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séries univariantes de tempo - metodologia de Box & Jenkins

séries univariantes de tempo - metodologia de Box & Jenkins

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138Quadro 7Previsão para os valores mensais do IPC — 1982MESESVALOR.PREVISTOINTERVALO DECONFIANÇA(<strong>de</strong> 95%)VALOR REAL-MENTE OCOR-RIDOPERCENTUALDE ERROJan.2408 ,8(2333,9;2486, 1) 2 390,000,79Fev.2538 ,2(2415 ,5;2667, 2) 2 556,000,69Mar.2674 ,6(2501 ,8;2859, 3) 2 785,003,96Abr.2818 ,3(2590 ,5;3066, 1) 2 934,003,94Maio2969 ,7(2680,9;3289, 5)Jun.3129 ,2(2772 ,7;3531, 6)Jul.3297 ,3(2855 ,5;3794, 2)Ago.3 474,5(2959,4;4079, 3)Set.3661 ,2(3054,i;4388, 9)Out.3857 ,8(3149,6;4725, 4)Nov.4065 ,1(3245 ,8;5091, 2)Dez.4284 ,5(3342,6;5489, 2)'NOTA: O percentual <strong>de</strong> erro i obtido através da diferença entre o valorprevisto e o valor realmente ocorrido dividida pelo valor realmenteocorrido.

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