Are you smarter than a secondgrader? A random sample of 55 secondgraders in a certain school district are given a standardized mathematics skills test. The sample mean score is g : 49. Assume the standard deviation of test scores is 0 : 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the secondgraders in her school district have weaker math skills than the nationwide average. Use the (1 : 0.01 level of signicance and the P-value method with the TI-84 calculator. Part 1 of4 State the appropriate null and alternate hypotheses. H0 'm' | = H1 :l u