Please use the information below to answer the question. A random sample of 36 scores is selected from a normal population with a mean of mu equal to 25. After a treatment is administered to the individuals in the sample, the sample mean is found to be M equal to 34. If the population standard deviation is sigma equal to 8, is the sample mean sufficient to conclude that the treatment has a significant effect? Use an alpha level of 5%. What are the critical values? 1.64 and -1.64 1.96 and -1.96 O 0.05 and 5% O -1.96 and 1.64