Hi, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for The Weta Cave.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
The Weta Cave
Valid Reviews
52 Valid Reviews
The The Weta Cave experience has a total of 52 valid reviews. There are no invalid reviews that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 52 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 15 |
|
29% |
| 9/10 | 14 |
|
27% |
| 8/10 | 11 |
|
21% |
| 7/10 | 7 |
|
13% |
| 6/10 | 2 |
|
4% |
| 5/10 | 2 |
|
4% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
2% |
| 1/10 | 0 |
|
0% |
84.04% Average
The raw data average (mean) for all the The Weta Cave valid reviews is 84.04% and is based on 52 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
50 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 52 valid reviews, the experience has 50 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 50 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 13 |
|
26% |
| 9/10 | 14 |
|
28% |
| 8/10 | 11 |
|
22% |
| 7/10 | 7 |
|
14% |
| 6/10 | 2 |
|
4% |
| 5/10 | 2 |
|
4% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
2% |
| 1/10 | 0 |
|
0% |
83.40% Average
The raw data average (mean) for all the The Weta Cave face-to-face reviews is 83.40% and is based on 50 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
85.28%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Harriet and Paul | 9/10 | 2827 days | 100% |
| Margot | 7/10 | 2897 days | 89% |
| Bjorn Nielsen | 9/10 | 2899 days | 95% |
| Rose Guillaume | 10/10 | 2921 days | 95% |
| Pierre Landenne | 7/10 | 2921 days | 88% |
| Simeon Manz | 10/10 | 2933 days | 94% |
| Selma Franke | 8/10 | 2940 days | 91% |
| MARK CURPHEY | 10/10 | 2950 days | 93% |
| Sam Taylor | 8/10 | 2951 days | 91% |
| Dave Ellis | 8/10 | 2951 days | 91% |
| tinagermany111 | 5/10 | 2970 days | 68% |
| Thomas Le Buzulier | 10/10 | 3164 days | 78% |
| Daniel Idiart | 10/10 | 3169 days | 78% |
| Liam King | 9/10 | 3170 days | 77% |
| Matthew Baker | 9/10 | 3170 days | 77% |
| Karin Karlsson | 8/10 | 3173 days | 76% |
| Hana Rachfalik | 10/10 | 3176 days | 77% |
| Anthony | 8/10 | 3178 days | 75% |
| Ann-Kathrin | 8/10 | 3202 days | 74% |
| Emma Burtscher | 2/10 | 3210 days | 31% |
| Jan | 10/10 | 3213 days | 75% |
| Briony | 8/10 | 3214 days | 73% |
| David Schelensky | 10/10 | 3214 days | 74% |
| Sascha Daub | 8/10 | 3215 days | 73% |
| Richard Starkeq | 9/10 | 3215 days | 74% |
| Robin Ings | 6/10 | 3219 days | 63% |
| Flo and Frieda | 7/10 | 3238 days | 67% |
| Pierre Planchez | 9/10 | 3583 days | 49% |
| Lukas Dost | 10/10 | 3598 days | 48% |
| Greg Little | 10/10 | 3599 days | 48% |
| Iana Pauga | 10/10 | 3609 days | 47% |
| Astrid Egesten | 9/10 | 3648 days | 44% |
| James Russell | 8/10 | 3892 days | 27% |
| Hannah Watt | 7/10 | 3892 days | 26% |
| Jan Legein | 9/10 | 3893 days | 28% |
| Herman Schulz | 8/10 | 3918 days | 26% |
| Rhys Williams | 9/10 | 3940 days | 24% |
| Dan Lawson | 10/10 | 3956 days | 24% |
| Paul Taylor | 5/10 | 4274 days | 0% |
| Cloarec Guillaume | 10/10 | 4276 days | 2% |
| Clodec | 9/10 | 4276 days | 2% |
| Michal | 9/10 | 4285 days | 1% |
| Roshnie | 7/10 | 4381 days | 27% |
| Frederick Neilsen | 9/10 | 4383 days | 29% |
| Frank Claassen | 8/10 | 4642 days | 29% |
| Kimberley Mills | 9/10 | 4662 days | 29% |
| Helen & Laurence | 7/10 | 4744 days | 27% |
| Dave van Bergen | 9/10 | 4976 days | 29% |
| Anika Jedelsky | 10/10 | 5013 days | 30% |
| Kathryn Knipe | 6/10 | 5030 days | 25% |
| Stefan Morris | 7/10 | 5031 days | 27% |
| lindam | 10/10 | 5346 days | 30% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The The Weta Cave experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.04% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 days. However the The Weta Cave experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The The Weta Cave experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.98% |
| 198 | -4.00% |
| 199 | -4.02% |
| 200 | -4.04% |
| 201 | -4.06% |
| 202 | -4.08% |
| 203 | -4.10% |
| … | … |
Balancing Adjustment
2.67% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
84%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.