Are you smarter than a second-grader? A random sample of 51 second-graders in a certain school district are given a standerdized mathematics skils test. The sample mean score is x44. Assume the standard deviation of test scores is o 15. The nationwide average score on this test is 50. The school superintendent wants to know vwhether the second-graders in her school district have different math skills from the nationwide eerge. Use theG-0.01 la of significance and the P-value method with the TI-84 calculator.

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