Hey, 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
143 Valid Reviews
The Waimangu Volcanic Valley experience has a total of 143 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 143 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 30 |
|
21% |
| 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% |
82.87% Average
The raw data average (mean) for all the Waimangu Volcanic Valley valid reviews is 82.87% and is based on 143 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 143 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
83.85%
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 |
|---|---|---|---|
| Dave | 3/10 | 2636 days | 68% |
| Rado Hank | 8/10 | 2965 days | 100% |
| Matthias and Adriane | 9/10 | 3220 days | 82% |
| Laure and Pascal | 9/10 | 3233 days | 81% |
| Thomas Klinting | 10/10 | 3259 days | 80% |
| Helna Saumanova | 9/10 | 3264 days | 79% |
| Danny | 7/10 | 3316 days | 71% |
| Marine Lavie | 8/10 | 3578 days | 56% |
| Cate Ronke | 8/10 | 3581 days | 56% |
| Stephan Friedrich | 9/10 | 3597 days | 55% |
| Stula Vladimir | 10/10 | 3615 days | 54% |
| Isabelle | 10/10 | 3618 days | 54% |
| Mikkel Palleson | 7/10 | 3621 days | 50% |
| Meilin | 5/10 | 3627 days | 40% |
| Sebastian and Susanna | 7/10 | 3666 days | 47% |
| Jakob Gerber | 7/10 | 3671 days | 46% |
| Marie Weber | 9/10 | 3980 days | 27% |
| Erik Hafuer | 4/10 | 4014 days | 16% |
| Caroline Jonsson | 7/10 | 4279 days | 5% |
| Jonny Ronnblom | 7/10 | 4279 days | 5% |
| Catherine Schlachter | 9/10 | 4286 days | 5% |
| Christina Perez | 8/10 | 4286 days | 5% |
| Bea Westkam | 10/10 | 4295 days | 4% |
| Julia Moellers | 8/10 | 4295 days | 4% |
| Anne Haenchen | 8/10 | 4311 days | 3% |
| Kathi | 8/10 | 4311 days | 3% |
| Sophia | 7/10 | 4328 days | 1% |
| Lukas | 6/10 | 4337 days | 1% |
| Celine Darde | 8/10 | 4351 days | 0% |
| Ludovic Denee | 8/10 | 4351 days | 0% |
| Melanie Pretzel | 8/10 | 4678 days | 35% |
| Frederic Birke | 8/10 | 4678 days | 35% |
| Andre and Marina | 2/10 | 4709 days | 15% |
| Hanneke P | 7/10 | 4735 days | 33% |
| Joroen Borkert | 9/10 | 4753 days | 35% |
| Roux | 8/10 | 4756 days | 35% |
| Leo | 9/10 | 4770 days | 35% |
| Lutz Huuemorder | 8/10 | 4772 days | 35% |
| Henzen | 8/10 | 4775 days | 35% |
| Tuedi Muggli | 10/10 | 5038 days | 36% |
| Romla | 8/10 | 5048 days | 35% |
| Ronald Veldman | 8/10 | 5048 days | 35% |
| Richard | 8/10 | 5051 days | 35% |
| Marie Dutron | 6/10 | 5051 days | 30% |
| Carl & Desiree Potter | 9/10 | 5053 days | 35% |
| Frans | 10/10 | 5053 days | 36% |
| Preben vil Helmsen | 10/10 | 5053 days | 36% |
| Johann Maier | 10/10 | 5054 days | 36% |
| Gillian MacLaren | 8/10 | 5055 days | 35% |
| Eline Vakentijn | 8/10 | 5055 days | 35% |
| Langerak | 9/10 | 5057 days | 35% |
| Magda Savels | 8/10 | 5063 days | 35% |
| Roger ter Horst | 9/10 | 5065 days | 35% |
| Maria Dietrich | 9/10 | 5065 days | 35% |
| Samplonius | 8/10 | 5065 days | 35% |
| Manuela Zimmerti | 9/10 | 5133 days | 35% |
| Dirk Faupel | 9/10 | 5136 days | 35% |
| Dirk Faupel | 9/10 | 5136 days | 35% |
| Robert Carswell | 7/10 | 5138 days | 33% |
| Marc & Pauline | 8/10 | 5138 days | 35% |
| Gerard Crothers | 10/10 | 5139 days | 36% |
| Steve Eley | 7/10 | 5141 days | 33% |
| van Rees | 8/10 | 5141 days | 35% |
| Ron & Hannah de Reuver | 9/10 | 5146 days | 35% |
| Wolfgang Goggel | 9/10 | 5146 days | 35% |
| Gary A | 7/10 | 5162 days | 33% |
| Tina | 9/10 | 5162 days | 35% |
| Jon_and_Family | 8/10 | 5376 days | 35% |
| Franzi & Tobi | 9/10 | 5387 days | 35% |
| Oliver Berg | 7/10 | 5390 days | 33% |
| Marianne Wheatley | 10/10 | 5395 days | 36% |
| Krabbe | 8/10 | 5398 days | 35% |
| Rolf | 4/10 | 5398 days | 22% |
| Malcolm Jones | 8/10 | 5400 days | 35% |
| Berger | 8/10 | 5411 days | 35% |
| Pieter | 9/10 | 5412 days | 35% |
| mr Schumader | 9/10 | 5421 days | 35% |
| Tamlin Barton | 6/10 | 5422 days | 30% |
| Tim Van Nispen | 8/10 | 5423 days | 35% |
| Johanna | 6/10 | 5424 days | 30% |
| Eva Stauderova | 10/10 | 5426 days | 36% |
| Patrick Decoster | 9/10 | 5428 days | 35% |
| Liz Dolman | 8/10 | 5430 days | 35% |
| Kay and Colin Yendole | 9/10 | 5431 days | 35% |
| Chamton | 6/10 | 5435 days | 30% |
| willsworthy | 9/10 | 5527 days | 35% |
| allesca | 8/10 | 5558 days | 35% |
| Bergemann | 8/10 | 5758 days | 35% |
| Silke Seemann | 9/10 | 5763 days | 35% |
| John Harrison | 8/10 | 5779 days | 35% |
| Tanja Haring | 9/10 | 5785 days | 35% |
| Amanda Hoff | 10/10 | 5800 days | 36% |
| Beute Jacob | 8/10 | 5813 days | 35% |
| Alies van der plank | 8/10 | 5817 days | 35% |
| mariekef | 10/10 | 5846 days | 36% |
| sanneb1 | 8/10 | 5847 days | 35% |
| keane | 7/10 | 5847 days | 33% |
| mariak | 8/10 | 5848 days | 35% |
| usigmund | 8/10 | 5851 days | 35% |
| hofstetterf | 10/10 | 5860 days | 36% |
| Stefan Lua | 10/10 | 5864 days | 36% |
| Peter Essink | 9/10 | 5864 days | 35% |
| Wolfgang Mages | 10/10 | 5866 days | 36% |
| Ann S | 10/10 | 5870 days | 36% |
| Roeder Grit | 8/10 | 5873 days | 35% |
| ulrichk | 10/10 | 5979 days | 36% |
| gerrys | 7/10 | 6061 days | 33% |
| RolandV | 10/10 | 6090 days | 36% |
| GemmaC | 8/10 | 6095 days | 35% |
| CeesVanW | 8/10 | 6103 days | 35% |
| LaurensD | 7/10 | 6106 days | 33% |
| StefanieA | 10/10 | 6108 days | 36% |
| Hendrik Flier | 7/10 | 6112 days | 33% |
| PBouwmessten | 9/10 | 6126 days | 35% |
| MauzcoV | 9/10 | 6126 days | 35% |
| marcusr | 9/10 | 6148 days | 35% |
| Eugene | 10/10 | 6148 days | 36% |
| Tony | 10/10 | 6155 days | 36% |
| Ian S | 9/10 | 6156 days | 35% |
| Miguel | 9/10 | 6157 days | 35% |
| Thamar | 8/10 | 6171 days | 35% |
| Andie | 10/10 | 6179 days | 36% |
| Miranda | 8/10 | 6183 days | 35% |
| Miha | 10/10 | 6211 days | 36% |
| Gerits | 10/10 | 6219 days | 36% |
| Sluijs | 10/10 | 6224 days | 36% |
| olland | 10/10 | 6227 days | 36% |
| Liz | 10/10 | 6246 days | 36% |
| Stefan | 9/10 | 6270 days | 35% |
| Cory Fusco | 8/10 | 6331 days | 35% |
| Katie Wise | 10/10 | 6339 days | 36% |
| Heckter | 7/10 | 6477 days | 33% |
| Jennifer Baulch | 9/10 | 6482 days | 35% |
| Nancy Dol | 7/10 | 6503 days | 33% |
| David Buckley | 9/10 | 6506 days | 35% |
| Jenny Hulsebosch | 9/10 | 6534 days | 35% |
| Peter | 10/10 | 6575 days | 36% |
| bart | 6/10 | 6580 days | 30% |
| Miriam&Eva | 5/10 | 6796 days | 27% |
| Dennis | 8/10 | 6853 days | 35% |
| Arjan | 7/10 | 6867 days | 33% |
| Meyer | 9/10 | 6869 days | 35% |
| Lucy | 8/10 | 6871 days | 35% |
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
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 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 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.98% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
3.05% 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
83%
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.