问题如下：
a. What are the standard errors of and ?
选项：
解释：
The standard error for beta is
The standard error for alpha is
这里的公式是哪个呢？
NO.PZ202001080100001201 问题如下 Whare the stanrerrors of α^\wihat\alphanβ^\wihat\betaβ? The stanrerror for beta is 20.38240∗19.82=0.065\sqrt{\frac{20.38}{240*19.82}}=0.065240∗19.8220.38=0.065The stanrerror for alpha is 20.38∗(0.712+19.82)240∗19.82=0.295\sqrt{\frac{20.38*(0.71^2+19.82)}{240*19.82}}=0.295240∗19.8220.38∗(0.712+19.82)=0.295 Beta、Alpha的标准误在新考纲范围内吗
NO.PZ202001080100001201问题如下Whare the stanrerrors of α^\wihat\alphanβ^\wihat\betaβ? The stanrerror for beta is 20.38240∗19.82=0.065\sqrt{\frac{20.38}{240*19.82}}=0.065240∗19.8220.38=0.065The stanrerror for alpha is 20.38∗(0.712+19.82)240∗19.82=0.295\sqrt{\frac{20.38*(0.71^2+19.82)}{240*19.82}}=0.295240∗19.8220.38∗(0.712+19.82)=0.295老师，你在解答中提到的公式也是针对Alpha的，但是请问计算Beta的公式是什么呀？
NO.PZ202001080100001201 请老师讲一下解题思路
S^2是谁的什么
