Browsing by Author "Sugiarto, S."
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Item INTERVAL KEPERCAYAAN UNTUK PERBEDAAN KOEFISIEN VARIASI DARI DISTRIBUSI LOGNORMAL(2014-03-25) Pebriyani, I.; Bustami; Sugiarto, S.This article discusses confidence interval for the difference of variation coefficients for lognormal distribution using the pivotal quantity, where pivotal quantity for the variation coefficients is unavailable, but there is a parameter having pivotal quantity in coefficients of variation i.e 2 . Therefore, 2 is constructed for pivotal quantity coefficients of variation using the Generalized Pivotal Approach (GPA). This confidence interval is shown in the term of coverage probabilities by implementing simulation studies with Matlab 7.6.0Item 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.