问题如下:
Based on past research, Hansen selects the following independent variables to predict IPO initial returns:
Underwriter rank = 1–10, where 10 is highest rank
Pre-offer price adjustment (Expressed as a decimal) = (Offer price – Initial filing price)/Initial filing price
Offer size ($ millions) = Shares sold × Offer price
Fraction retained (Expressed as a decimal) = Fraction of total company shares retained by insiders
Hansen collects a sample of 1,725 recent IPOs for his regression model.
\Hansen’s Regression Results Dependent Variable: IPO Initial Return (Expressed in Decimal Form, i.e., 1% = 0.01)
The 95 percent confidence interval for the regression coefficient for the pre-offer price adjustment is closest to:
选项:
A.0.156 to 0.714.
B.0.395 to 0.475.
C.0.402 to 0.468.
解释:
B is correct.
The 95% confidence interval is 0.435 ± (0.0202 × 1.96) = (0.395, 0.475).
老师好 查表得T critical 的时候怎么判断alpha = 0.05 or 0.025? 在求confidence interval 的时候。 假设检验的时候是看Ha 的是吗? Ha 中的是> 那么拒绝区域就在图的右边 如果小于, 拒绝区域在图的左边, 如果是不等于, 那就是两边(双尾) 也就是IF ALPHA =0.05, 那我们查表格的时候就看alpha = 0.025 是吗? 然后等号永远在原假设里的是吗 ?谢谢