Independent random samples are selected from two populations and are used to test the hypothesis H0: 1m1 - m22 = 0 against the alternative Ha: 1m1 - m22  0. An analysis of 243 observations from population 1 and 323 from population 2 yielded a p-value of .125.

a. Interpret the results of the test.

b. If the alternative hypothesis had been Ha: 1m1 - m22 6 0, how would the p-value change? Interpret the p-value for LO5 this one-tailed test.