Are you smarter than a second-grader? A random sample of 55 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is x = 55. Assume the standard deviation of test scores is o = 10. The nationwide average score on this test is 51. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Use the a = 0.01 level of significance and the critical value method. Part: 0 / 5 Part 1 of 5 (a) State the appropriate null and alternate hypotheses. H : O

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