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    Variance Estimation for Poverty Indicators via Linearization Technique 

    Jakperik, Dioggban; Otieno, Romanus Odhiambo; Orwa, George Otieno (2018-08-24)
    In this study, an assessment of precision of poverty indicators is made with a view to improving its performance. A multiplicative bias reduction density function is used in estimating the poverty indicators and compared ...
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    Deriving Penalized Splines For Estimation Of Time Varying Effects In Survival Data 

    Orwa, Albert Otieno; Orwa, George Otieno; Otieno, Romanus Odhiambo (International Journal of Scientific & Technology Research, 2014)
    The major interests of survival analysis are either to compare the failure time distribution function or to assess the effects of covariate on survival via appropriate hazards regression models. Cox’s proportional hazards ...
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    Robust Estimation of Finite Population Totals Using a Model Based Approach in the Presence of Two Auxiliary Variables 

    Mulwa, Damaris Felistus; Orwa, George Otieno; Otieno, Romanus Odhiambo (International Journal of Data Science and Analysis, 2018)
    The utilization of auxiliary information during surveys increases the accuracy of estimators, thereby giving more reliable estimates of the population parameters of interest. It has been established that the presence of ...
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    A bootstrap variance estimation under stratification with few units per stratum. 

    Habineza, Alexis; Otieno, Romanus Odhiambo; Orwa, George Otieno; Makumi, Nicholas (Journal of Statistics Applications & Probability Letters, 2022)
    The measurement errors exist and sample survey results are always uncertain because only a portion of the population is measured. Larger samples and superior measurement tools can help to reduce this uncertainty. The ...
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    Coverage properties of a neural network estimator of finite population total in high-dimensional space. 

    Were, Festus A.; Orwa, George Otieno; Otieno, Romanus Odhiambo; Makumi, Nicholas; Aldallal, Ramy (Journal of Mathematics, 2022)
    The problem in nonparametric estimation of finite population total particularly when dealing with high-dimensional datasets is addressed in this paper. The coverage properties of a robust finite population total estimator ...
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    On quantiles estimation based on stratified sampling using multiplicative bias correction approach. 

    Makumi, Nicholas; Otieno, Romanus Odhiambo; Orwa, George Otieno; Habineza, Alexis (Journal of Mathematics, 2022)
    In the context of stratified sampling, we develop a nonparametric regression technique to estimating finite population quantiles in model-based frameworks using a multiplicative bias correction strategy. Furthermore, the ...
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    Comparing Edgeworth Expansion and Saddlepoint Approximation in Assessing the Asymptotic Normality Behavior of A Non-Parametric Estimator for Finite Population Total 

    Okungu, Jacob Oketch; Orwa, George Otieno; Otieno, Romanus Odhiambo (EJ-MATH, European Journal of Mathematics and Statistics, 2023-01)
    Abstract — Sample surveys concern themselves with drawing inferences about the population based on sample statistics. We assess the asymptotic normality behavior of a proposed nonparametric estimator for finite a population ...
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    Orwa, George Otieno (17)
    Otieno, Romanus Odhiambo (17)Jakperik, Dioggban (3)Makumi, Nicholas (3)Habineza, Alexis (2)Maua, Muga Zablon (2)Onsongo, Winnie Mokeira (2)Aldallal, Ramy (1)Mulwa, Damaris Felistus (1)Mwita, Peter Nyamuhanga (1)... View MoreSubject, 𝛼�-Quantile (1)a -Quantile, Multiplicative Bias Correction, Pilot Smoother (1)Auxiliary Variable, Coverage Probabilities, Precision, Predictive Approach (1)Auxiliary variables Saddlepoint approximation. (1)Bootstrap bias corrector (1)Collapsed strata (1)Edgeworth expansion (1)Fine stratification (1)Model based surveys; robustness; confidence intervals (1)Multiplicative Bias Correction (1)... View MoreDate Issued2020 - 2023 (4)2010 - 2019 (13)Has File(s)Yes (17)

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