Hello all, I am trying to complete the following question by using keystrokes on my HP 12C calculator. I am having some trouble arriving at the proper standard deviation and was wondering if I could get some help.

Given the following data, calculate the expected return and the standard deviation for this portfolio: **Possible Return Probability of Return** -15% .20 0 .10

12% .32

16% .38

(a) Expected return: 6.92% Standard deviation: 25.23%

(b) Expected return: 6.92% Standard deviation: 11.85%

© Expected return: 3.25% Standard deviation: 11.85%

My current process is: f Sigma (above the f key); .15- ; enter ; .2 ; Sigma+ ; 0 ; enter ; .1 ; Sigma+ ; .12 ; enter ; .32 ; Sigma+ ; .16 ; enter ; .38 ; Sigma+. When i then press g ; . (s) it gives me a standard deviatoion of 12.49% although the answer is 11.85%. Could someone please guide me to what I’m doing wrong?

Thanks,