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Vol 16 No 4 (2022): BAREKENG: Journal of Mathematics and Its Applications
Articles

THE USE OF PENALIZED WEIGHTED LEAST SQUARE TO OVERCOME CORRELATIONS BETWEEN TWO RESPONSES

Anna Islamiyati
Department of Statistics, Faculty of Mathematics and Natural Sciences, Hasanuddin University
Anisa Anisa
Department of Statistics, Faculty of Mathematics and Natural Sciences, Hasanuddin University
Muhammad Zakir
Department of Mathematics, Faculty of Mathematics and Natural Sciences, Hasanuddin University,
Nasrah Sirajang
Department of Statistics, Faculty of Mathematics and Natural Sciences, Hasanuddin University
Ummi Sari
Hasanuddin University Teaching Hospital
Fajar Affan
Department of Statistics, Faculty of Mathematics and Natural Sciences, Hasanuddin University
Muhammad Jayzul Usrah
Department of Statistics, Faculty of Mathematics and Natural Sciences, Hasanuddin University
Published December 15, 2022
Keywords
  • age,
  • height,
  • knots,
  • two responses,
  • weighted penalized,
  • weight
  • ...More
    Less
How to Cite
[1]
A. Islamiyati, “THE USE OF PENALIZED WEIGHTED LEAST SQUARE TO OVERCOME CORRELATIONS BETWEEN TWO RESPONSES”, BAREKENG: J. Math. & App., vol. 16, no. 4, pp. 1497-1504, Dec. 2022.

Abstract

The non-parametric regression model can consider two correlated responses. However, for these conditions, we cannot use the usual estimation process because there are violations of assumptions. To solve this problem, we use a penalized weighted least square involving knots, smoothing parameters, and weighting in the estimation criteria simultaneously. The estimation process involves a weighted criteria matrix  in the estimation criteria. Estimation results show that the estimated two-response non-parametric regression function with penalized spline is a linear estimation class in y response observation and depends on the knot point and smoothing parameter. Furthermore, the use of the model on toddler growth data shows some changes in the pattern of weight and height gain. The pattern segmentation that experienced a gradual increase was age 7-43 months for weight and age 6-54 months for height

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