |
| Country: | Germany |
| Volume: | 45 |
| Issue: | 1 |
| Start Page Number: | 31 |
| End Page Number: | 37 |
| Publication Date: | Jan 1997 |
| Journal: | Metrika |
| Authors: | Targhetta M.L. |
A two-stage procedure based on the statistic introduced by Scheffe to solve the Behrens-Fisher problem is considered in estimating the difference between the mean values of two normal distributions having unequal and unknown variances. Samples of unequal size are considered at each stage. A numerical example is given where the two-stage procedure is compared with the Satterthwaite approximate method.