Average return=Total return/Total time period
=(20-12+17+20+10)/5=11%
Return | (Return-Average Return)^2 |
20 | (20-11)^2=81 |
-12 | (-12-11)^2=529 |
17 | (17-11)^2=36 |
20 | (20-11)^2=81 |
10 | (10-11)^2=1 |
Total=728% |
Standard deviation=[Total (Return-Average Return)^2/(Time period-1)]^(1/2)
=[728/(5-1)]^(1/2)
=[728/4]^(1/2)
=13.49%(Approx)
Variance=Standard deviation^2
=0.0182
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