Suppose the hypotheses that the magazine wanted to test are:

H0:GD=0

Ha:GD0

For the global market, the magazine found an average of 12.9% return over five years, while for the U.S. market it found an average of 10.1%. Suppose that both numbers are based on random samples of 50 investments in each market, with a standard deviation of 6.2% in the global market and 5.5% in the U.S. market. Assume that the standard deviations of the populations of the two markets are equal.