Teaching Note: Percentile Rank 1. Introduction In statistics, percentile rank is used to understand the position of a score in a group of scores. It shows the percentage of scores that fall below a particular value. 2. Meaning / Definition Percentile Rank is the percentage of the total number of scores that lie below a given score in a distribution. In other words, it tells how well a student performs compared with others in the group. 3. Formula Percentile\ Rank = \frac{\text{Number of values below the score}}{\text{Total number of values}} \times 100 4. Example (Concept) Suppose a student scored 450 marks and the percentile rank is 80 . This means: 80% of students scored below 450 20% of students scored above 450 So the student performed better than 80% of students in that group. 5. Example Problem Find the percentile rank of 30 in the following data. Data: 10, 15, 20, 25, 30, 35, 40, 45 Step 1: Total number of values = 8 Step 2: Number of values below 30 = 4 (...