Scientific And Academic Publishers

 Journal

 An Improved Warner’s Randomized Response Model

 F. B. Adebola, O. O. Johnson

 2015

This paper presents a modification of Warner’s [8] Randomized Response model. According to O’Muircheartaigh et al [7], non-response is inevitable in a survey; in view of this, our model further reduces the non-response bias by further sampling for the non-respondents. In this paper we performed an empirical practice of our model and we also performed the empirical comparison of our model with Warner [8] model. We discovered that our model is more efficient than the Warner [8] model. 

 Global Journal Inc

 Journal

 A Class Of Regression Estimator With Cum-Dual Product Estimator As Intercept

 F. B. Adebola & N. A. Adegoke

 2015

This paper examines a class of regression estimator with cum-dual product estimator as intercept for estimating the mean of the study variable Y using auxiliary variable X. We obtained the bias and the mean square error (MSE) of the proposed estimator. We also obtained MSE of its asymptotically optimum estimator (AOE). Theoretical and numerical validation of the proposed estimator was done to show it’s superiority over the usual simple random sampling estimator and ratio estimator, product estimator, cum-dual ratio and product estimator. It was found that the asymptotic optimal value of the proposed estimator performed better than other competing estimators and performed in exactly the same way as the regression estimator, when compared with the usual simple random estimator for estimating the average sleeping hours of undergraduate students of the department of statistics, Federal University of Technology Akure, Nigeria. 

 Academic Journals

 Journal

 Family Characteristics: Indices Of Adolescents Sexual Behaviour

 Adebola, Olukemi Grace And Adebola, Femi Barnabas

 2015

This study examined the effect of family characteristics and parental status on adolescents’ sexual behavior in Okun land of Kogi State. Data were obtained from male and female adolescents in ten Government Secondary Schools among the Okun-Yoruba tribe of Kogi State. The Okun-Yorubas occupied five LGAs of the state. Two schools were selected from each of the LGAs. In all, 781 copies of questionnaire were distributed and 768 were retrieved from respondents. This sample responded to a semi-structured questionnaire which contained both open and closed ended questions on sexual activities among adolescents as facilitated by family and parental background and activities. The findings reveal that adolescents’ sexual behaviors are affected by their family or parental sexual life style, income and education level, tutelage, etc. Association between adolescents’ sexual behavior and parental indices as mentioned above were tested using the Chi-square test. The t-test was used to determine the significance of the findings while Cramer’s V value was used to test the strength of the associations. Results of the Chi-square tests were corroborated by focus group discussion and Indepth interview conducted among respondents and teachers. This allows for triangulation among responses gathered. Conclusions were drawn based on the findings and recommendations proffered 

 International Institute Of Science And Technology Education

 Journal

 A Modified Stratified Randomized Response Techniques

 F. B. Adebola, O. O. Johnson And N.A. Adegoke

 2014

This paper presents a modification of Kim and Warde’s (2004) Stratified Warner’s Randomized Response Technique (SWRRT) and Kim and Elam’s (2007) Stratified Unrelated Question Randomized Response Technique with known distribution (SURRT) using optimal allocation. Our models further reduce the non-response bias by introducing the concept of sub-samples of non-respondent developed by Hansen and Hurwitz (1946) to the above mentioned models. In this paper we perform an empirical practice of our model and we also perform the empirical comparison of our models with both Kim and Warde (2004) and Kim and Elam (2007) models. We discovered a new note in the empirical comparative study of our models. 

 Nigerian Association Of Mathematical Physics

 Journal

 A Survey Of Examination Malpractices Using The Randomized Response Technique.

 Adebola, F.B And Adegoke N.A.

 2013

We administered a questionnaire survey using both the randomized response (RR) technique and the direct questioning (DQ) technique to directly estimate the prevalence of examination malpractices in The Federal University of Technology, Akure in Ondo State, Nigeria. The effectiveness of the RR technique in reducing response and non-response biases was also assessed and we examined the relationship between examination malpractices and key demographic variables. It was discovered that RR technique was effective in reducing non-response bias, but its effectiveness in reducing response bias could not be established statistically. Some relationships were found between the demographic variables examined and examination malpractices. 

 Keja Publications

 Journal

 An Optimal Setting For Production Process Using Inverted Loss Function.

 Obafemi, O.S., Ajao I.O., Adebola, F.B.

 2013

In manufacturing, loss Function expresses the economic consequences associated with deviation from target; since different process have different sets of economic consequences a better approach to developing loss function and setting optimal values is desirable. This work focused on the use of loss function based on inverted normal probability density Function known as the inverted Normal loss function in determining an optimal setting for a production process. Basic programming language is used to determine the expected loss of weights with varying loss values, on weights of cigarette. The optimal value for the manufacturing of cigarette process was obtained to be 1030mg. 

 International Institute Of Science And Technology Education

 Journal

 On A New Method Of Bias Reduction: Alternative To Approximately Unbiased Ratio Estimators

 Adebola ,F.B. And Oshungade ,I.O

 2012

This paper proposes a new method of bias reduction from order n?1 to order n?2 resulting in a new approximately unbiased ratio estimator. The efficiency of this estimator for the ratio of population means of two characters is compared with the existing six other Ratio estimators under a linear regression model. 

 Nigerian Association Of Mathematical Physics

 Journal

 On A Numerical Comparison Of The Proposed Randomized Response Technique With Hussain And Shabbir (2007)

 Adebola, F.B And Adepetun, A.O

 2012

Randomized Response Techniques (RRTs) were developed for the purpose of improving response rate by protecting surveyee’s privacy and avoiding answer bias.In this paper, we succinctly investigated the trend of the response rate (?) with both the proposed Randomized Response Technique (RRT) and the conventional one. We found that the proposed (RRT) is better than the conventional one at each response rate since it gives smaller variance. 

 International Institute Of Science And Technology Education

 Journal

 On A Qualitative Comparison Of The Proposed Randomized Response Technique With Hussain And Shabbir (2007).

 Adebola, F.B And Adepetun, A.O

 2012

Randomized Response Techniques (RRTs) were developed for the purpose of improving response rate by protecting surveyee's privacy and avoiding answer bias.In this paper, we succinctly investigated the trend of the response rate (?) with both the proposed Randomized Response Technique (RRT) and the conventional one. We found that the proposed (RRT) is better than the conventional one at each response rate since it gives smaller variance. 

 Nigeria Association Of Mathematical Physics

 Journal

 : Comparison Of Some Approximately Unbiased Ratio Estimators Using A Monte Carlo Approach Under Non Normal Error Regression Model

 F.B Adebola

 2012

This paper compares seven approximately unbiased ratio estimators along side with the classical ratio estimator under a non-normal linear regression model. The variances, bias, mean squared errors and efficiencies of these estimators for the ratio of population means of two characters were compared using Monte Carlo. Our findings revealed that RA is the best