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
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 | 2631 days | 68% |
| Rado Hank | 8/10 | 2960 days | 100% |
| Matthias and Adriane | 9/10 | 3215 days | 82% |
| Laure and Pascal | 9/10 | 3228 days | 82% |
| Thomas Klinting | 10/10 | 3254 days | 80% |
| Helna Saumanova | 9/10 | 3259 days | 79% |
| Danny | 7/10 | 3311 days | 71% |
| Marine Lavie | 8/10 | 3573 days | 56% |
| Cate Ronke | 8/10 | 3576 days | 56% |
| Stephan Friedrich | 9/10 | 3592 days | 55% |
| Stula Vladimir | 10/10 | 3610 days | 54% |
| Isabelle | 10/10 | 3613 days | 54% |
| Mikkel Palleson | 7/10 | 3616 days | 50% |
| Meilin | 5/10 | 3622 days | 40% |
| Sebastian and Susanna | 7/10 | 3661 days | 47% |
| Jakob Gerber | 7/10 | 3666 days | 46% |
| Marie Weber | 9/10 | 3975 days | 27% |
| Erik Hafuer | 4/10 | 4009 days | 15% |
| Caroline Jonsson | 7/10 | 4274 days | 5% |
| Jonny Ronnblom | 7/10 | 4274 days | 5% |
| Catherine Schlachter | 9/10 | 4281 days | 5% |
| Christina Perez | 8/10 | 4281 days | 5% |
| Bea Westkam | 10/10 | 4290 days | 4% |
| Julia Moellers | 8/10 | 4290 days | 4% |
| Anne Haenchen | 8/10 | 4306 days | 3% |
| Kathi | 8/10 | 4306 days | 3% |
| Sophia | 7/10 | 4323 days | 1% |
| Lukas | 6/10 | 4332 days | 1% |
| Celine Darde | 8/10 | 4346 days | 0% |
| Ludovic Denee | 8/10 | 4346 days | 0% |
| Melanie Pretzel | 8/10 | 4673 days | 34% |
| Frederic Birke | 8/10 | 4673 days | 34% |
| Andre and Marina | 2/10 | 4704 days | 15% |
| Hanneke P | 7/10 | 4730 days | 33% |
| Joroen Borkert | 9/10 | 4748 days | 35% |
| Roux | 8/10 | 4751 days | 34% |
| Leo | 9/10 | 4765 days | 35% |
| Lutz Huuemorder | 8/10 | 4767 days | 34% |
| Henzen | 8/10 | 4770 days | 34% |
| Tuedi Muggli | 10/10 | 5033 days | 35% |
| Romla | 8/10 | 5043 days | 34% |
| Ronald Veldman | 8/10 | 5043 days | 34% |
| Richard | 8/10 | 5046 days | 34% |
| Marie Dutron | 6/10 | 5046 days | 30% |
| Carl & Desiree Potter | 9/10 | 5048 days | 35% |
| Frans | 10/10 | 5048 days | 35% |
| Preben vil Helmsen | 10/10 | 5048 days | 35% |
| Johann Maier | 10/10 | 5049 days | 35% |
| Gillian MacLaren | 8/10 | 5050 days | 34% |
| Eline Vakentijn | 8/10 | 5050 days | 34% |
| Langerak | 9/10 | 5052 days | 35% |
| Magda Savels | 8/10 | 5058 days | 34% |
| Roger ter Horst | 9/10 | 5060 days | 35% |
| Maria Dietrich | 9/10 | 5060 days | 35% |
| Samplonius | 8/10 | 5060 days | 34% |
| Manuela Zimmerti | 9/10 | 5128 days | 35% |
| Dirk Faupel | 9/10 | 5131 days | 35% |
| Dirk Faupel | 9/10 | 5131 days | 35% |
| Robert Carswell | 7/10 | 5133 days | 33% |
| Marc & Pauline | 8/10 | 5133 days | 34% |
| Gerard Crothers | 10/10 | 5134 days | 35% |
| Steve Eley | 7/10 | 5136 days | 33% |
| van Rees | 8/10 | 5136 days | 34% |
| Ron & Hannah de Reuver | 9/10 | 5141 days | 35% |
| Wolfgang Goggel | 9/10 | 5141 days | 35% |
| Gary A | 7/10 | 5157 days | 33% |
| Tina | 9/10 | 5157 days | 35% |
| Jon_and_Family | 8/10 | 5371 days | 34% |
| Franzi & Tobi | 9/10 | 5382 days | 35% |
| Oliver Berg | 7/10 | 5385 days | 33% |
| Marianne Wheatley | 10/10 | 5390 days | 35% |
| Krabbe | 8/10 | 5393 days | 34% |
| Rolf | 4/10 | 5393 days | 22% |
| Malcolm Jones | 8/10 | 5395 days | 34% |
| Berger | 8/10 | 5406 days | 34% |
| Pieter | 9/10 | 5407 days | 35% |
| mr Schumader | 9/10 | 5416 days | 35% |
| Tamlin Barton | 6/10 | 5417 days | 30% |
| Tim Van Nispen | 8/10 | 5418 days | 34% |
| Johanna | 6/10 | 5419 days | 30% |
| Eva Stauderova | 10/10 | 5421 days | 35% |
| Patrick Decoster | 9/10 | 5423 days | 35% |
| Liz Dolman | 8/10 | 5425 days | 34% |
| Kay and Colin Yendole | 9/10 | 5426 days | 35% |
| Chamton | 6/10 | 5430 days | 30% |
| willsworthy | 9/10 | 5522 days | 35% |
| allesca | 8/10 | 5553 days | 34% |
| Bergemann | 8/10 | 5753 days | 34% |
| Silke Seemann | 9/10 | 5758 days | 35% |
| John Harrison | 8/10 | 5774 days | 34% |
| Tanja Haring | 9/10 | 5780 days | 35% |
| Amanda Hoff | 10/10 | 5795 days | 35% |
| Beute Jacob | 8/10 | 5808 days | 34% |
| Alies van der plank | 8/10 | 5812 days | 34% |
| mariekef | 10/10 | 5841 days | 35% |
| sanneb1 | 8/10 | 5842 days | 34% |
| keane | 7/10 | 5842 days | 33% |
| mariak | 8/10 | 5843 days | 34% |
| usigmund | 8/10 | 5846 days | 34% |
| hofstetterf | 10/10 | 5855 days | 35% |
| Stefan Lua | 10/10 | 5859 days | 35% |
| Peter Essink | 9/10 | 5859 days | 35% |
| Wolfgang Mages | 10/10 | 5861 days | 35% |
| Ann S | 10/10 | 5865 days | 35% |
| Roeder Grit | 8/10 | 5868 days | 34% |
| ulrichk | 10/10 | 5974 days | 35% |
| gerrys | 7/10 | 6056 days | 33% |
| RolandV | 10/10 | 6085 days | 35% |
| GemmaC | 8/10 | 6090 days | 34% |
| CeesVanW | 8/10 | 6098 days | 34% |
| LaurensD | 7/10 | 6101 days | 33% |
| StefanieA | 10/10 | 6103 days | 35% |
| Hendrik Flier | 7/10 | 6107 days | 33% |
| PBouwmessten | 9/10 | 6121 days | 35% |
| MauzcoV | 9/10 | 6121 days | 35% |
| marcusr | 9/10 | 6143 days | 35% |
| Eugene | 10/10 | 6143 days | 35% |
| Tony | 10/10 | 6150 days | 35% |
| Ian S | 9/10 | 6151 days | 35% |
| Miguel | 9/10 | 6152 days | 35% |
| Thamar | 8/10 | 6166 days | 34% |
| Andie | 10/10 | 6174 days | 35% |
| Miranda | 8/10 | 6178 days | 34% |
| Miha | 10/10 | 6206 days | 35% |
| Gerits | 10/10 | 6214 days | 35% |
| Sluijs | 10/10 | 6219 days | 35% |
| olland | 10/10 | 6222 days | 35% |
| Liz | 10/10 | 6241 days | 35% |
| Stefan | 9/10 | 6265 days | 35% |
| Cory Fusco | 8/10 | 6326 days | 34% |
| Katie Wise | 10/10 | 6334 days | 35% |
| Heckter | 7/10 | 6472 days | 33% |
| Jennifer Baulch | 9/10 | 6477 days | 35% |
| Nancy Dol | 7/10 | 6498 days | 33% |
| David Buckley | 9/10 | 6501 days | 35% |
| Jenny Hulsebosch | 9/10 | 6529 days | 35% |
| Peter | 10/10 | 6570 days | 35% |
| bart | 6/10 | 6575 days | 30% |
| Miriam&Eva | 5/10 | 6791 days | 26% |
| Dennis | 8/10 | 6848 days | 34% |
| Arjan | 7/10 | 6862 days | 33% |
| Meyer | 9/10 | 6864 days | 35% |
| Lucy | 8/10 | 6866 days | 34% |
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
-4.06% 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 | -4.00% |
| 198 | -4.02% |
| 199 | -4.04% |
| 200 | -4.06% |
| 201 | -4.08% |
| 202 | -4.10% |
| 203 | -4.12% |
| … | … |
Balancing Adjustment
3.06% 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.