Residuals and Goodness-of-Fit

2018 ◽  
pp. 61-78
Author(s):  
Andrew B. Lawson
Keyword(s):  
Goodness Of Fit

Applying the Anderson-Darling Test to Suicide Clusters

Crisis ◽  
2013 ◽  
Vol 34 (6) ◽  
pp. 434-437 ◽  
Author(s):  
Donald W. MacKenzie
Keyword(s):  
Poisson Process ◽  
Goodness Of Fit ◽  
Small Samples ◽  
Massachusetts Institute Of Technology ◽  
Homogeneous Poisson Process ◽  
Cornell University ◽  
The Difference ◽  
Suicide Clusters ◽  
Institute Of Technology ◽  
Anderson Darling

Background: Suicide clusters at Cornell University and the Massachusetts Institute of Technology (MIT) prompted popular and expert speculation of suicide contagion. However, some clustering is to be expected in any random process. Aim: This work tested whether suicide clusters at these two universities differed significantly from those expected under a homogeneous Poisson process, in which suicides occur randomly and independently of one another. Method: Suicide dates were collected for MIT and Cornell for 1990–2012. The Anderson-Darling statistic was used to test the goodness-of-fit of the intervals between suicides to distribution expected under the Poisson process. Results: Suicides at MIT were consistent with the homogeneous Poisson process, while those at Cornell showed clustering inconsistent with such a process (p = .05). Conclusions: The Anderson-Darling test provides a statistically powerful means to identify suicide clustering in small samples. Practitioners can use this method to test for clustering in relevant communities. The difference in clustering behavior between the two institutions suggests that more institutions should be studied to determine the prevalence of suicide clustering in universities and its causes.

Confirmatory Factor Analysis of the Long and Short Forms of the Worry Domains Questionnaire

2009 ◽  
Vol 25 (4) ◽  
pp. 239-243
Author(s):  
Roberto Nuevo ◽  
Andrés Losada ◽  
María Márquez-González ◽  
Cecilia Peñacoba
Keyword(s):  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Factor Structure ◽  
Goodness Of Fit ◽  
Factorial Validity ◽  
Fit Indices ◽  
Short Forms ◽  
Confirmatory Factor ◽  
Positive Correlations ◽  
Future Work

The Worry Domains Questionnaire was proposed as a measure of both pathological and nonpathological worry, and assesses the frequency of worrying about five different domains: relationships, lack of confidence, aimless future, work, and financial. The present study analyzed the factor structure of the long and short forms of the WDQ (WDQ and WDQ-SF, respectively) through confirmatory factor analysis in a sample of 262 students (M age = 21.8; SD = 2.6; 86.3% females). While the goodness-of-fit indices did not provide support for the WDQ, good fit indices were found for the WDQ-SF. Furthermore, no source of misspecification was identified, thus, supporting the factorial validity of the WDQ-SF scale. Significant positive correlations between the WDQ-SF and its subscales with worry (PSWQ), anxiety (STAI-T), and depression (BDI) were found. The internal consistency was good for the total scale and for the subscales. This work provides support for the use of the WDQ-SF, and potential uses for research and clinical purposes are discussed.

Finding Goodness of Fit When You are Black, Poor, Male, and Disturbed

1988 ◽  
Vol 33 (10) ◽  
pp. 885-886
Author(s):  
Judith K. Grosenick
Keyword(s):  
Goodness Of Fit ◽  
Black Poor

LABORATORY TESTS OF THYROID FUNCTION IN HYPERTHYROIDISM II.

1969 ◽  
Vol 62 (4_Suppla) ◽  
pp. S23-S35
Author(s):  
B.-A. Lamberg ◽  
O. P. Heinonen ◽  
K. Liewendahl ◽  
G. Kvist ◽  
M. Viherkoski ◽  
...  
Keyword(s):  
Thyroid Function ◽  
Laboratory Tests ◽  
Goodness Of Fit ◽  
Point Of View ◽  
Accurate Estimation ◽  
Diagnostic Efficiency ◽  
Normal Limits ◽  
Significant Difference ◽  
Crossing Point ◽  
Hyperthyroid Patients

ABSTRACT The distributions of 13 variables based on 10 laboratory tests measuring thyroid function were studied in euthyroid controls and in patients with toxic diffuse or toxic multinodular goitre. Density functions were fitted to the empirical data and the goodness of fit was evaluated by the use of the χ2-test. In a few instances there was a significant difference but the material available was in some respects too small to allow a very accurate estimation. The normal limits for each variable was defined by the 2.5 and 97.5 percentiles. It appears that in some instances these limits are too rigorous from the practical point of view. It is emphasized that the crossing point of the functions for euthyroid controls and hyperthyroid patients may be a better limit to use. In a preliminary analysis of the diagnostic efficiency the variables of total or free hormone concentration in the blood proved clearily superior to all other variables.

Simultaneous Testing For The Goodness Of Fit To Two Or More Samples

2012 ◽  
Vol 1 (1) ◽  
pp. 17-22
Author(s):  
Narinder Kumar ◽  
Gobind P. Mehta
Keyword(s):  
Goodness Of Fit ◽  
Simultaneous Testing

Faktor – Faktor Yang Mempengaruhi Kepatuhan Wajib Pajak

2017 ◽  
Vol 2 ◽  
pp. 184
Author(s):  
I Made Sudiartana ◽  
Ni Putu Yuria Mendra
Keyword(s):  
Goodness Of Fit

Penelitian ini untuk mengetahui faktor yang dapat mempengaruhi kepatuhan wajib pajak yang bersumber dari diri wajib pajak maupun faktor diluar diri wajib pajak.Karakteristik wajib pajak dapat dilihat dari jenis kelamin, usia, pendidikan. Selain faktor karakteritik individu, ada beberapa hal juga yang dapat mempengaruhi kepatuhan wajib pajak bagi pemilik UMKM yaitu seperti bidang usaha, bentuk usaha, penjualan, pelapor dan pengisi SPT.Data penelitian diperoleh dengan membagikan kuesioner kepada wajib pajak badan yaitu UMKM yang ada di Kabupaten Gianyar.Populasi penelitian ini adalah seluruh UMKM di Kabupaten Gianyar. Penentuan jumlah sampel dilakukan menggunakan rumus Slovin. Teknik analisis data meliputi uji intrumen yaitu validitas dan reliabilitas; uji asumsi klasik meliputi uji normalitas, heteroskedastisitas, dan multikolinearitas; goodness of fit meliputi Koefisien determinasi, uji F, dan uji t; serta menggunakan analisis regresi berganda. Hasil penelitian menyatakan bahwa bidang usaha, pendidikan, penjualan tidak berpengaruh terhadap kepatuhan wajib pajak, sedangkan bentuk usaha, jenis kelamin, usia berpengaruh positif terhadap kepatuhan wajib pajak, sedangkan pengisi dan pelapor SPT berpengaruh negatif terhadap kepatuhan wajib pajak

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