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.

Group of answer choices

1. The pooled estimator for the population standard deviation

2. The test statistic

3. The degrees of freedom of the test static