【正文】
r it h m icP o w e rE x p o n e n t ia l4. logistic曲線擬合 XbbuY1011????X1098765432101Y26543210X1098765432101Y16543210模擬的數(shù)據(jù) 選擇 logistic;輸入 方程中 u的含義 ? Model whose equation is Y = 1 / (1/u + (b0 * (b1**t))) or ln(1/y1/u)= ln (b0) + (ln(b1)*t) where u is the upper boundary value. After selecting Logistic, specify the upper boundary value to use in the regression equation. The value must be a positive number, greater than the largest dependent variable value. ?本例實測 y的最大值為 ,取 u= 保留預(yù)測值 Independent: X Upper Dependent Mth Rsq . F Sigf bound b0 b1 Y1 LGS .997 7 .000 .4456 XbbuY1011????Y1X108642026543210O b s e r ve dLo g is t icXY11???? Independent: X Upper Dependent Mth Rsq . F Sigf bound b0 b1 Y2 LGS .997 7 .000 .0069 Y2X108642026543210O b s e r v e dLo g is t icXbbuY1011????XY11????估計值 回歸的用途之一 ?利用回歸方程進(jìn)行估計,通過易測變量估計難測變量。 ?今有光密度和甲醛溶液的成對數(shù)據(jù)如下,試建立 y關(guān)于 x的回歸方程,對一批未知濃度的甲醛溶液濃度進(jìn)行測量。 甲醛溶液濃度 x 光密度 y YX. . 0.7.6.5.4.3.2.10 . 0O b s e r v e dLi n e a rIndependent: X Dependent Mth Rsq . F Sigf b0 b1 Y LIN .971 3 .002 .0464 .8247 ? ? 8 2 4 8 2 4 4 6 ????YXXY未知溶液濃度樣品的光密度 , , , , ~ ? ? 8 2 4 8 2 4 4 6 ????YXXY作業(yè): P218 ? 5