Sains Malaysiana 40(4)(2011): 397–401

On Comparison of Some Variation of Ranked Set Sampling

(Tentang Perbandingan Beberapa Variasi Pensampelan Set Terpangkat)

Kamarulzaman Ibrahim*

School of Mathematical Sciences, Faculty of Science and Technology

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D.E., Malaysia

Diserahkan: 28 April 2010 / Diterima: 1 November 2010

ABSTRACT

Many sampling methods have been suggested for estimating the population median. In the situation when the sampling units in a study can be easily ranked than quantified, the ranked set sampling methods are found to be more efficient and cost effective as compared to the simple random sampling. In this paper, the superiority of several ranked set sampling methods over the simple random sampling are illustrated through some simulation study. In addition, some new research topics under ranked set sampling are suggested.

Keywords: Ranked set sampling; simple random sampling; simulation study

ABSTRAK

Pelbagai kaedah pensampelan dicadangkan untuk menganggar median populasi. Dalam keadaan bila unit pensampelan senang untuk dipangkatkan berbanding dengan disukat, pensampelan set terpangkat didapati lebih cekap dan kos efektif berbanding dengan pensampelan rawak ringkas. Dalam kertas ini, kelebihan beberapa kaedah pensampelan set terpangkat ditunjukkan menerusi kajian simulasi. Di samping itu, beberapa tajuk baru dalam pensampelan set terpangkat dicadangkan.

Kata kunci: Kajian simulasi; pensampelan rawak ringkas; pensampelan set terpangkat

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*Pengarang untuk surat-menyurat; email: kamarulz@ukm.my