2.) A sample is selected from a population with u = 80. After a treatment is administered to the individuals, the sample mean is found to be M = 75 and the variance is $2 = 100. a. If the sample has n = 4 scores, then calculate the estimated standard error and determine whether the sample is sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05. b. If the sample has n = 25 scores, then calculate the estimated standard error and determine whether the sample is sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05. c. Describe how increasing the size of the sample affects the standard error and the likelihood of rejecting the null hypothesis