A sample of n = 16 individuals is selected from a populationwith µ = 30. After a treatment is administered to the individuals,the sample mean is found to be M = 33. a. If the sample variance iss2 = 16, then calculate the estimated standard error and determinewhether the sample is sufficient to conclude that the treatment hasa significant effect? Use a two-tailed test with ? = .05. b. If thesample variance is s2 = 64, then calculate the estimated standarderror and determine whether the sample is sufficient to concludethat the treatment has a significant effect? Use a two-tailed testwith ? = .05. c. Describe how increasing variance affects thestandard error and the likelihood of rejecting the nullhypothesis
