Browsing by Author "Sirait, H."

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    KOMBINASI PENAKSIR RASIO-PRODUK PROPORSI EKSPONENSIAL UNTUK RATA-RATA POPULASI PADA SAMPLING ACAK SEDERHANA
    (2014-03-25) Indrayani, A. F.; Efendi, R.; Sirait, H.
    Three estimators discussed in this paper are the Exponential Proportions Ratio Estimator, The Product Estimator Exponential Proportion, and The Combination-Product Ratio Exponential Proportions Estimator on simple random sampling proposed by Singh et. al. [Pakistan Journal of Statistics and Operations Research, 1(2): 18-32]. The three proposed estimators are biased estimators. Then the mean square error of each estimator is evaluated. Furthermore, the mean square errors are compared to obtain the most efficient one. A numerical example is given at the end of discussion.
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    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