Are you smarter than a second-grader? A random sample of 61

Last updated: 7/13/2022

Are you smarter than a second-grader? A random sample of 61 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is x 51. Assume the standard deviation of test scores is a 10, The nationwide average score on this test is 54. The school superintendent wants to know whether the second-graders in her school district are different from the nationwide average. Use the a 0.01 level of significance and the critical value method.