这题不太懂SD是什么 为什么这么算？

请忽略上个提问 这个公式视频里没有讲呀？ 能不能详细讲一下？

Location-scale invariance indicates that if a random variable, X, is normally distributed, then Y will also be normally distributed even if X is multiplied by a factor or shifts. Random variables derived from other normally distributed random variables will also be normally distributed.

Location-scale invariance indicates that if a random variable, X, is normally distributed, then Y will also be normally distributed even if X is multiplied by a factor or shifts. Random variables derived from other normally distributed random variables will also be normally distributed.

答案是什么算法呢？

如何通过0.05得出95%？

老师你好，能够给我详细用例子讲一下看涨和看跌的有关怕什么做什么这一句话是什么意思吗？不是很理解

if rA > rM, can I think sigma A> sigma(risk higher, return higher) and then volatility A > volatility B

D WHY WELL-DIVERSIFIED HAS HIGHER UNSYSTEMATIC?

视频上还没讲到normal distribution，还是不太懂95%怎么来的？