A random sample is selected from a normal population with a mean of u=100 and a standard deviation of o-15. After a treatment is administered to the individuals in the sample, the sample mean is found to be M=105. Round all final answers to two decimal places. 1. If the sample consists of n=9 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a=.05. SHOW YOUR WORK! Reject or fail to reject the Null Hypothesis: 2. If the sample consists of n = 25 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a=.05. SHOW YOUR WORK! Z': Reject or fail to reject the Null Hypothesis: 3. If the sample consists of n = 100 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a=.05. SHOW YOUR WORK! Z: Reject or fail to reject the Null Hypothesis