Final answer:
Percentile scores are used to evaluate students' scores based on a predefined level of performance. They provide a standardized measure of a student's performance relative to others.
Step-by-step explanation:
If you are evaluating students' scores based on a predefined level of performance, the type of scores you are using are percentile scores. Percentile scores are useful for comparing values and determining a student's performance relative to others. For example, colleges and universities may use percentiles to set minimum testing scores for acceptance. Percentiles are calculated by determining the percentage of scores that are the same as or greater than a student's score. So, if a college accepts SAT scores at or above the 75th percentile, a score of at least 1220 would be required. Percentile scores provide a standardized measure of a student's performance and are commonly used in educational settings to evaluate student achievement and determine cutoff scores for various purposes.