For high school and university students, test results for students and parents could be the same. For parents, if any information about how they can help student can be useful. For example, if the student is having a serious problem keeping up with the class, he or she may need extra instruction to pass the entrance examinations, etc. In any case, students and their parents are not likely to be familiar with testing, statistics, or English instruction. Technical terms should be avoided, unless an easy definition included, and explanations should not be too technical.
Less information is necessary about the test itself, how it is administered, etc.
Administrators Administrators may not know anything with English language teaching. They are interested in selecting or placing students. It is not important to describe in detail individual student's weaknesses in English or problems they have. However, it is important to explain what the scores mean, how students could be classified, and what the reasons are for those classificiations. They need concrete standards to use to decide cutoff points.