ANALISIS PENGARUH SUB-KELOMPOK EMPAT, PULAU PAPUA DAN BULAN TERHADAP INDEKS HARGA KONSUMEN MENGGUNAKAN RANCANGAN BUJUR SANGKAR LATIN

Abstract

The purpose of this study is to analyze the differences between sub-groups, between provinces, and between months on the Consumer Price Index (CPI), and identify which factors are significantly different through follow-up tests. The method used is the Latin Longitude Scheme (RBSL) with three factors, namely the Group 4 sub-group as the treatment, six provinces as the first controlling factor, and January to June 2025 as the second controlling factor. The results of the variety analysis showed that the sub-group factor had a significant influence on the CPI with F_Calcul = 4,167 > F_Table= 2.71, as well as the provincial factor was significant, with F_Calcul = 3,687 > F_Table = 2.71, while the month factor did not have a significant effect because F_Calcul = 0.629, F_Table = 2.71. Through Duncan's follow-up test, it was found that the sub-group of Housing and Garden Equipment and Supplies (average = 109.43) was significantly different from several other sub-groups, and the province of Central Papua (average = 110.03) had significant differences from other provinces, so that these two factors were the main contributors to the variation in CPI values on the island of Papua.

Keywords: Consumer Price Index, Duncan Test, Latin Longitude Design (LLD), Variety Analysis