STAT200 Quiz 2 Complete Solution 2
Peter said that the distribution A has fatter tail because its has bigger standard deviation than the distribution B. Rachael's answer is different:she thinks the distribution A has a smaller standard deviation than the distribution B.
Who do you think is right?
STAT200 Quiz 2 Complete Solution 2
Var(Pre-post) = Var(pre)+Var(post) – 2Cov(pre,post)
= Var(pre)+Var(post) –2*corr(pre,post)*S...
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