✍ Scribed by Fredrik Lindgren; Björn Hansen; Walter Karcher; Michael Sjöström; Lennart Eriksson
No coin nor oath required. For personal study only.
Regression rnodel validation by permutation tests was explored. Especially in cases where the rnodel significance is doubtful, a permutation test adds crucial information which can often can be decisive for the existence of the rnodel. The background and applicability of the test procedure are described. As an example, the use of permutation tests was extended to validation and investigation of four predictor variable selection techniques, namely MUSEUM, GOLPE, VIP and IVS-PLS. "he selection methods are briefly reviewed and cornpared. The permutation tests were applied before, during and after variable selection. Some similarities and differences in the behaviour of the variable selection techniques were found and are cornmented upon.
📜 SIMILAR VOLUMES
## Abstract A rapid, simple and specific method for estimation of anastrazole in human plasma was validated using letrozole as internal standard. The analyte and internal standard were extracted from plasma using simple solid‐phase extraction. The compound were separated on a reverse‐phase column w
By using a new international reference preparation for the plasma proteins(CRM470) prepared by IFCC, we launched a project to determine reference intervals for 13 plasma proteins (immunoglobulins, compliment components, transferrin, alantitrypsin, al acid glycoprotein, haptoglobin, a2macroglobulin,