Temat: relative efficiency - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: On the improvement of paired ranked set sampling to estimate population mean
Autorzy:: Rehman, Syed Abdul
Shabbir, Javid
Powiązania:: https://bibliotekanauki.pl/articles/1827556.pdf
Data publikacji:: 2021-09-06
Wydawca:: Główny Urząd Statystyczny
Tematy:: order statistics
ranked set sampling
relative efficiency
unbiased estimator
imperfect ranking
Opis:: In ecological and environmental sampling the quantification of units is either difficult or overly demanding in terms of the time, money, workload, it requires. For this reason efficient and cost-effective sampling methods need to be devised for data collecting. The most commonly used method for this purpose is the Ranked Set Sampling (RSS). In this paper, a sampling scheme called Improved Paired Ranked Set Sampling (IPRSS) is proposed to estimate the population mean. The performance of the proposed IPRSS is evaluated under perfect and imperfect rankings. A simulation study based on selected hypothetical distributions and a real-life data set showed that IPRSS is more precise than RSS, Paired RSS (PRSS) or Extreme RSS (ERSS).
Źródło:: Statistics in Transition new series; 2021, 22, 3; 193-205
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Two-stage cluster sampling with unequal probability sampling in the first stage and ranked set sampling in the second stage
Autorzy:: Ugwu, Michael C.
Madukaife, Mbanefo S.
Powiązania:: https://bibliotekanauki.pl/articles/2108165.pdf
Data publikacji:: 2022-09-14
Wydawca:: Główny Urząd Statystyczny
Tematy:: cluster sampling
population mean estimator
probability proportional to size sampling
ranked set sampling
relative efficiency
Opis:: In this research work we introduce a new sampling design, namely a two-stage cluster sampling, where probability proportional to size with replacement is used in the first stage unit and ranked set sampling in the second in order to address the issue of marked variability in the sizes of population units concerned with first stage sampling. We obtained an unbiased estimator of the population mean and total, as well as the variance of the mean estimator. We calculated the relative efficiency of the new sampling design to the two-stage cluster sampling with simple random sampling in the first stage and ranked set sampling in the second stage. The results demonstrated that the new sampling design is more efficient than the competing design when a significant variation is observed in the first stage units.
Źródło:: Statistics in Transition new series; 2022, 23, 3; 199-214
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

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