【 以下文字转载自 Statistics 讨论区 】 发信人: Morphea (scala & kolacny), 信区: Statistics 标 题: 请教一个chi-square fitting的问题 发信站: BBS 未名空间站 (Tue Jul 17 00:30:03 2012, 美东) I'm trying to fit data with linear rates of increase with one or more exponentials. Sometimes, i extract fit parameters with outrageous 95% C.I.s (i.e. A2 = 3.2 +/- 27909), while the fit is perfect. Does that mean this specific model is a bad fit?