The formula to calculate Handicap Index is:
\[ \text{Handicap Index} = \frac{\sum \text{Best Differentials}}{\text{Number of Differentials}} \]
Where:
The Handicap Index is a measure of a golfer's potential ability on a course of standard playing difficulty.
Course Rating is the evaluation of the playing difficulty of a course for a scratch golfer under normal course and weather conditions.
Slope Rating is the evaluation of the relative playing difficulty of a course for a bogey golfer compared to a scratch golfer.
Let's assume the following values:
Using the formula:
\[ \text{Handicap Index} = \frac{\sum \text{Best Differentials}}{\text{Number of Differentials}} \]
Evaluating:
The Handicap Index is calculated based on the best 8 differentials from the 20 scores.
| Scores | Course Rating | Slope Rating | Handicap Index |
|---|---|---|---|
| 85, 87, 90, 88, 86, 84, 89, 91, 92, 88, 87, 85, 86, 90, 89, 88, 87, 85 | 72 | 113 | 13.63 |