Kia ora, 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% |
82.87% 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 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
83.59%
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 | 31 days | 100% |
| Dave | 3/10 | 2739 days | 1% |
| Rado Hank | 8/10 | 3068 days | 2% |
| Matthias and Adriane | 9/10 | 3323 days | 2% |
| Laure and Pascal | 9/10 | 3336 days | 2% |
| Thomas Klinting | 10/10 | 3362 days | 2% |
| Helna Saumanova | 9/10 | 3367 days | 2% |
| Danny | 7/10 | 3419 days | 1% |
| Marine Lavie | 8/10 | 3681 days | 1% |
| Cate Ronke | 8/10 | 3684 days | 1% |
| Stephan Friedrich | 9/10 | 3700 days | 1% |
| Stula Vladimir | 10/10 | 3718 days | 1% |
| Isabelle | 10/10 | 3721 days | 1% |
| Mikkel Palleson | 7/10 | 3724 days | 1% |
| Meilin | 5/10 | 3730 days | 1% |
| Sebastian and Susanna | 7/10 | 3769 days | 1% |
| Jakob Gerber | 7/10 | 3774 days | 1% |
| Marie Weber | 9/10 | 4083 days | 0% |
| Erik Hafuer | 4/10 | 4117 days | 0% |
| Caroline Jonsson | 7/10 | 4382 days | 1% |
| Jonny Ronnblom | 7/10 | 4382 days | 1% |
| Catherine Schlachter | 9/10 | 4389 days | 1% |
| Christina Perez | 8/10 | 4389 days | 1% |
| Bea Westkam | 10/10 | 4398 days | 1% |
| Julia Moellers | 8/10 | 4398 days | 1% |
| Anne Haenchen | 8/10 | 4414 days | 1% |
| Kathi | 8/10 | 4414 days | 1% |
| Sophia | 7/10 | 4431 days | 1% |
| Lukas | 6/10 | 4440 days | 1% |
| Celine Darde | 8/10 | 4454 days | 1% |
| Ludovic Denee | 8/10 | 4454 days | 1% |
| Melanie Pretzel | 8/10 | 4781 days | 1% |
| Frederic Birke | 8/10 | 4781 days | 1% |
| Andre and Marina | 2/10 | 4812 days | 0% |
| Hanneke P | 7/10 | 4838 days | 1% |
| Joroen Borkert | 9/10 | 4856 days | 1% |
| Roux | 8/10 | 4859 days | 1% |
| Leo | 9/10 | 4873 days | 1% |
| Lutz Huuemorder | 8/10 | 4875 days | 1% |
| Henzen | 8/10 | 4878 days | 1% |
| Tuedi Muggli | 10/10 | 5141 days | 1% |
| Romla | 8/10 | 5151 days | 1% |
| Ronald Veldman | 8/10 | 5151 days | 1% |
| Richard | 8/10 | 5154 days | 1% |
| Marie Dutron | 6/10 | 5154 days | 1% |
| Carl & Desiree Potter | 9/10 | 5156 days | 1% |
| Frans | 10/10 | 5156 days | 1% |
| Preben vil Helmsen | 10/10 | 5156 days | 1% |
| Johann Maier | 10/10 | 5157 days | 1% |
| Gillian MacLaren | 8/10 | 5158 days | 1% |
| Eline Vakentijn | 8/10 | 5158 days | 1% |
| Langerak | 9/10 | 5160 days | 1% |
| Magda Savels | 8/10 | 5166 days | 1% |
| Roger ter Horst | 9/10 | 5168 days | 1% |
| Maria Dietrich | 9/10 | 5168 days | 1% |
| Samplonius | 8/10 | 5168 days | 1% |
| Manuela Zimmerti | 9/10 | 5236 days | 1% |
| Dirk Faupel | 9/10 | 5239 days | 1% |
| Dirk Faupel | 9/10 | 5239 days | 1% |
| Robert Carswell | 7/10 | 5241 days | 1% |
| Marc & Pauline | 8/10 | 5241 days | 1% |
| Gerard Crothers | 10/10 | 5242 days | 1% |
| Steve Eley | 7/10 | 5244 days | 1% |
| van Rees | 8/10 | 5244 days | 1% |
| Ron & Hannah de Reuver | 9/10 | 5249 days | 1% |
| Wolfgang Goggel | 9/10 | 5249 days | 1% |
| Gary A | 7/10 | 5265 days | 1% |
| Tina | 9/10 | 5265 days | 1% |
| Jon_and_Family | 8/10 | 5479 days | 1% |
| Franzi & Tobi | 9/10 | 5490 days | 1% |
| Oliver Berg | 7/10 | 5493 days | 1% |
| Marianne Wheatley | 10/10 | 5498 days | 1% |
| Krabbe | 8/10 | 5501 days | 1% |
| Rolf | 4/10 | 5501 days | 0% |
| Malcolm Jones | 8/10 | 5503 days | 1% |
| Berger | 8/10 | 5514 days | 1% |
| Pieter | 9/10 | 5515 days | 1% |
| mr Schumader | 9/10 | 5524 days | 1% |
| Tamlin Barton | 6/10 | 5525 days | 1% |
| Tim Van Nispen | 8/10 | 5526 days | 1% |
| Johanna | 6/10 | 5527 days | 1% |
| Eva Stauderova | 10/10 | 5529 days | 1% |
| Patrick Decoster | 9/10 | 5531 days | 1% |
| Liz Dolman | 8/10 | 5533 days | 1% |
| Kay and Colin Yendole | 9/10 | 5534 days | 1% |
| Chamton | 6/10 | 5538 days | 1% |
| willsworthy | 9/10 | 5630 days | 1% |
| allesca | 8/10 | 5661 days | 1% |
| Bergemann | 8/10 | 5861 days | 1% |
| Silke Seemann | 9/10 | 5866 days | 1% |
| John Harrison | 8/10 | 5882 days | 1% |
| Tanja Haring | 9/10 | 5888 days | 1% |
| Amanda Hoff | 10/10 | 5903 days | 1% |
| Beute Jacob | 8/10 | 5916 days | 1% |
| Alies van der plank | 8/10 | 5920 days | 1% |
| mariekef | 10/10 | 5949 days | 1% |
| sanneb1 | 8/10 | 5950 days | 1% |
| keane | 7/10 | 5950 days | 1% |
| mariak | 8/10 | 5951 days | 1% |
| usigmund | 8/10 | 5954 days | 1% |
| hofstetterf | 10/10 | 5963 days | 1% |
| Stefan Lua | 10/10 | 5967 days | 1% |
| Peter Essink | 9/10 | 5967 days | 1% |
| Wolfgang Mages | 10/10 | 5969 days | 1% |
| Ann S | 10/10 | 5973 days | 1% |
| Roeder Grit | 8/10 | 5976 days | 1% |
| ulrichk | 10/10 | 6082 days | 1% |
| gerrys | 7/10 | 6164 days | 1% |
| RolandV | 10/10 | 6193 days | 1% |
| GemmaC | 8/10 | 6198 days | 1% |
| CeesVanW | 8/10 | 6206 days | 1% |
| LaurensD | 7/10 | 6209 days | 1% |
| StefanieA | 10/10 | 6211 days | 1% |
| Hendrik Flier | 7/10 | 6215 days | 1% |
| PBouwmessten | 9/10 | 6229 days | 1% |
| MauzcoV | 9/10 | 6229 days | 1% |
| marcusr | 9/10 | 6250 days | 1% |
| Eugene | 10/10 | 6250 days | 1% |
| Tony | 10/10 | 6257 days | 1% |
| Ian S | 9/10 | 6258 days | 1% |
| Miguel | 9/10 | 6259 days | 1% |
| Thamar | 8/10 | 6273 days | 1% |
| Andie | 10/10 | 6281 days | 1% |
| Miranda | 8/10 | 6285 days | 1% |
| Miha | 10/10 | 6314 days | 1% |
| Gerits | 10/10 | 6321 days | 1% |
| Sluijs | 10/10 | 6326 days | 1% |
| olland | 10/10 | 6329 days | 1% |
| Liz | 10/10 | 6348 days | 1% |
| Stefan | 9/10 | 6373 days | 1% |
| Cory Fusco | 8/10 | 6433 days | 1% |
| Katie Wise | 10/10 | 6441 days | 1% |
| Heckter | 7/10 | 6580 days | 1% |
| Jennifer Baulch | 9/10 | 6585 days | 1% |
| Nancy Dol | 7/10 | 6606 days | 1% |
| David Buckley | 9/10 | 6609 days | 1% |
| Jenny Hulsebosch | 9/10 | 6637 days | 1% |
| Peter | 10/10 | 6678 days | 1% |
| bart | 6/10 | 6683 days | 1% |
| Miriam&Eva | 5/10 | 6899 days | 0% |
| Dennis | 8/10 | 6956 days | 1% |
| Arjan | 7/10 | 6970 days | 1% |
| Meyer | 9/10 | 6972 days | 1% |
| Lucy | 8/10 | 6974 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
-0.02% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 60 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 1 day. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 0 | -0.00% |
| 1 | -0.02% |
| 2 | -0.04% |
| 3 | -0.06% |
| 4 | -0.07% |
| … | … |
Balancing Adjustment
3.04% 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
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.