Two independent random samples were selected from the following two normally distributed populations with standard deviations, Sample 1 and Sample 2. If we use these samples to test a null hypothesis versus the alternative hypothesis H1 > H2 at a significance level of 0.05, then the test statistic is z = 2. We reject Ho if the test statistic is greater than 1.96 and we fail to reject Ho if the test statistic is less than or equal to 1.96. The probability that Ho is false is the probability that the test statistic is greater than 2.