A newspaper reporter claims that your school district is doing poorly in training High School students. She claims that your HS graduates score is lower than the national average SAT score of 495. She drew a random sample of 300 HS graduates in the district and asked their SAT scores. She found a sample mean SAT= 491 and sample st. dev. = 40. Use these results to examine whether there is a significant difference between the average SAT score in your school district and the national average at the .05 level of error. State your conclusion in one complete sentence.