Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
Averaging the values of ybar_st gives E(ybar_st) = 4 = Ybar. Then square and average the last column to get var(ybar_st) = 85/36. The rest of this problem is just ...
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