The National Assessment of Educational Progress (NAEP) for fourth grade science students in public schools assessment was updated in 2009 to keep pace with key developments in science. Student performance is presented in terms of average scores on a scale from 0 to 300 with a mean of 138 and a standard deviation of 45. Scores are reported by state. The sample of 85 Texas students scored an average of 149. Can you prove that Texas students are smarter on average than the rest of the nation