Precision Ranking of Double Sampling and Sampling on Successive Occasions in Specific Distributions

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Year:
2021
Type of Publication:
Article
Keywords:
Sampling, Optimum, Population, Gamma distribution, Correlation Coefficient
Authors:
Adekunle Nurudeen Masopa; Oyekunle Janet Olufunmike; Olalekan Ayodeji Olaleye; Agbona Anthony Adisa
Journal:
IJISM
Volume:
9
Number:
5
Pages:
78-86
Month:
September
ISSN:
2347-9051
Abstract:
The accuracy of estimates depends largely on the appropriateness of sampling methods adopted for the study. Precision of closely related sampling methods may be at variance with minimum cost of survey. The focus of samplers is to adopt a sampling method which can guarantee optimum precision at minimum cost. The central idea of this study is to examine the precision of two closely related sampling techniques with little dissimilarities in the procedures for a case where the data exhibits known distribution. Double sampling with attention on ratio as well as regression estimators and sampling on successive occasions were used for a normally distributed population and Skewed (Gamma) population. The second stage sample was considered to be the matched pairs in sampling on successive occasions which was varied from 10% to 90% to know the effect of sample size on the precision of the methods. The result revealed that sampling on successive occasion is better than both the ratio and regression estimators of double sampling in terms of precision across the three correlation coefficients for Skewed distribution while ratio estimator for double sampling has the least precision. The regression estimator for double sampling performs better than its ratio counterpart for double sampling and sampling on successive occasion under a normally distributed data case across three correlation coefficients while its ratio counterpart has the least.

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