1. What is Percentile Rank?

The percentile rank indicates the percentage of scores in a distribution that a specific score is greater than or equal to. It helps understand relative standing in a group.

2. How Does the Calculator Work?

The calculator uses the percentile rank formula:

Where:

• \( \text{number\_below} \) — Count of values below the score of interest
• \( \text{number\_equal} \) — Count of values equal to the score of interest
• \( \text{total} \) — Total number of values in the distribution

Explanation: The formula accounts for both values below and equal to the score, with equal values split between the ranks.

3. Importance of Percentile Rank

Details: Percentile ranks are widely used in education, psychology, and statistics to compare individual performance against a reference group.

4. Using the Calculator

Tips: Enter the count of values below your score, count of equal values, and total number in distribution. All values must be non-negative integers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentile and percentile rank?
A: Percentile is the value below which a percentage of data falls, while percentile rank is the percentage of data at or below a specific value.

Q2: What does a percentile rank of 75 mean?
A: It means the score is equal to or better than 75% of the scores in the distribution.

Q3: How is this different from percentage?
A: Percentage is based on absolute performance (e.g., 80/100), while percentile rank shows relative standing in a group.

Q4: What are common uses of percentile ranks?
A: Standardized test scores, growth charts, employee performance evaluations, and statistical analysis.

Q5: Can percentile rank be more than 100?
A: No, percentile ranks range from 0 to 100, representing percentages of the distribution.