TY - GEN

T1 - Assessing the effects of different types of covariates for binary logistic regression

AU - Hamid, Hamzah Abdul

AU - Wah, Yap Bee

AU - Xie, Xian-Jin

AU - Rahman, Hezlin Aryani Abd

PY - 2015/1/1

Y1 - 2015/1/1

N2 - It is well known that the type of data distribution in the independent variable(s) may affect many statistical procedures. This paper investigates and illustrates the effect of different types of covariates on the parameter estimation of a binary logistic regression model. A simulation study with different sample sizes and different types of covariates (uniform, normal, skewed) was carried out. Results showed that parameter estimation of binary logistic regression model is severely overestimated when sample size is less than 150 for covariate which have normal and uniform distribution while the parameter is underestimated when the distribution of covariate is skewed. Parameter estimation improves for all types of covariates when sample size is large, that is at least 500.

AB - It is well known that the type of data distribution in the independent variable(s) may affect many statistical procedures. This paper investigates and illustrates the effect of different types of covariates on the parameter estimation of a binary logistic regression model. A simulation study with different sample sizes and different types of covariates (uniform, normal, skewed) was carried out. Results showed that parameter estimation of binary logistic regression model is severely overestimated when sample size is less than 150 for covariate which have normal and uniform distribution while the parameter is underestimated when the distribution of covariate is skewed. Parameter estimation improves for all types of covariates when sample size is large, that is at least 500.

KW - Binary logistic regression

KW - Parameter estimation

KW - Simulation

UR - http://www.scopus.com/inward/record.url?scp=85006336276&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85006336276&partnerID=8YFLogxK

U2 - 10.1063/1.4907476

DO - 10.1063/1.4907476

M3 - Conference contribution

AN - SCOPUS:85006336276

T3 - AIP Conference Proceedings

SP - 425

EP - 430

BT - 2nd ISM International Statistical Conference 2014, ISM 2014

A2 - Noar, Nor Aida Zuraimi Md

A2 - Zakaria, Roslinazairimah

A2 - Yusoff, Wan Nur Syahidah Wan

A2 - Mohamad, Mohd Sham

A2 - Hamid, Mohd Rashid Ab

PB - American Institute of Physics Inc.

T2 - 2nd ISM International Statistical Conference 2014: Empowering the Applications of Statistical and Mathematical Sciences, ISM 2014

Y2 - 12 August 2014 through 14 August 2014

ER -