The overall rating of a rum on RumX is not based on the average, but on the median of all community ratings. This means:
- Outliers are automatically ignored – regardless of whether someone gives 1.0 or 10.0 points.
- The median is significantly more robust than the average and protects the rating from extremely high or low individual opinions.
- Only when at least 4 ratings from community members are available is an overall rating displayed.
This also explains why your rating sometimes has a strong impact (e.g., if you are the fourth person to submit a rating and the median shifts) and sometimes has no impact (if there are already many ratings and your value is in the “middle range”).
We discussed this in detail over three years ago:
X2 App Feedback – Community discussion on the rating formula
Cheers! 
