Question: The following data is the sample returns for Stock A from t1 to t4 Based on the historical approach (sample approach), compute Stock A's variance.

The following data is the sample returns for Stock A from t1 to t4 Based on the historical approach (sample approach), compute Stock A's variance. Return t1 -0.14 t2 0.84 t3 0.87 t4 0.21
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