Communications In Mathematics And Statistics

 Journal

 Alternative Estimator In Dichotomous Randomized Response Technique

 Ewemooje, O.S., Adebola, F.B., Amahia, G.N.

 2018

Obtaining correct responses to sensitive questions in social and behavioural researches is an ancient problem in survey research with respondents misreporting on sensitive behaviours or giving false response to protect themselves. This paper develops an alternative unbiased estimator by modifying the dichotomous randomized response technique model to tackle this problem. The proposed estimatorwas compared numerically with conventional ones by considering different practicable and suitable design choices. Proposed model was also considered when sampling with unequal probabilities with or without replacement. It was observed that the proposed estimator performs efficiently than the conventional ones. As the proposed model captures progressively more people involved in the sensitive attribute, the model outperforms other models considered. Therefore, social and behavioural researchers can now obtain correct and valid responses from sensitive behavioural researches with ease in order to make informed and reliable decisions. 

 Gazi University Journal Of Sciences

 Journal

 A Stratified Hybrid Tripartite Randomized Response Technique

 Ewemooje, O.S., Adebola, F.B., Adediran, A.A.

 2018

This paper proposes a new stratified technique to address the problem involving estimation of the population proportion of people with sensitive attribute(s). Studying the proposed technique under proportional and Neyman allocations shows that the proposed technique is more efficient than (outperforms) the Singh & Gorey [1] and Tarray & Singh [2] stratified randomized response models. Applying the proposed technique to a survey on drug use disorder also shows the applicability of the model. 

 African Journal Of Applied Statistics

 Journal

 Maternal Mortality And Associated Obstetric Risk Factors At Mother And Child Hospitals, Ondo State, Nigeria.

 Ewemooje O.S. And Omoniyi O.O.

 2017

Maternal Mortality was discussed in this study with associated obstetric risk factors in order to examine its perceived determinants and contribution of mortality rate was calculated as 381 deaths/100 000 live births. Simple descriptive analysis, Chi-square Independent test and spatial analysis were applied on 6-year study from which 33 615 deliveries resulting in 128 perinatal deaths. The maternal fetal death, Antepartum Haemorrhage and Eclampsia were found to significantly causing 13.7%, 12.9% and 12.9% maternal deaths, respectively. For every unit increase in the mother's age, the risk of being involved in maternal deaths increases with caesarean section as the leading risk factor. The Mother and Child Hospitals have helped in reducing the Maternal Mortality by about 51% in the state from 745 per 100 000 live births in 2009 to 381per 100 000 live births in 2016. 

 Communications In Statistics - Theory And Methods

 Journal

 Hybrid Tripartite Randomized Response Technique

 Adebola F.B, Adediran A.A. And Ewemooje O.S.

 2017

In this paper, a new randomized response technique has been proposed that combines the unrelated question randomized response technique and tripartite randomized response technique. The relative efficiency of the newly proposed Randomized Response technique over the existing Randomized Response technique was obtained. It was observed that the relative efficiency of the proposed technique over the tripartite RRT increases with increase in ?A and ?U. The applicability of the proposed technique was also shown. However, it has been shown that the proposed technique performs better than the conventional ones. 

 Proceedings Of The 5th Annual Conference Of School Of Science, SOS 2017

 Conferenceproceeding

 Efficiency Of Alternative Estimators In Randomized Response Technique

 Adebola F.B., Ewemooje O.S. And Ayeni O.C.

 2017

NILL 

  FUTA Journal Of Research In Sciences

 Journal

 Improving The Efficiency Of Randomized Response Technique For Two Sensitive Characters

 Ewemooje Olusegun S. And Amahia Godwin N.

 2016

This work offers ways of maximizing efficiency of randomized response technique or two sensitive characters. In order to maximize the efficiency, two models; simple and crossed models were considered under equal and unequal protections. It was discovered that as increases, the simple model with equal protection becomes more efficient than the crossed model with unequal protection. And as continues to increase, the simple model with equal protection becomes approximately equal to the crossed model with equal protection. It was also shown that model with equal protection is more efficient than that due to unequal protection for both simple and crossed models. Hence, to ensure better estimation of two sensitive characters at a time, there is need to allow for equal protection of the respondents on each of the characters of interest. 

 Afrika Statistika

 Journal

 Improved Randomized Response Technique For Two Sensitive Attributes

 Ewemooje Olusegun S. And Amahia Godwin N.

 2015

We proposed new and more efficient estimators for estimating population pro- portion of respondents belonging to two related sensitive attributes in survey sampling by extending the work of Mangat (1994). Our proposed estimators are more efficient than Lee et al., (2013) simple and crossed model estimators as the population proportion of possessing the sensitive attribute increases. 

 Cogent Mathematics

 Journal

 Estimating Two Sensitive Characters With Equal Probabilities Of Protection

 Ewemooje O.S.

 2014

This work seeks to improve the procedure for estimating two sensitive characteristics at a time by introducing equal probabilities of protection on the randomized devices. Equal protection estimators have been proposed. It was discovered that equal probabilities of protection increases the efficiency. The proposed model and estimators have been shown to be more robust and efficient than the conventional ones. 

 Journal Of Advances In Agriculture, Sciences And Engineering Research

 Journal

 Modelling Road Traffic Fatalities In Nigeria With Weibull Distribution.

 Ewemooje Olusegun S.

 2014

The technique offers new opportunities for road traffic crashes analysis as it was established that the random variable T has a Weibull distribution with parameters ?, ?. The values of these parameters were estimated using the available data. It was believed that the losses produced by a malfunctioning road transport system are fatalities. Risk exposure to these losses is defined with the average number of persons using the roads. It was also established that the national road safety trend measured with the number of road traffic fatalities is positive, i.e. declining. However, there is reason to believe that the dynamics of the fatality reduction is too small to reach the target set out by UN Decade of Action for Road Safety 2011–2020 of curbing rising traffic injuries and fatalities; and Safe Road in Nigeria to reduce road crashes death and injuries by 50% by 2020. 

 Journal Of Advances In Agriculture, Sciences And Engineering Research: Volume 3 (7): 956 - 963.

 Journal

 Efficiency Of Two-Phase Sampling For Regression Estimator In Sustaining Cassava Production For Development.

 Ewemooje O. S. And Amahia G. N.

 2013

Precision of any estimate made from a sample depends both on the method by which the estimate is calculated and on the plan of sampling. In this research work, we examined efficiency of two-phase sampling for regression estimator using data on cassava production (sprout ability and root weight) for 2004 planting season at IITA research site, Mokwa, Niger State, Nigeria. A large first-phase sampling without replacement of size 87 taken from a population of 100 sprout ability, (x) and a second-phase sub-sample of 13 of the initial 87 first-phase sample was then drawn and both y and x were measured. The results show that there is a strong and positive correlation coefficient of 0.934 between the auxiliary variable and the response variable. Efficiency of two-phase sampling was illustrated using different values of the correlation coefficient, ρ and arbitrary cost ratios. We found that efficiency increased with smaller values of λ and higher values of ρ. ...