TY - JOUR AU - Latra, I Nyoman AU - Iriawan, Nur AU - Purhadi, Purhadi AU - Suhartono, Suhartono PY - 2012/06/29 TI - VARIASI VARIABEL PENGARUH FIX DAN RANDOM TERHADAP PRODUKSI GULA DAN TETES JF - Jurnal Ilmiah Matematika dan Pendidikan Matematika; Vol 4 No 1 (2012): Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP)DO - 10.20884/1.jmp.2012.4.1.2946 KW - N2 - This paper presents the modeling of the amount of sugar and molasses  production in Pabrik Gula Candi Baru Sidoarjo (PGCBS), East Java, by using multivariate  mixedlinear models. Estimation of parameters will be done by using maximum likelihood  coupled with restricted maximum likelihood methods. The amount of sugar and molasses  products which have strong linear correlation, will be set as responses and are supposed to  be affected by seven fixed effect variables and four random effect variables. This paper  demonstrates that the seven fixed effect variables and only one random effect variable have  significant influence on a single response. In the multivariate response modeling, however,  all of variables fail to explain the variability of these two responses simultaneously. It is due  to the factors matrix has no full rank. As a result, the model response of molasses can be  explained by using a model of the amount of sugar obtained. UR - http://jos.unsoed.ac.id/index.php/jmp/article/view/2946