Given the null and alternative hypotheses, sample X1 = 149 Xy = 136 means, sample sizes, and population standard Ho: Hy - H2 20 Of = 11 02 = 13 deviations shown to the right, conduct a hypothesis HA: H, - H2 O B. 2 Calculate the value of the test statistic. z= (Round to two decimal places as needed.) Since the test statistic in the rejection region, the null hypothesis. There is evidence to conclude that the mean of population 1 is less than the mean of population 2