G'day, 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 Waimangu Volcanic Valley.
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.
Waimangu Volcanic Valley
Valid Reviews
144 Valid Reviews
The Waimangu Volcanic Valley experience has a total of 144 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 144 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 31 |
|
22% |
| 9/10 | 37 |
|
26% |
| 8/10 | 45 |
|
31% |
| 7/10 | 19 |
|
13% |
| 6/10 | 6 |
|
4% |
| 5/10 | 2 |
|
1% |
| 4/10 | 2 |
|
1% |
| 3/10 | 1 |
|
1% |
| 2/10 | 1 |
|
1% |
| 1/10 | 0 |
|
0% |
82.99% Average
The raw data average (mean) for all the Waimangu Volcanic Valley valid reviews is 82.99% and is based on 144 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
135 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 144 valid reviews, the experience has 135 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 135 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
21% |
| 9/10 | 35 |
|
26% |
| 8/10 | 43 |
|
32% |
| 7/10 | 17 |
|
13% |
| 6/10 | 6 |
|
4% |
| 5/10 | 2 |
|
1% |
| 4/10 | 2 |
|
1% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
1% |
| 1/10 | 0 |
|
0% |
83.26% Average
The raw data average (mean) for all the Waimangu Volcanic Valley face-to-face reviews is 83.26% and is based on 135 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
90.29%
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 |
|---|---|---|---|
| Freya Rose Eld | 10/10 | 73 days | 100% |
| Dave | 3/10 | 2781 days | 1% |
| Rado Hank | 8/10 | 3110 days | 2% |
| Matthias and Adriane | 9/10 | 3365 days | 2% |
| Laure and Pascal | 9/10 | 3378 days | 2% |
| Thomas Klinting | 10/10 | 3404 days | 2% |
| Helna Saumanova | 9/10 | 3409 days | 2% |
| Danny | 7/10 | 3461 days | 1% |
| Marine Lavie | 8/10 | 3723 days | 1% |
| Cate Ronke | 8/10 | 3726 days | 1% |
| Stephan Friedrich | 9/10 | 3742 days | 1% |
| Stula Vladimir | 10/10 | 3760 days | 1% |
| Isabelle | 10/10 | 3763 days | 1% |
| Mikkel Palleson | 7/10 | 3766 days | 1% |
| Meilin | 5/10 | 3772 days | 1% |
| Sebastian and Susanna | 7/10 | 3811 days | 1% |
| Jakob Gerber | 7/10 | 3816 days | 1% |
| Marie Weber | 9/10 | 4125 days | 0% |
| Erik Hafuer | 4/10 | 4159 days | 0% |
| Caroline Jonsson | 7/10 | 4424 days | 1% |
| Jonny Ronnblom | 7/10 | 4424 days | 1% |
| Catherine Schlachter | 9/10 | 4431 days | 1% |
| Christina Perez | 8/10 | 4431 days | 1% |
| Bea Westkam | 10/10 | 4440 days | 1% |
| Julia Moellers | 8/10 | 4440 days | 1% |
| Anne Haenchen | 8/10 | 4456 days | 1% |
| Kathi | 8/10 | 4456 days | 1% |
| Sophia | 7/10 | 4473 days | 1% |
| Lukas | 6/10 | 4482 days | 1% |
| Celine Darde | 8/10 | 4496 days | 1% |
| Ludovic Denee | 8/10 | 4496 days | 1% |
| Melanie Pretzel | 8/10 | 4823 days | 1% |
| Frederic Birke | 8/10 | 4823 days | 1% |
| Andre and Marina | 2/10 | 4854 days | 0% |
| Hanneke P | 7/10 | 4880 days | 1% |
| Joroen Borkert | 9/10 | 4898 days | 1% |
| Roux | 8/10 | 4901 days | 1% |
| Leo | 9/10 | 4915 days | 1% |
| Lutz Huuemorder | 8/10 | 4917 days | 1% |
| Henzen | 8/10 | 4920 days | 1% |
| Tuedi Muggli | 10/10 | 5183 days | 1% |
| Romla | 8/10 | 5193 days | 1% |
| Ronald Veldman | 8/10 | 5193 days | 1% |
| Richard | 8/10 | 5196 days | 1% |
| Marie Dutron | 6/10 | 5196 days | 1% |
| Carl & Desiree Potter | 9/10 | 5198 days | 1% |
| Frans | 10/10 | 5198 days | 1% |
| Preben vil Helmsen | 10/10 | 5198 days | 1% |
| Johann Maier | 10/10 | 5199 days | 1% |
| Gillian MacLaren | 8/10 | 5200 days | 1% |
| Eline Vakentijn | 8/10 | 5200 days | 1% |
| Langerak | 9/10 | 5202 days | 1% |
| Magda Savels | 8/10 | 5208 days | 1% |
| Roger ter Horst | 9/10 | 5210 days | 1% |
| Maria Dietrich | 9/10 | 5210 days | 1% |
| Samplonius | 8/10 | 5210 days | 1% |
| Manuela Zimmerti | 9/10 | 5278 days | 1% |
| Dirk Faupel | 9/10 | 5281 days | 1% |
| Dirk Faupel | 9/10 | 5281 days | 1% |
| Robert Carswell | 7/10 | 5283 days | 1% |
| Marc & Pauline | 8/10 | 5283 days | 1% |
| Gerard Crothers | 10/10 | 5284 days | 1% |
| Steve Eley | 7/10 | 5286 days | 1% |
| van Rees | 8/10 | 5286 days | 1% |
| Ron & Hannah de Reuver | 9/10 | 5291 days | 1% |
| Wolfgang Goggel | 9/10 | 5291 days | 1% |
| Gary A | 7/10 | 5307 days | 1% |
| Tina | 9/10 | 5307 days | 1% |
| Jon_and_Family | 8/10 | 5521 days | 1% |
| Franzi & Tobi | 9/10 | 5532 days | 1% |
| Oliver Berg | 7/10 | 5535 days | 1% |
| Marianne Wheatley | 10/10 | 5540 days | 1% |
| Krabbe | 8/10 | 5543 days | 1% |
| Rolf | 4/10 | 5543 days | 0% |
| Malcolm Jones | 8/10 | 5545 days | 1% |
| Berger | 8/10 | 5556 days | 1% |
| Pieter | 9/10 | 5557 days | 1% |
| mr Schumader | 9/10 | 5566 days | 1% |
| Tamlin Barton | 6/10 | 5567 days | 1% |
| Tim Van Nispen | 8/10 | 5568 days | 1% |
| Johanna | 6/10 | 5569 days | 1% |
| Eva Stauderova | 10/10 | 5571 days | 1% |
| Patrick Decoster | 9/10 | 5573 days | 1% |
| Liz Dolman | 8/10 | 5575 days | 1% |
| Kay and Colin Yendole | 9/10 | 5576 days | 1% |
| Chamton | 6/10 | 5580 days | 1% |
| willsworthy | 9/10 | 5672 days | 1% |
| allesca | 8/10 | 5703 days | 1% |
| Bergemann | 8/10 | 5903 days | 1% |
| Silke Seemann | 9/10 | 5908 days | 1% |
| John Harrison | 8/10 | 5924 days | 1% |
| Tanja Haring | 9/10 | 5930 days | 1% |
| Amanda Hoff | 10/10 | 5945 days | 1% |
| Beute Jacob | 8/10 | 5958 days | 1% |
| Alies van der plank | 8/10 | 5962 days | 1% |
| mariekef | 10/10 | 5991 days | 1% |
| sanneb1 | 8/10 | 5992 days | 1% |
| keane | 7/10 | 5992 days | 1% |
| mariak | 8/10 | 5993 days | 1% |
| usigmund | 8/10 | 5996 days | 1% |
| hofstetterf | 10/10 | 6005 days | 1% |
| Stefan Lua | 10/10 | 6009 days | 1% |
| Peter Essink | 9/10 | 6009 days | 1% |
| Wolfgang Mages | 10/10 | 6011 days | 1% |
| Ann S | 10/10 | 6015 days | 1% |
| Roeder Grit | 8/10 | 6018 days | 1% |
| ulrichk | 10/10 | 6124 days | 1% |
| gerrys | 7/10 | 6206 days | 1% |
| RolandV | 10/10 | 6235 days | 1% |
| GemmaC | 8/10 | 6240 days | 1% |
| CeesVanW | 8/10 | 6248 days | 1% |
| LaurensD | 7/10 | 6251 days | 1% |
| StefanieA | 10/10 | 6253 days | 1% |
| Hendrik Flier | 7/10 | 6257 days | 1% |
| PBouwmessten | 9/10 | 6271 days | 1% |
| MauzcoV | 9/10 | 6271 days | 1% |
| marcusr | 9/10 | 6292 days | 1% |
| Eugene | 10/10 | 6292 days | 1% |
| Tony | 10/10 | 6299 days | 1% |
| Ian S | 9/10 | 6300 days | 1% |
| Miguel | 9/10 | 6301 days | 1% |
| Thamar | 8/10 | 6315 days | 1% |
| Andie | 10/10 | 6323 days | 1% |
| Miranda | 8/10 | 6327 days | 1% |
| Miha | 10/10 | 6355 days | 1% |
| Gerits | 10/10 | 6363 days | 1% |
| Sluijs | 10/10 | 6368 days | 1% |
| olland | 10/10 | 6371 days | 1% |
| Liz | 10/10 | 6390 days | 1% |
| Stefan | 9/10 | 6415 days | 1% |
| Cory Fusco | 8/10 | 6475 days | 1% |
| Katie Wise | 10/10 | 6483 days | 1% |
| Heckter | 7/10 | 6622 days | 1% |
| Jennifer Baulch | 9/10 | 6627 days | 1% |
| Nancy Dol | 7/10 | 6648 days | 1% |
| David Buckley | 9/10 | 6651 days | 1% |
| Jenny Hulsebosch | 9/10 | 6679 days | 1% |
| Peter | 10/10 | 6720 days | 1% |
| bart | 6/10 | 6725 days | 1% |
| Miriam&Eva | 5/10 | 6941 days | 0% |
| Dennis | 8/10 | 6998 days | 1% |
| Arjan | 7/10 | 7012 days | 1% |
| Meyer | 9/10 | 7014 days | 1% |
| Lucy | 8/10 | 7016 days | 1% |
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 Waimangu Volcanic Valley experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-0.61% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 89 days. However the Waimangu Volcanic Valley 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 Waimangu Volcanic Valley experience has been adjusted for 43 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 40 | -0.57% |
| 41 | -0.58% |
| 42 | -0.60% |
| 43 | -0.61% |
| 44 | -0.63% |
| 45 | -0.64% |
| 46 | -0.65% |
| … | … |
Balancing Adjustment
1.04% 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
91%
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.