4.2 問題與解答(p137)
已知:
求算:
當身高各是:65 70 74 英吋,其體重為:
當身高每長 1.5 英吋,其體重增加為:3.94 * 1.5 = 5.91
若度量衡改為公制,回歸公式及其他統計數據為:
Height公制 = 2.54 * Height英制
Weight公制 = Weight英制/2.2
Weight公制 * 2.2 = -99.41 + 3.94 * (Height公制/2.54)
Weight公制 = (-99.41 + 3.94 * (Height公制/2.54)) / 2.2 = -45.19 + 0.71 * Height公制
SER2 = SSR /(n - 2) = 10.22, n = 200
SSR = 10.22 * 198 = 20599.92
R2 = 1 - (SSR / TSS) = 0.81
TSS = σ2 = SSR / 0.19 = 108420.6
σ = 329.27
TSS = ESS + SSR
ESS = TSS - SSR = 108420.6 - 20599.92 = 87820.68