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 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 | 72 days | 100% |
| Dave | 3/10 | 2780 days | 1% |
| Rado Hank | 8/10 | 3109 days | 2% |
| Matthias and Adriane | 9/10 | 3364 days | 2% |
| Laure and Pascal | 9/10 | 3377 days | 2% |
| Thomas Klinting | 10/10 | 3403 days | 2% |
| Helna Saumanova | 9/10 | 3408 days | 2% |
| Danny | 7/10 | 3460 days | 1% |
| Marine Lavie | 8/10 | 3722 days | 1% |
| Cate Ronke | 8/10 | 3725 days | 1% |
| Stephan Friedrich | 9/10 | 3741 days | 1% |
| Stula Vladimir | 10/10 | 3759 days | 1% |
| Isabelle | 10/10 | 3762 days | 1% |
| Mikkel Palleson | 7/10 | 3765 days | 1% |
| Meilin | 5/10 | 3771 days | 1% |
| Sebastian and Susanna | 7/10 | 3810 days | 1% |
| Jakob Gerber | 7/10 | 3815 days | 1% |
| Marie Weber | 9/10 | 4124 days | 0% |
| Erik Hafuer | 4/10 | 4158 days | 0% |
| Caroline Jonsson | 7/10 | 4423 days | 1% |
| Jonny Ronnblom | 7/10 | 4423 days | 1% |
| Catherine Schlachter | 9/10 | 4430 days | 1% |
| Christina Perez | 8/10 | 4430 days | 1% |
| Bea Westkam | 10/10 | 4439 days | 1% |
| Julia Moellers | 8/10 | 4439 days | 1% |
| Anne Haenchen | 8/10 | 4455 days | 1% |
| Kathi | 8/10 | 4455 days | 1% |
| Sophia | 7/10 | 4472 days | 1% |
| Lukas | 6/10 | 4481 days | 1% |
| Celine Darde | 8/10 | 4495 days | 1% |
| Ludovic Denee | 8/10 | 4495 days | 1% |
| Melanie Pretzel | 8/10 | 4822 days | 1% |
| Frederic Birke | 8/10 | 4822 days | 1% |
| Andre and Marina | 2/10 | 4853 days | 0% |
| Hanneke P | 7/10 | 4879 days | 1% |
| Joroen Borkert | 9/10 | 4897 days | 1% |
| Roux | 8/10 | 4900 days | 1% |
| Leo | 9/10 | 4914 days | 1% |
| Lutz Huuemorder | 8/10 | 4916 days | 1% |
| Henzen | 8/10 | 4919 days | 1% |
| Tuedi Muggli | 10/10 | 5182 days | 1% |
| Romla | 8/10 | 5192 days | 1% |
| Ronald Veldman | 8/10 | 5192 days | 1% |
| Richard | 8/10 | 5195 days | 1% |
| Marie Dutron | 6/10 | 5195 days | 1% |
| Carl & Desiree Potter | 9/10 | 5197 days | 1% |
| Frans | 10/10 | 5197 days | 1% |
| Preben vil Helmsen | 10/10 | 5197 days | 1% |
| Johann Maier | 10/10 | 5198 days | 1% |
| Gillian MacLaren | 8/10 | 5199 days | 1% |
| Eline Vakentijn | 8/10 | 5199 days | 1% |
| Langerak | 9/10 | 5201 days | 1% |
| Magda Savels | 8/10 | 5207 days | 1% |
| Roger ter Horst | 9/10 | 5209 days | 1% |
| Maria Dietrich | 9/10 | 5209 days | 1% |
| Samplonius | 8/10 | 5209 days | 1% |
| Manuela Zimmerti | 9/10 | 5277 days | 1% |
| Dirk Faupel | 9/10 | 5280 days | 1% |
| Dirk Faupel | 9/10 | 5280 days | 1% |
| Robert Carswell | 7/10 | 5282 days | 1% |
| Marc & Pauline | 8/10 | 5282 days | 1% |
| Gerard Crothers | 10/10 | 5283 days | 1% |
| Steve Eley | 7/10 | 5285 days | 1% |
| van Rees | 8/10 | 5285 days | 1% |
| Ron & Hannah de Reuver | 9/10 | 5290 days | 1% |
| Wolfgang Goggel | 9/10 | 5290 days | 1% |
| Gary A | 7/10 | 5306 days | 1% |
| Tina | 9/10 | 5306 days | 1% |
| Jon_and_Family | 8/10 | 5520 days | 1% |
| Franzi & Tobi | 9/10 | 5531 days | 1% |
| Oliver Berg | 7/10 | 5534 days | 1% |
| Marianne Wheatley | 10/10 | 5539 days | 1% |
| Krabbe | 8/10 | 5542 days | 1% |
| Rolf | 4/10 | 5542 days | 0% |
| Malcolm Jones | 8/10 | 5544 days | 1% |
| Berger | 8/10 | 5555 days | 1% |
| Pieter | 9/10 | 5556 days | 1% |
| mr Schumader | 9/10 | 5565 days | 1% |
| Tamlin Barton | 6/10 | 5566 days | 1% |
| Tim Van Nispen | 8/10 | 5567 days | 1% |
| Johanna | 6/10 | 5568 days | 1% |
| Eva Stauderova | 10/10 | 5570 days | 1% |
| Patrick Decoster | 9/10 | 5572 days | 1% |
| Liz Dolman | 8/10 | 5574 days | 1% |
| Kay and Colin Yendole | 9/10 | 5575 days | 1% |
| Chamton | 6/10 | 5579 days | 1% |
| willsworthy | 9/10 | 5671 days | 1% |
| allesca | 8/10 | 5702 days | 1% |
| Bergemann | 8/10 | 5902 days | 1% |
| Silke Seemann | 9/10 | 5907 days | 1% |
| John Harrison | 8/10 | 5923 days | 1% |
| Tanja Haring | 9/10 | 5929 days | 1% |
| Amanda Hoff | 10/10 | 5944 days | 1% |
| Beute Jacob | 8/10 | 5957 days | 1% |
| Alies van der plank | 8/10 | 5961 days | 1% |
| mariekef | 10/10 | 5990 days | 1% |
| sanneb1 | 8/10 | 5991 days | 1% |
| keane | 7/10 | 5991 days | 1% |
| mariak | 8/10 | 5992 days | 1% |
| usigmund | 8/10 | 5995 days | 1% |
| hofstetterf | 10/10 | 6004 days | 1% |
| Stefan Lua | 10/10 | 6008 days | 1% |
| Peter Essink | 9/10 | 6008 days | 1% |
| Wolfgang Mages | 10/10 | 6010 days | 1% |
| Ann S | 10/10 | 6014 days | 1% |
| Roeder Grit | 8/10 | 6017 days | 1% |
| ulrichk | 10/10 | 6123 days | 1% |
| gerrys | 7/10 | 6205 days | 1% |
| RolandV | 10/10 | 6234 days | 1% |
| GemmaC | 8/10 | 6239 days | 1% |
| CeesVanW | 8/10 | 6247 days | 1% |
| LaurensD | 7/10 | 6250 days | 1% |
| StefanieA | 10/10 | 6252 days | 1% |
| Hendrik Flier | 7/10 | 6256 days | 1% |
| PBouwmessten | 9/10 | 6270 days | 1% |
| MauzcoV | 9/10 | 6270 days | 1% |
| marcusr | 9/10 | 6291 days | 1% |
| Eugene | 10/10 | 6291 days | 1% |
| Tony | 10/10 | 6298 days | 1% |
| Ian S | 9/10 | 6299 days | 1% |
| Miguel | 9/10 | 6300 days | 1% |
| Thamar | 8/10 | 6314 days | 1% |
| Andie | 10/10 | 6322 days | 1% |
| Miranda | 8/10 | 6326 days | 1% |
| Miha | 10/10 | 6354 days | 1% |
| Gerits | 10/10 | 6362 days | 1% |
| Sluijs | 10/10 | 6367 days | 1% |
| olland | 10/10 | 6370 days | 1% |
| Liz | 10/10 | 6389 days | 1% |
| Stefan | 9/10 | 6413 days | 1% |
| Cory Fusco | 8/10 | 6474 days | 1% |
| Katie Wise | 10/10 | 6482 days | 1% |
| Heckter | 7/10 | 6621 days | 1% |
| Jennifer Baulch | 9/10 | 6626 days | 1% |
| Nancy Dol | 7/10 | 6647 days | 1% |
| David Buckley | 9/10 | 6650 days | 1% |
| Jenny Hulsebosch | 9/10 | 6678 days | 1% |
| Peter | 10/10 | 6719 days | 1% |
| bart | 6/10 | 6724 days | 1% |
| Miriam&Eva | 5/10 | 6940 days | 0% |
| Dennis | 8/10 | 6997 days | 1% |
| Arjan | 7/10 | 7011 days | 1% |
| Meyer | 9/10 | 7013 days | 1% |
| Lucy | 8/10 | 7015 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
-0.60% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 88 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 42 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 39 | -0.56% |
| 40 | -0.57% |
| 41 | -0.59% |
| 42 | -0.60% |
| 43 | -0.62% |
| 44 | -0.63% |
| 45 | -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.