Are you smarter than a second-grader? g ti83 a random sample of 52 second-graders in a certain school district are given a standardized mathematics skills test. the sample mean score is =x56. assume the standard deviation of test scores is =σ18. the nationwide average score on this test is 50. the school superintendent wants to know whether the second-graders in her school district have different math skills from the nationwide average. use the =α0.05 level of significance and the p-value method with the ti-84 calculator. part 1 state the appropriate null and alternate hypotheses. h0: mu 50 h1: mu 50 this hypothesis test is a left-tailed test. part 2 out of 4 compute the p-value of the test statistic. round the p-value to four decimal places. p-value= [ ]