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Are you smarter than a second grader A random sample of 61 second graders in...

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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 45 Assume the standard deviation of test scores is a 20 The nationwide average score on this test is 50 The school superintendent wants to know whether the second graders in her school district have weaker math skills than the nationwide average Use the a 0 01 level of significance and the P value method with the TI 84 Plus calculator Part 1 of 5 a State the appropriate null and alternate hypotheses Ho dt 30 H 50 This hypothesis test is a left tailed Part 1 5 Part 2 of 5 test b Compute the value of the test statistic Round the answer to two decimal places

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