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
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 | 2632 days | 68% |
| Rado Hank | 8/10 | 2961 days | 100% |
| Matthias and Adriane | 9/10 | 3216 days | 82% |
| Laure and Pascal | 9/10 | 3229 days | 82% |
| Thomas Klinting | 10/10 | 3255 days | 80% |
| Helna Saumanova | 9/10 | 3260 days | 79% |
| Danny | 7/10 | 3312 days | 71% |
| Marine Lavie | 8/10 | 3574 days | 56% |
| Cate Ronke | 8/10 | 3577 days | 56% |
| Stephan Friedrich | 9/10 | 3593 days | 55% |
| Stula Vladimir | 10/10 | 3611 days | 54% |
| Isabelle | 10/10 | 3614 days | 54% |
| Mikkel Palleson | 7/10 | 3617 days | 50% |
| Meilin | 5/10 | 3623 days | 40% |
| Sebastian and Susanna | 7/10 | 3662 days | 47% |
| Jakob Gerber | 7/10 | 3667 days | 46% |
| Marie Weber | 9/10 | 3976 days | 27% |
| Erik Hafuer | 4/10 | 4010 days | 15% |
| Caroline Jonsson | 7/10 | 4275 days | 5% |
| Jonny Ronnblom | 7/10 | 4275 days | 5% |
| Catherine Schlachter | 9/10 | 4282 days | 5% |
| Christina Perez | 8/10 | 4282 days | 5% |
| Bea Westkam | 10/10 | 4291 days | 4% |
| Julia Moellers | 8/10 | 4291 days | 4% |
| Anne Haenchen | 8/10 | 4307 days | 3% |
| Kathi | 8/10 | 4307 days | 3% |
| Sophia | 7/10 | 4324 days | 1% |
| Lukas | 6/10 | 4333 days | 1% |
| Celine Darde | 8/10 | 4347 days | 0% |
| Ludovic Denee | 8/10 | 4347 days | 0% |
| Melanie Pretzel | 8/10 | 4674 days | 34% |
| Frederic Birke | 8/10 | 4674 days | 34% |
| Andre and Marina | 2/10 | 4705 days | 15% |
| Hanneke P | 7/10 | 4731 days | 33% |
| Joroen Borkert | 9/10 | 4749 days | 35% |
| Roux | 8/10 | 4752 days | 34% |
| Leo | 9/10 | 4766 days | 35% |
| Lutz Huuemorder | 8/10 | 4768 days | 34% |
| Henzen | 8/10 | 4771 days | 34% |
| Tuedi Muggli | 10/10 | 5034 days | 35% |
| Romla | 8/10 | 5044 days | 34% |
| Ronald Veldman | 8/10 | 5044 days | 34% |
| Richard | 8/10 | 5047 days | 34% |
| Marie Dutron | 6/10 | 5047 days | 30% |
| Carl & Desiree Potter | 9/10 | 5049 days | 35% |
| Frans | 10/10 | 5049 days | 35% |
| Preben vil Helmsen | 10/10 | 5049 days | 35% |
| Johann Maier | 10/10 | 5050 days | 35% |
| Gillian MacLaren | 8/10 | 5051 days | 34% |
| Eline Vakentijn | 8/10 | 5051 days | 34% |
| Langerak | 9/10 | 5053 days | 35% |
| Magda Savels | 8/10 | 5059 days | 34% |
| Roger ter Horst | 9/10 | 5061 days | 35% |
| Maria Dietrich | 9/10 | 5061 days | 35% |
| Samplonius | 8/10 | 5061 days | 34% |
| Manuela Zimmerti | 9/10 | 5129 days | 35% |
| Dirk Faupel | 9/10 | 5132 days | 35% |
| Dirk Faupel | 9/10 | 5132 days | 35% |
| Robert Carswell | 7/10 | 5134 days | 33% |
| Marc & Pauline | 8/10 | 5134 days | 34% |
| Gerard Crothers | 10/10 | 5135 days | 35% |
| Steve Eley | 7/10 | 5137 days | 33% |
| van Rees | 8/10 | 5137 days | 34% |
| Ron & Hannah de Reuver | 9/10 | 5142 days | 35% |
| Wolfgang Goggel | 9/10 | 5142 days | 35% |
| Gary A | 7/10 | 5158 days | 33% |
| Tina | 9/10 | 5158 days | 35% |
| Jon_and_Family | 8/10 | 5372 days | 34% |
| Franzi & Tobi | 9/10 | 5383 days | 35% |
| Oliver Berg | 7/10 | 5386 days | 33% |
| Marianne Wheatley | 10/10 | 5391 days | 35% |
| Krabbe | 8/10 | 5394 days | 34% |
| Rolf | 4/10 | 5394 days | 22% |
| Malcolm Jones | 8/10 | 5396 days | 34% |
| Berger | 8/10 | 5407 days | 34% |
| Pieter | 9/10 | 5408 days | 35% |
| mr Schumader | 9/10 | 5417 days | 35% |
| Tamlin Barton | 6/10 | 5418 days | 30% |
| Tim Van Nispen | 8/10 | 5419 days | 34% |
| Johanna | 6/10 | 5420 days | 30% |
| Eva Stauderova | 10/10 | 5422 days | 35% |
| Patrick Decoster | 9/10 | 5424 days | 35% |
| Liz Dolman | 8/10 | 5426 days | 34% |
| Kay and Colin Yendole | 9/10 | 5427 days | 35% |
| Chamton | 6/10 | 5431 days | 30% |
| willsworthy | 9/10 | 5523 days | 35% |
| allesca | 8/10 | 5554 days | 34% |
| Bergemann | 8/10 | 5754 days | 34% |
| Silke Seemann | 9/10 | 5759 days | 35% |
| John Harrison | 8/10 | 5775 days | 34% |
| Tanja Haring | 9/10 | 5781 days | 35% |
| Amanda Hoff | 10/10 | 5796 days | 35% |
| Beute Jacob | 8/10 | 5809 days | 34% |
| Alies van der plank | 8/10 | 5813 days | 34% |
| mariekef | 10/10 | 5842 days | 35% |
| sanneb1 | 8/10 | 5843 days | 34% |
| keane | 7/10 | 5843 days | 33% |
| mariak | 8/10 | 5844 days | 34% |
| usigmund | 8/10 | 5847 days | 34% |
| hofstetterf | 10/10 | 5856 days | 35% |
| Stefan Lua | 10/10 | 5860 days | 35% |
| Peter Essink | 9/10 | 5860 days | 35% |
| Wolfgang Mages | 10/10 | 5862 days | 35% |
| Ann S | 10/10 | 5866 days | 35% |
| Roeder Grit | 8/10 | 5869 days | 34% |
| ulrichk | 10/10 | 5975 days | 35% |
| gerrys | 7/10 | 6057 days | 33% |
| RolandV | 10/10 | 6086 days | 35% |
| GemmaC | 8/10 | 6091 days | 34% |
| CeesVanW | 8/10 | 6099 days | 34% |
| LaurensD | 7/10 | 6102 days | 33% |
| StefanieA | 10/10 | 6104 days | 35% |
| Hendrik Flier | 7/10 | 6108 days | 33% |
| PBouwmessten | 9/10 | 6122 days | 35% |
| MauzcoV | 9/10 | 6122 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 | 6207 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 | 6266 days | 35% |
| Cory Fusco | 8/10 | 6326 days | 34% |
| Katie Wise | 10/10 | 6334 days | 35% |
| Heckter | 7/10 | 6473 days | 33% |
| Jennifer Baulch | 9/10 | 6478 days | 35% |
| Nancy Dol | 7/10 | 6499 days | 33% |
| David Buckley | 9/10 | 6502 days | 35% |
| Jenny Hulsebosch | 9/10 | 6530 days | 35% |
| Peter | 10/10 | 6571 days | 35% |
| bart | 6/10 | 6576 days | 30% |
| Miriam&Eva | 5/10 | 6792 days | 26% |
| Dennis | 8/10 | 6849 days | 34% |
| Arjan | 7/10 | 6863 days | 33% |
| Meyer | 9/10 | 6865 days | 35% |
| Lucy | 8/10 | 6867 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.