MULTILEVEL NON-LINIER REGRESSION FOR REPEATED MEASURMENT DATA AS STUDY OF PEANUT GROWTH

  • Arie Purwanto Mathematic Study Program, Faculty of Teacher Training and Education, Mercu Buana Yogyakarta University
  • Umul Aiman Agrotechnology, Faculty of Agroindustry, Mercu Buana Yogyakarta University
DOI: https://doi.org/10.30598/barekengvol16iss3pp861-868
Keywords: peanut, regression, multilevel

Abstract

Peanut is one of the most important legume commodities in Indonesia. In its implementation, a lot of research has been done related to this plant. However, in studies conducted by growth models, it is very rarely studied. Therefore, researchers are interested in modeling the growth of peanuts. One of the models that can be used is a multilevel regression model for the case of repeated measurement data. Multilevel regression was chosen because it is considered to provide more information than other regression models. On the other hand, the nonlinear model was chosen based on the tendency of the initial plot of the data obtained. The research method used is a case study in the study of peanut growth. This study aims to build the best model based on the tested model. The Restricted Estimator Maximum Likelihood (REML) parameter estimation method was chosen because it is considered to have unbiased parameter estimates. The best model is based on the lowest Akaike Information Criterion (AIC) generated from a predetermined model. The results obtained indicate that the multilevel parabolic regression model is the model with the best AIC size. In addition, it was found that there was an Interclass Correlation (ICC) of 81.19% which indicated a difference in variability between levels.

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Published
2022-09-01
How to Cite
[1]
A. Purwanto and U. Aiman, “MULTILEVEL NON-LINIER REGRESSION FOR REPEATED MEASURMENT DATA AS STUDY OF PEANUT GROWTH”, BAREKENG: J. Math. & App., vol. 16, no. 3, pp. 861-868, Sep. 2022.
Issue
Vol 16 No 3 (2022): BAREKENG: Journal of Mathematics and Its Applications
Section
Articles

Copyright (c) 2022 Arie Purwanto, Umul Aiman

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