Kia ora, 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 Waitomo Adventures Ltd.
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.
Waitomo Adventures Ltd
Valid Reviews
93 Valid Reviews
The Waitomo Adventures Ltd experience has a total of 94 reviews. There are 93 valid reviews that are included when calculating the ranking score and 1 invalid review 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 93 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 32 |
|
34% |
| 9/10 | 22 |
|
24% |
| 8/10 | 23 |
|
25% |
| 7/10 | 8 |
|
9% |
| 6/10 | 5 |
|
5% |
| 5/10 | 2 |
|
2% |
| 4/10 | 0 |
|
0% |
| 3/10 | 1 |
|
1% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
86.13% Average
The raw data average (mean) for all the Waitomo Adventures Ltd valid reviews is 86.13% and is based on 93 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
77 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 93 valid reviews, the experience has 77 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 77 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 23 |
|
30% |
| 9/10 | 20 |
|
26% |
| 8/10 | 20 |
|
26% |
| 7/10 | 8 |
|
10% |
| 6/10 | 3 |
|
4% |
| 5/10 | 2 |
|
3% |
| 4/10 | 0 |
|
0% |
| 3/10 | 1 |
|
1% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
85.32% Average
The raw data average (mean) for all the Waitomo Adventures Ltd face-to-face reviews is 85.32% and is based on 77 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
87.90%
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 |
|---|---|---|---|
| Dennis | 10/10 | 2883 days | 100% |
| Thomas Klinting | 10/10 | 2937 days | 96% |
| Franz Mesey | 9/10 | 2951 days | 94% |
| Judit Van lanen | 10/10 | 2970 days | 94% |
| Jack Robinson | 8/10 | 3008 days | 90% |
| Mikulas and Dominika | 8/10 | 3030 days | 88% |
| Elizabeth Braidotti | 10/10 | 3080 days | 87% |
| Craig Forsyth | 10/10 | 3196 days | 79% |
| Lea Behnem | 10/10 | 3270 days | 74% |
| Nicolas Justin | 7/10 | 3614 days | 47% |
| Stephanie Piou | 8/10 | 3614 days | 49% |
| Alex | 9/10 | 3642 days | 48% |
| Devan Sheppard | 10/10 | 3711 days | 44% |
| Nina Coopmans | 7/10 | 4323 days | 2% |
| Katherine | 10/10 | 4347 days | 0% |
| Lieven De Vlaminck | 9/10 | 4353 days | 0% |
| Andy | 10/10 | 4444 days | 33% |
| Ron | 9/10 | 4448 days | 33% |
| Bart Slingerland | 9/10 | 4703 days | 33% |
| Birds Tubbs | 10/10 | 4704 days | 33% |
| Malena | 10/10 | 4719 days | 33% |
| Schael | 10/10 | 4723 days | 33% |
| Ryan Pynappels | 9/10 | 4730 days | 33% |
| Tobias Forst | 8/10 | 4811 days | 32% |
| Sarah and Soren | 9/10 | 4816 days | 33% |
| Alberto Redner | 10/10 | 4826 days | 33% |
| Dozza | 10/10 | 4871 days | 33% |
| Sarah James | 10/10 | 5053 days | 33% |
| Nick Taylor | 10/10 | 5053 days | 33% |
| Laurent P | 10/10 | 5057 days | 33% |
| Paap | 8/10 | 5090 days | 32% |
| Wouter Jansen | 8/10 | 5090 days | 32% |
| Luise Jaeger | 3/10 | 5103 days | 17% |
| Steff | 9/10 | 5105 days | 33% |
| wannaraft | 10/10 | 5113 days | 33% |
| elpo | 6/10 | 5358 days | 28% |
| kempt | 8/10 | 5389 days | 32% |
| Andy | 8/10 | 5440 days | 32% |
| Sam Bishop | 10/10 | 5450 days | 33% |
| Kay Beaumont | 10/10 | 5452 days | 33% |
| Johan | 10/10 | 5460 days | 33% |
| Jakob Pedersen | 7/10 | 5460 days | 31% |
| Jens van Evp | 9/10 | 5474 days | 33% |
| Max Van der Zalm | 8/10 | 5474 days | 32% |
| Carolina Gonzalez | 8/10 | 5476 days | 32% |
| Kasper | 9/10 | 5476 days | 33% |
| Chance McGuire | 10/10 | 5478 days | 33% |
| katesc | 9/10 | 5529 days | 33% |
| rosalindm | 9/10 | 5534 days | 33% |
| jennyb | 9/10 | 5538 days | 33% |
| Thomas Willi | 10/10 | 5550 days | 33% |
| Jess Pasos | 10/10 | 5559 days | 33% |
| Nikki Turner | 8/10 | 5705 days | 32% |
| Sejna | 8/10 | 5726 days | 32% |
| michellew | 10/10 | 5732 days | 33% |
| erikholland | 8/10 | 5784 days | 32% |
| mariea | 9/10 | 5795 days | 33% |
| Krapels | 9/10 | 5808 days | 33% |
| Halley | 5/10 | 5814 days | 25% |
| Katie | 10/10 | 5832 days | 33% |
| Ian S | 8/10 | 5833 days | 32% |
| Debbie | 7/10 | 5834 days | 31% |
| Daniel | 8/10 | 5843 days | 32% |
| Kristy825 | 10/10 | 5846 days | 33% |
| Limor | 6/10 | 5855 days | 28% |
| Prentner | 6/10 | 5864 days | 28% |
| Sonja | 9/10 | 5888 days | 33% |
| Bronagh Mcartan | 9/10 | 6032 days | 33% |
| Tim | 10/10 | 6056 days | 33% |
| Brent Scanlan | 10/10 | 6126 days | 33% |
| Meike Biel | 10/10 | 6134 days | 33% |
| Hendrik | 6/10 | 6176 days | 28% |
| Sabrina | 8/10 | 6176 days | 32% |
| Peter Aston | 5/10 | 6176 days | 25% |
| helga | 9/10 | 6177 days | 33% |
| Janne | 8/10 | 6187 days | 32% |
| Melissa Steedman | 9/10 | 6223 days | 33% |
| gemma1 | 6/10 | 6228 days | 28% |
| Francesco | 8/10 | 6258 days | 32% |
| Jim&Rachel | 9/10 | 6341 days | 33% |
| MarkReid | 10/10 | 6474 days | 33% |
| HalRoberts | 8/10 | 6496 days | 32% |
| David | 9/10 | 6505 days | 33% |
| Justin | 8/10 | 6505 days | 32% |
| Alex | 8/10 | 6512 days | 32% |
| Hilary | 7/10 | 6521 days | 31% |
| Roran | 7/10 | 6531 days | 31% |
| Nina | 10/10 | 6556 days | 33% |
| Inga | 9/10 | 6556 days | 33% |
| Italy | 8/10 | 6556 days | 32% |
| Nina | 8/10 | 6556 days | 32% |
| Helen | 7/10 | 6556 days | 31% |
| JuanPablo | 7/10 | 6573 days | 31% |
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 Waitomo Adventures Ltd experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 49 days. However the Waitomo Adventures Ltd 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 Waitomo Adventures Ltd experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.08% |
| 198 | -4.10% |
| 199 | -4.12% |
| 200 | -4.14% |
| 201 | -4.16% |
| 202 | -4.18% |
| 203 | -4.20% |
| … | … |
Balancing Adjustment
2.08% 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
86%
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.