A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is XXXXXXXXXXAssume the standard deviation for the population...

A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is 51.13 . Assume the standard deviation for the population of test scores is 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Perform the hypothesis test and compute theP-value.