Therefore, if a test is reliable, it should be meaningful. Validity refers to the test taking. The test is actually measuring what students are learning. Test publishing companies are very concerned about reliability and validity. They carefully monitor the reliability of standardized tests.
Validity is a factor that is more difficult to control.
These scores can be utilized to evaluate a school district, a school, a particular education program, a teacher, and a student. A student who scores a NP of 65 fits on the curve where 35 scores are better and 65 scores are lower. A student who scores a NP of 50 is exactly in the middle of the test group. The NP is used to determine a stanine score. A student who's percentile rank is 50 will have a stanine of 5.