You are given the null and alternative hypotheses Ho: , 2 12 and HA: , ta/2- O B. to lay= O C. t ta/2- O B. to -ta= O c. t>ta= The test statistic is t = (Round to two decimal places as needed.) Since the test statistic in the rejection region, the null hypothesis. There is evidence at a = 0.05 to conclude that the mean of population 1 is less than the mean of population 2