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
83.45%
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 | 2221 days | 65% |
| Rado Hank | 8/10 | 2550 days | 100% |
| Matthias and Adriane | 9/10 | 2805 days | 87% |
| Laure and Pascal | 9/10 | 2818 days | 86% |
| Thomas Klinting | 10/10 | 2844 days | 85% |
| Helna Saumanova | 9/10 | 2849 days | 84% |
| Danny | 7/10 | 2901 days | 76% |
| Marine Lavie | 8/10 | 3163 days | 66% |
| Cate Ronke | 8/10 | 3166 days | 66% |
| Stephan Friedrich | 9/10 | 3182 days | 66% |
| Stula Vladimir | 10/10 | 3200 days | 65% |
| Isabelle | 10/10 | 3203 days | 65% |
| Mikkel Palleson | 7/10 | 3206 days | 60% |
| Meilin | 5/10 | 3212 days | 49% |
| Sebastian and Susanna | 7/10 | 3251 days | 58% |
| Jakob Gerber | 7/10 | 3256 days | 58% |
| Marie Weber | 9/10 | 3565 days | 44% |
| Erik Hafuer | 4/10 | 3599 days | 28% |
| Caroline Jonsson | 7/10 | 3864 days | 26% |
| Jonny Ronnblom | 7/10 | 3864 days | 26% |
| Catherine Schlachter | 9/10 | 3871 days | 27% |
| Christina Perez | 8/10 | 3871 days | 27% |
| Bea Westkam | 10/10 | 3880 days | 27% |
| Julia Moellers | 8/10 | 3880 days | 27% |
| Anne Haenchen | 8/10 | 3896 days | 26% |
| Kathi | 8/10 | 3896 days | 26% |
| Sophia | 7/10 | 3913 days | 23% |
| Lukas | 6/10 | 3922 days | 21% |
| Celine Darde | 8/10 | 3936 days | 23% |
| Ludovic Denee | 8/10 | 3936 days | 23% |
| Melanie Pretzel | 8/10 | 4263 days | 5% |
| Frederic Birke | 8/10 | 4263 days | 5% |
| Andre and Marina | 2/10 | 4294 days | 1% |
| Hanneke P | 7/10 | 4320 days | 2% |
| Joroen Borkert | 9/10 | 4338 days | 1% |
| Roux | 8/10 | 4341 days | 1% |
| Leo | 9/10 | 4355 days | 0% |
| Lutz Huuemorder | 8/10 | 4357 days | 0% |
| Henzen | 8/10 | 4360 days | 0% |
| Tuedi Muggli | 10/10 | 4623 days | 28% |
| Romla | 8/10 | 4633 days | 27% |
| Ronald Veldman | 8/10 | 4633 days | 27% |
| Richard | 8/10 | 4636 days | 27% |
| Marie Dutron | 6/10 | 4636 days | 24% |
| Carl & Desiree Potter | 9/10 | 4638 days | 27% |
| Frans | 10/10 | 4638 days | 28% |
| Preben vil Helmsen | 10/10 | 4638 days | 28% |
| Johann Maier | 10/10 | 4639 days | 28% |
| Gillian MacLaren | 8/10 | 4640 days | 27% |
| Eline Vakentijn | 8/10 | 4640 days | 27% |
| Langerak | 9/10 | 4642 days | 27% |
| Magda Savels | 8/10 | 4648 days | 27% |
| Roger ter Horst | 9/10 | 4650 days | 27% |
| Maria Dietrich | 9/10 | 4650 days | 27% |
| Samplonius | 8/10 | 4650 days | 27% |
| Manuela Zimmerti | 9/10 | 4718 days | 27% |
| Dirk Faupel | 9/10 | 4721 days | 27% |
| Dirk Faupel | 9/10 | 4721 days | 27% |
| Robert Carswell | 7/10 | 4723 days | 26% |
| Marc & Pauline | 8/10 | 4723 days | 27% |
| Gerard Crothers | 10/10 | 4724 days | 28% |
| Steve Eley | 7/10 | 4726 days | 26% |
| van Rees | 8/10 | 4726 days | 27% |
| Ron & Hannah de Reuver | 9/10 | 4731 days | 27% |
| Wolfgang Goggel | 9/10 | 4731 days | 27% |
| Gary A | 7/10 | 4747 days | 26% |
| Tina | 9/10 | 4747 days | 27% |
| Jon_and_Family | 8/10 | 4961 days | 27% |
| Franzi & Tobi | 9/10 | 4972 days | 27% |
| Oliver Berg | 7/10 | 4975 days | 26% |
| Marianne Wheatley | 10/10 | 4980 days | 28% |
| Krabbe | 8/10 | 4983 days | 27% |
| Rolf | 4/10 | 4983 days | 18% |
| Malcolm Jones | 8/10 | 4985 days | 27% |
| Berger | 8/10 | 4996 days | 27% |
| Pieter | 9/10 | 4997 days | 27% |
| mr Schumader | 9/10 | 5006 days | 27% |
| Tamlin Barton | 6/10 | 5007 days | 24% |
| Tim Van Nispen | 8/10 | 5008 days | 27% |
| Johanna | 6/10 | 5009 days | 24% |
| Eva Stauderova | 10/10 | 5011 days | 28% |
| Patrick Decoster | 9/10 | 5013 days | 27% |
| Liz Dolman | 8/10 | 5015 days | 27% |
| Kay and Colin Yendole | 9/10 | 5016 days | 27% |
| Chamton | 6/10 | 5020 days | 24% |
| willsworthy | 9/10 | 5112 days | 27% |
| allesca | 8/10 | 5143 days | 27% |
| Bergemann | 8/10 | 5343 days | 27% |
| Silke Seemann | 9/10 | 5348 days | 27% |
| John Harrison | 8/10 | 5364 days | 27% |
| Tanja Haring | 9/10 | 5370 days | 27% |
| Amanda Hoff | 10/10 | 5385 days | 28% |
| Beute Jacob | 8/10 | 5398 days | 27% |
| Alies van der plank | 8/10 | 5402 days | 27% |
| mariekef | 10/10 | 5431 days | 28% |
| sanneb1 | 8/10 | 5432 days | 27% |
| keane | 7/10 | 5432 days | 26% |
| mariak | 8/10 | 5433 days | 27% |
| usigmund | 8/10 | 5436 days | 27% |
| hofstetterf | 10/10 | 5445 days | 28% |
| Stefan Lua | 10/10 | 5449 days | 28% |
| Peter Essink | 9/10 | 5449 days | 27% |
| Wolfgang Mages | 10/10 | 5451 days | 28% |
| Ann S | 10/10 | 5455 days | 28% |
| Roeder Grit | 8/10 | 5458 days | 27% |
| ulrichk | 10/10 | 5564 days | 28% |
| gerrys | 7/10 | 5646 days | 26% |
| RolandV | 10/10 | 5675 days | 28% |
| GemmaC | 8/10 | 5680 days | 27% |
| CeesVanW | 8/10 | 5688 days | 27% |
| LaurensD | 7/10 | 5691 days | 26% |
| StefanieA | 10/10 | 5693 days | 28% |
| Hendrik Flier | 7/10 | 5697 days | 26% |
| PBouwmessten | 9/10 | 5711 days | 27% |
| MauzcoV | 9/10 | 5711 days | 27% |
| marcusr | 9/10 | 5733 days | 27% |
| Eugene | 10/10 | 5733 days | 28% |
| Tony | 10/10 | 5740 days | 28% |
| Ian S | 9/10 | 5741 days | 27% |
| Miguel | 9/10 | 5742 days | 27% |
| Thamar | 8/10 | 5756 days | 27% |
| Andie | 10/10 | 5764 days | 28% |
| Miranda | 8/10 | 5768 days | 27% |
| Miha | 10/10 | 5796 days | 28% |
| Gerits | 10/10 | 5804 days | 28% |
| Sluijs | 10/10 | 5809 days | 28% |
| olland | 10/10 | 5812 days | 28% |
| Liz | 10/10 | 5831 days | 28% |
| Stefan | 9/10 | 5855 days | 27% |
| Cory Fusco | 8/10 | 5916 days | 27% |
| Katie Wise | 10/10 | 5924 days | 28% |
| Heckter | 7/10 | 6062 days | 26% |
| Jennifer Baulch | 9/10 | 6067 days | 27% |
| Nancy Dol | 7/10 | 6088 days | 26% |
| David Buckley | 9/10 | 6091 days | 27% |
| Jenny Hulsebosch | 9/10 | 6119 days | 27% |
| Peter | 10/10 | 6160 days | 28% |
| bart | 6/10 | 6165 days | 24% |
| Miriam&Eva | 5/10 | 6381 days | 21% |
| Dennis | 8/10 | 6438 days | 27% |
| Arjan | 7/10 | 6452 days | 26% |
| Meyer | 9/10 | 6454 days | 27% |
| Lucy | 8/10 | 6456 days | 27% |
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
-3.84% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 51 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 | -3.78% |
| 198 | -3.80% |
| 199 | -3.82% |
| 200 | -3.84% |
| 201 | -3.86% |
| 202 | -3.88% |
| 203 | -3.90% |
| … | … |
Balancing Adjustment
3.11% 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.