estatistica

# estatistica - LISTA DE EXERCCIOS DE REGRESSO E CORRELAO...

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LISTA DE EXERCÍCIOS DE REGRESSÃO E CORRELAÇÃO Para os quatro exemplos abaixo calcular e interpretar r, r 2 , a e b. Testar o coeficiente de correlação usando alfa de 0,05. Exemplo 1: Anos de estudo e salário x y xy x 2 y 2 2 8 16 4 64 3 9 27 9 81 5 10 50 25 100 7 11 77 49 121 8 12 96 64 144 25 50 266 151 510 Usando regressão estimar o salário de quem estudou 4 anos. Exemplo 2: Horas de estudo e notas num teste x y xy x 2 y 2 2 89 178 4 7921 3 95 285 9 9025 6 80 480 36 6400 4 82 328 16 6724 6 85 510 36 7225 4 90 360 16 8100 7 75 525 49 5625 5 70 350 25 4900 4 91 364 16 8281 8 93 744 64 8649 8 74 592 64 5476 57 924 4716 335 78326 Usando regressão estimar a nota de quem estudou 4,5 horas. Exemplo 3: Temperatura e crimes violentos Obs:crimes/mil residentes x y xy x 2 y 2 29 3,5 101,50 841 12,25 22 3,2 70,40 484 10,24 30 5,1 153,00 900 26,01 28 4,0 112,00 784 16,00 20 3,6 72,00 400 12,96 26

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