问题如下图：
选项：
A. 
B. 
C. 
解释：
第二个model的sample size是500， 从哪里看出来的？
NO.PZ201709270100000309问题如下 9.The best rationale for Quinni’s caution about the three-variable mol is ththe: pennt variable is finefferently. sample sizes are fferent in the two mols. vingrowth rate is positively correlatewith the other inpennt variables. B is correct. If we use austeR2 to compare regression mols, it is important ththe pennt variable finethe same win both mols anththe sample sizes useto estimate the mols are the same. Varn’s first mol wbaseon 40 observations, wherethe seconmol wbaseon 500. 老师没太懂这题问的是什么，并且解析也没看懂
NO.PZ201709270100000309 问题如下 9.The best rationale for Quinni’s caution about the three-variable mol is ththe: pennt variable is finefferently. sample sizes are fferent in the two mols. vingrowth rate is positively correlatewith the other inpennt variables. B is correct. If we use austeR2 to compare regression mols, it is important ththe pennt variable finethe same win both mols anththe sample sizes useto estimate the mols are the same. Varn’s first mol wbaseon 40 observations, wherethe seconmol wbaseon 500. 老师，请问下面题目中的这句话Varn answers both questions correctly ansays he wants to chetwo more ias. He believes the following:1. ROE is less correlatewith the vingrowth rate in firms whose CEO hbeen in offimore th15 years.这个意思不是说v growth rate和CEO tenure有关系吗？所以这道题我理解为这两个自变量有多重共线性的问题，选了C。
NO.PZ201709270100000309问题如下 9.The best rationale for Quinni’s caution about the three-variable mol is ththe: pennt variable is finefferently. sample sizes are fferent in the two mols. vingrowth rate is positively correlatewith the other inpennt variables. B is correct. If we use austeR2 to compare regression mols, it is important ththe pennt variable finethe same win both mols anththe sample sizes useto estimate the mols are the same. Varn’s first mol wbaseon 40 observations, wherethe seconmol wbaseon 500. 进来后，不会和tenure有关系，存在multi colline因此R高吗
NO.PZ201709270100000309 问题如下 9.The best rationale for Quinni’s caution about the three-variable mol is ththe: pennt variable is finefferently. sample sizes are fferent in the two mols. vingrowth rate is positively correlatewith the other inpennt variables. B is correct. If we use austeR2 to compare regression mols, it is important ththe pennt variable finethe same win both mols anththe sample sizes useto estimate the mols are the same. Varn’s first mol wbaseon 40 observations, wherethe seconmol wbaseon 500. 这题的考点是不是太偏了，好像基础课没提到吧？AUESTER还有A B 2个要求。
sample sizes are fferent in the two mols. vingrowth rate is positively correlatewith the other inpennt variables. B is correct. If we use austeR2 to compare regression mols, it is important ththe pennt variable finethe same win both mols anththe sample sizes useto estimate the mols are the same. Varn’s first mol wbaseon 40 observations, wherethe seconmol wbaseon 500. A下，，没看懂。
