The t-test is used with interval and nominal data.

One assumption in most waiting line analyses is that the number of customers is ________

Fill in the blank with the appropriate word.

Sharpe's measure of portfolio performance compares the risk premium on a portfolio to

A) a broad-based market index such as the S&P 500 index. B) the portfolio's standard deviation of return. C) the portfolio's beta. D) the prevailing risk-free rate of return.