Which stock is a better investment choice? A. Walmart OB. Target What is the standard deviation of Target's returns? Suppose in the last month we have weekly returns for two stocks, they are as follows: Stock Week 1 Week 2 Week 3 Week 4 Walmart 3.50% 2.50% 1.10% -4.10% Target 6.30% 3.50% 0.70% -3.00%