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Browsing Mathematics by Author "Adnan, A."
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Item PENAKSIR RASIO DAN PRODUK YANG EFISIEN UNTUK RATA-RATA POPULASI PADA SAMPLING ACAK SISTEMATIK(2014-03-25) Pratiwi, D. L.; Adnan, A.; Sugiarto, S.In this article we study the combination of ratio estimator and product estimator in systematic random sampling, which is a review and an expansion correction from the article of Singh, et. al. [Journal of Modern Applied Statistical Methods, 10: 424-435]. Each estimator is a biased estimator and the mean square errors are determined. Estimator with the smallest mean square error is the most efficient estimator. An example is given at the end of the discussion.Item PENAKSIR RASIO YANG EFISIEN UNTUK RATA-RATA POPULASI DENGAN MENGGUNAKAN VARIABEL TAMBAHAN PADA SAMPLING DUA TAHAP(2014-03-25) Handayani, R.; Adnan, A.; Sirait, H.This paper reviews three ratio estimators for the population mean in two-phase sampling proposed by Sukhatme. All ratio estimators are biased estimator. TheirMSE(mean square errors) are compared to find the most efficient estimator. This comparison shows that the ratio estimator in two-phase sampling has the smallest MSE(mean square error). A numerical example is given to explain the problem discussed