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 -