Nota Tecnica 2 an Equal Variance Test
نویسندگان
چکیده
This article introduces (and hopes to encourage thereby) the econometrics practitioner to (use) a homoscedasticity test referred to in the field of statistics as the modified Levene test. Econometrics orthodoxy (from University to practice level) has focused mainly on three heteroscedasticity tests, namely the Goldfeld-Quandt (GQ), Breusch-Pagan-Godfrey (BPG), and the White (W) test. The difference between the aforementioned tests and the test elaborated on in this article is that the former are for regression whereas the latter is for ANOVA –analysis of variance– situations.
منابع مشابه
Manipulations of Choice Familiarity in Multiple-Choice Testing Support a Retrieval Practice Account of the Testing Effect
We performed 4 experiments assessing the learning that occurs when taking a test. Our experiments used multiple-choice tests because the processes deployed during testing can be manipulated by varying the nature of the choice alternatives. Previous research revealed that a multiple-choice test that includes “none of the above” (NOTA) produces better performance on a subsequent test only when th...
متن کاملTesting Software Systems Against Realistic User Errors
Le persone organizzano sempre di più ogni aspetto della propria vita attraverso l’utilizzo di sistemi software, dal lavoro al trasporto alla salute. Possiamo essere sicuri che i programmi dai quali ci accingiamo a dipendere sono affidabili ? Tali programmi possono tollerare maltrattamenti degli utenti? Questa tesi affronta il problema di verificare i sistemi software rispetto ad errori introdot...
متن کاملPET of tumors expressing gastrin-releasing peptide receptor with an 18F-labeled bombesin analog.
UNLABELLED The gastrin-releasing peptide receptor (GRPR) is overexpressed in human prostate cancer. Bombesin (BBN) is a neurotransmitter of 14 amino acids and binds with selectivity and with high affinity to GRPRs. We have synthesized a NOTA-conjugated bombesin derivative, NOTA-8-Aoc-BBN(7-14)NH(2), to label this analog with (18)F using the new Al(18)F method. In this study, the GRPR-targeting ...
متن کاملComparative study of 64Cu/NOTA-[D-Tyr6,βAla11,Thi13,Nle14]BBN(6-14) monomer and dimers for prostate cancer PET imaging
BACKGROUND Gastrin-releasing peptide receptors [GRPR] are highly over-expressed in multiple cancers and have been studied as a diagnostic target. Multimeric gastrin-releasing peptides are expected to have enhanced tumor uptake and affinity for GRPR. In this study, a 64Cu-labeled 1,4,7-triazacyclononane-1,4,7-triacetic acid [NOTA]-monomer and two NOTA-dimers of [D-Tyr6,βAla11, Thi13, Nle14]bombe...
متن کاملComparative evaluation of 111In-labeled NOTA‑conjugated affibody molecules for visualization of HER3 expression in malignant tumors.
Expression of human epidermal growth factor receptor type 3 (HER3) in malignant tumors has been associated with resistance to a variety of anticancer therapies. Several anti-HER3 monoclonal antibodies are currently under pre-clinical and clinical development aiming to overcome HER3-mediated resistance. Radionuclide molecular imaging of HER3 expression may improve treatment by allowing the selec...
متن کامل