Given that a portfolio’s return has a mean of 12% and a standard deviation of 14%, find the end points of its 95% confidence interval, assuming a normal distribution."
"The answers may be:
a) -2% and 26%
b) -15.2% and 38%
c) -16% and 40%
d) -1.9% and 24.7%
e) 12% and 14%