What is the standard deviation for a stock that has had annual returns over the last four years of 6%, -4%, 8% and -12%? This is a sample not a population. O 8.3 9.6 8.7 9.3 9.0 Tir Att 1 H

What is the standard deviation for a stock that has had annual returns over the last four years of 6%,4%,8% and 12% ? This is a sample not a population. 83 98 8.7 9.3 9.0