<P> Test scores are interpreted with a norm - referenced or criterion - referenced interpretation, or occasionally both . A norm - referenced interpretation means that the score conveys meaning about the examinee with regards to their standing among other examinees . A criterion - referenced interpretation means that the score conveys information about the examinee with regard to a specific subject matter, regardless of other examinees' scores . </P> <P> There are two types of test scores: raw scores and scaled scores . A raw score is a score without any sort of adjustment or transformation, such as the simple number of questions answered correctly . A scaled score is the results of some transformation applied to the raw score . </P> <P> The purpose of scaled scores is to report scores for all examinees on a consistent scale . Suppose that a test has two forms, and one is more difficult than the other . It has been determined by equating that a score of 65% on form 1 is equivalent to a score of 68% on form 2 . Scores on both forms can be converted to a scale so that these two equivalent scores have the same reported scores . For example, they could both be a score of 350 on a scale of 100 to 500 . </P> <P> Two well - known tests in the United States that have scaled scores are the ACT and the SAT . The ACT's scale ranges from 0 to 36 and the SAT's from 200 to 800 (per section). Ostensibly, these two scales were selected to represent a mean and standard deviation of 18 and 6 (ACT), and 500 and 100 . The upper and lower bounds were selected because an interval of plus or minus three standard deviations contains more than 99% of a population . Scores outside that range are difficult to measure, and return little practical value . </P>

What is the standard error and what would be a short (1-sentence) interpretation of this number