.Sample sizes and rounding can result in apparent inconsistencies. For example, in the table above for both 2003 and 2005, the percentage of fourth-grade students performing at or above Basic in public schools nationwide is 62, yet the numbers are marked as being statistically different. The actual unrounded numbers are 61.57 in 2003 and 62.47 in 2005, a 0.9 percentage point difference that is statistically significant, due in part to the large numbers of students who participated in NAEP in those two years.
More information about the state NAEP reading assessment and achievement levels is available on the NAEP website.
More information about state performance is available in the State Profiles tool.
View information about the percentage of students with disabilities and English language learners identified, excluded, and assessed at the state level.