A portfolio consisting of four stocks is expected to produce returns of -9%, 11%, 13% and 17%, respectively, over the next four years. What is the standard deviation of these expected returns?

One roadblock for ERP systems is that they require a substantial investment in order to be successful

Indicate whether the statement is true or false

PayPal is an example of a(n):

A) online stored value payment system. B) digital checking system. C) accumulating balance system. D) digital credit card system.