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
90.38%
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 | 189 days | 100% |
| Dave | 3/10 | 2897 days | 1% |
| Rado Hank | 8/10 | 3226 days | 2% |
| Matthias and Adriane | 9/10 | 3481 days | 2% |
| Laure and Pascal | 9/10 | 3494 days | 2% |
| Thomas Klinting | 10/10 | 3520 days | 2% |
| Helna Saumanova | 9/10 | 3525 days | 2% |
| Danny | 7/10 | 3577 days | 1% |
| Marine Lavie | 8/10 | 3839 days | 1% |
| Cate Ronke | 8/10 | 3842 days | 1% |
| Stephan Friedrich | 9/10 | 3858 days | 1% |
| Stula Vladimir | 10/10 | 3876 days | 1% |
| Isabelle | 10/10 | 3879 days | 1% |
| Mikkel Palleson | 7/10 | 3882 days | 1% |
| Meilin | 5/10 | 3888 days | 1% |
| Sebastian and Susanna | 7/10 | 3927 days | 1% |
| Jakob Gerber | 7/10 | 3932 days | 1% |
| Marie Weber | 9/10 | 4241 days | 0% |
| Erik Hafuer | 4/10 | 4275 days | 0% |
| Caroline Jonsson | 7/10 | 4540 days | 1% |
| Jonny Ronnblom | 7/10 | 4540 days | 1% |
| Catherine Schlachter | 9/10 | 4547 days | 1% |
| Christina Perez | 8/10 | 4547 days | 1% |
| Bea Westkam | 10/10 | 4556 days | 1% |
| Julia Moellers | 8/10 | 4556 days | 1% |
| Anne Haenchen | 8/10 | 4572 days | 1% |
| Kathi | 8/10 | 4572 days | 1% |
| Sophia | 7/10 | 4589 days | 1% |
| Lukas | 6/10 | 4598 days | 1% |
| Celine Darde | 8/10 | 4612 days | 1% |
| Ludovic Denee | 8/10 | 4612 days | 1% |
| Melanie Pretzel | 8/10 | 4939 days | 1% |
| Frederic Birke | 8/10 | 4939 days | 1% |
| Andre and Marina | 2/10 | 4970 days | 0% |
| Hanneke P | 7/10 | 4996 days | 1% |
| Joroen Borkert | 9/10 | 5014 days | 1% |
| Roux | 8/10 | 5017 days | 1% |
| Leo | 9/10 | 5031 days | 1% |
| Lutz Huuemorder | 8/10 | 5033 days | 1% |
| Henzen | 8/10 | 5036 days | 1% |
| Tuedi Muggli | 10/10 | 5299 days | 1% |
| Romla | 8/10 | 5309 days | 1% |
| Ronald Veldman | 8/10 | 5309 days | 1% |
| Richard | 8/10 | 5312 days | 1% |
| Marie Dutron | 6/10 | 5312 days | 1% |
| Carl & Desiree Potter | 9/10 | 5314 days | 1% |
| Frans | 10/10 | 5314 days | 1% |
| Preben vil Helmsen | 10/10 | 5314 days | 1% |
| Johann Maier | 10/10 | 5315 days | 1% |
| Gillian MacLaren | 8/10 | 5316 days | 1% |
| Eline Vakentijn | 8/10 | 5316 days | 1% |
| Langerak | 9/10 | 5318 days | 1% |
| Magda Savels | 8/10 | 5324 days | 1% |
| Roger ter Horst | 9/10 | 5326 days | 1% |
| Maria Dietrich | 9/10 | 5326 days | 1% |
| Samplonius | 8/10 | 5326 days | 1% |
| Manuela Zimmerti | 9/10 | 5394 days | 1% |
| Dirk Faupel | 9/10 | 5397 days | 1% |
| Dirk Faupel | 9/10 | 5397 days | 1% |
| Robert Carswell | 7/10 | 5399 days | 1% |
| Marc & Pauline | 8/10 | 5399 days | 1% |
| Gerard Crothers | 10/10 | 5400 days | 1% |
| Steve Eley | 7/10 | 5402 days | 1% |
| van Rees | 8/10 | 5402 days | 1% |
| Ron & Hannah de Reuver | 9/10 | 5407 days | 1% |
| Wolfgang Goggel | 9/10 | 5407 days | 1% |
| Gary A | 7/10 | 5423 days | 1% |
| Tina | 9/10 | 5423 days | 1% |
| Jon_and_Family | 8/10 | 5637 days | 1% |
| Franzi & Tobi | 9/10 | 5648 days | 1% |
| Oliver Berg | 7/10 | 5651 days | 1% |
| Marianne Wheatley | 10/10 | 5656 days | 1% |
| Krabbe | 8/10 | 5659 days | 1% |
| Rolf | 4/10 | 5659 days | 1% |
| Malcolm Jones | 8/10 | 5661 days | 1% |
| Berger | 8/10 | 5672 days | 1% |
| Pieter | 9/10 | 5673 days | 1% |
| mr Schumader | 9/10 | 5682 days | 1% |
| Tamlin Barton | 6/10 | 5683 days | 1% |
| Tim Van Nispen | 8/10 | 5684 days | 1% |
| Johanna | 6/10 | 5685 days | 1% |
| Eva Stauderova | 10/10 | 5687 days | 1% |
| Patrick Decoster | 9/10 | 5689 days | 1% |
| Liz Dolman | 8/10 | 5691 days | 1% |
| Kay and Colin Yendole | 9/10 | 5692 days | 1% |
| Chamton | 6/10 | 5696 days | 1% |
| willsworthy | 9/10 | 5788 days | 1% |
| allesca | 8/10 | 5819 days | 1% |
| Bergemann | 8/10 | 6019 days | 1% |
| Silke Seemann | 9/10 | 6024 days | 1% |
| John Harrison | 8/10 | 6040 days | 1% |
| Tanja Haring | 9/10 | 6046 days | 1% |
| Amanda Hoff | 10/10 | 6061 days | 1% |
| Beute Jacob | 8/10 | 6074 days | 1% |
| Alies van der plank | 8/10 | 6078 days | 1% |
| mariekef | 10/10 | 6107 days | 1% |
| sanneb1 | 8/10 | 6108 days | 1% |
| keane | 7/10 | 6108 days | 1% |
| mariak | 8/10 | 6109 days | 1% |
| usigmund | 8/10 | 6112 days | 1% |
| hofstetterf | 10/10 | 6121 days | 1% |
| Stefan Lua | 10/10 | 6125 days | 1% |
| Peter Essink | 9/10 | 6125 days | 1% |
| Wolfgang Mages | 10/10 | 6127 days | 1% |
| Ann S | 10/10 | 6131 days | 1% |
| Roeder Grit | 8/10 | 6134 days | 1% |
| ulrichk | 10/10 | 6240 days | 1% |
| gerrys | 7/10 | 6322 days | 1% |
| RolandV | 10/10 | 6351 days | 1% |
| GemmaC | 8/10 | 6356 days | 1% |
| CeesVanW | 8/10 | 6364 days | 1% |
| LaurensD | 7/10 | 6367 days | 1% |
| StefanieA | 10/10 | 6369 days | 1% |
| Hendrik Flier | 7/10 | 6373 days | 1% |
| PBouwmessten | 9/10 | 6387 days | 1% |
| MauzcoV | 9/10 | 6387 days | 1% |
| marcusr | 9/10 | 6408 days | 1% |
| Eugene | 10/10 | 6408 days | 1% |
| Tony | 10/10 | 6415 days | 1% |
| Ian S | 9/10 | 6416 days | 1% |
| Miguel | 9/10 | 6417 days | 1% |
| Thamar | 8/10 | 6431 days | 1% |
| Andie | 10/10 | 6439 days | 1% |
| Miranda | 8/10 | 6443 days | 1% |
| Miha | 10/10 | 6471 days | 1% |
| Gerits | 10/10 | 6479 days | 1% |
| Sluijs | 10/10 | 6484 days | 1% |
| olland | 10/10 | 6487 days | 1% |
| Liz | 10/10 | 6506 days | 1% |
| Stefan | 9/10 | 6530 days | 1% |
| Cory Fusco | 8/10 | 6591 days | 1% |
| Katie Wise | 10/10 | 6599 days | 1% |
| Heckter | 7/10 | 6738 days | 1% |
| Jennifer Baulch | 9/10 | 6743 days | 1% |
| Nancy Dol | 7/10 | 6764 days | 1% |
| David Buckley | 9/10 | 6767 days | 1% |
| Jenny Hulsebosch | 9/10 | 6795 days | 1% |
| Peter | 10/10 | 6836 days | 1% |
| bart | 6/10 | 6841 days | 1% |
| Miriam&Eva | 5/10 | 7057 days | 1% |
| Dennis | 8/10 | 7114 days | 1% |
| Arjan | 7/10 | 7128 days | 1% |
| Meyer | 9/10 | 7130 days | 1% |
| Lucy | 8/10 | 7132 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
-2.16% 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 159 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 156 | -2.12% |
| 157 | -2.13% |
| 158 | -2.15% |
| 159 | -2.16% |
| 160 | -2.18% |
| 161 | -2.19% |
| 162 | -2.20% |
| … | … |
Balancing Adjustment
1.26% 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
90%
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.