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
83.89%
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 | 2658 days | 69% |
| Rado Hank | 8/10 | 2987 days | 100% |
| Matthias and Adriane | 9/10 | 3242 days | 82% |
| Laure and Pascal | 9/10 | 3255 days | 81% |
| Thomas Klinting | 10/10 | 3281 days | 80% |
| Helna Saumanova | 9/10 | 3286 days | 79% |
| Danny | 7/10 | 3338 days | 71% |
| Marine Lavie | 8/10 | 3600 days | 56% |
| Cate Ronke | 8/10 | 3603 days | 56% |
| Stephan Friedrich | 9/10 | 3619 days | 55% |
| Stula Vladimir | 10/10 | 3637 days | 54% |
| Isabelle | 10/10 | 3640 days | 54% |
| Mikkel Palleson | 7/10 | 3643 days | 50% |
| Meilin | 5/10 | 3649 days | 41% |
| Sebastian and Susanna | 7/10 | 3688 days | 47% |
| Jakob Gerber | 7/10 | 3693 days | 47% |
| Marie Weber | 9/10 | 4002 days | 27% |
| Erik Hafuer | 4/10 | 4036 days | 16% |
| Caroline Jonsson | 7/10 | 4301 days | 5% |
| Jonny Ronnblom | 7/10 | 4301 days | 5% |
| Catherine Schlachter | 9/10 | 4308 days | 5% |
| Christina Perez | 8/10 | 4308 days | 5% |
| Bea Westkam | 10/10 | 4317 days | 4% |
| Julia Moellers | 8/10 | 4317 days | 4% |
| Anne Haenchen | 8/10 | 4333 days | 3% |
| Kathi | 8/10 | 4333 days | 3% |
| Sophia | 7/10 | 4350 days | 2% |
| Lukas | 6/10 | 4359 days | 1% |
| Celine Darde | 8/10 | 4373 days | 0% |
| Ludovic Denee | 8/10 | 4373 days | 0% |
| Melanie Pretzel | 8/10 | 4700 days | 36% |
| Frederic Birke | 8/10 | 4700 days | 36% |
| Andre and Marina | 2/10 | 4731 days | 17% |
| Hanneke P | 7/10 | 4757 days | 35% |
| Joroen Borkert | 9/10 | 4775 days | 37% |
| Roux | 8/10 | 4778 days | 36% |
| Leo | 9/10 | 4792 days | 37% |
| Lutz Huuemorder | 8/10 | 4794 days | 36% |
| Henzen | 8/10 | 4797 days | 36% |
| Tuedi Muggli | 10/10 | 5060 days | 37% |
| Romla | 8/10 | 5070 days | 36% |
| Ronald Veldman | 8/10 | 5070 days | 36% |
| Richard | 8/10 | 5073 days | 36% |
| Marie Dutron | 6/10 | 5073 days | 32% |
| Carl & Desiree Potter | 9/10 | 5075 days | 37% |
| Frans | 10/10 | 5075 days | 37% |
| Preben vil Helmsen | 10/10 | 5075 days | 37% |
| Johann Maier | 10/10 | 5076 days | 37% |
| Gillian MacLaren | 8/10 | 5077 days | 36% |
| Eline Vakentijn | 8/10 | 5077 days | 36% |
| Langerak | 9/10 | 5079 days | 37% |
| Magda Savels | 8/10 | 5085 days | 36% |
| Roger ter Horst | 9/10 | 5087 days | 37% |
| Maria Dietrich | 9/10 | 5087 days | 37% |
| Samplonius | 8/10 | 5087 days | 36% |
| Manuela Zimmerti | 9/10 | 5155 days | 37% |
| Dirk Faupel | 9/10 | 5158 days | 37% |
| Dirk Faupel | 9/10 | 5158 days | 37% |
| Robert Carswell | 7/10 | 5160 days | 35% |
| Marc & Pauline | 8/10 | 5160 days | 36% |
| Gerard Crothers | 10/10 | 5161 days | 37% |
| Steve Eley | 7/10 | 5163 days | 35% |
| van Rees | 8/10 | 5163 days | 36% |
| Ron & Hannah de Reuver | 9/10 | 5168 days | 37% |
| Wolfgang Goggel | 9/10 | 5168 days | 37% |
| Gary A | 7/10 | 5184 days | 35% |
| Tina | 9/10 | 5184 days | 37% |
| Jon_and_Family | 8/10 | 5398 days | 36% |
| Franzi & Tobi | 9/10 | 5409 days | 37% |
| Oliver Berg | 7/10 | 5412 days | 35% |
| Marianne Wheatley | 10/10 | 5417 days | 37% |
| Krabbe | 8/10 | 5420 days | 36% |
| Rolf | 4/10 | 5420 days | 24% |
| Malcolm Jones | 8/10 | 5422 days | 36% |
| Berger | 8/10 | 5433 days | 36% |
| Pieter | 9/10 | 5434 days | 37% |
| mr Schumader | 9/10 | 5443 days | 37% |
| Tamlin Barton | 6/10 | 5444 days | 32% |
| Tim Van Nispen | 8/10 | 5445 days | 36% |
| Johanna | 6/10 | 5446 days | 32% |
| Eva Stauderova | 10/10 | 5448 days | 37% |
| Patrick Decoster | 9/10 | 5450 days | 37% |
| Liz Dolman | 8/10 | 5452 days | 36% |
| Kay and Colin Yendole | 9/10 | 5453 days | 37% |
| Chamton | 6/10 | 5457 days | 32% |
| willsworthy | 9/10 | 5549 days | 37% |
| allesca | 8/10 | 5580 days | 36% |
| Bergemann | 8/10 | 5780 days | 36% |
| Silke Seemann | 9/10 | 5785 days | 37% |
| John Harrison | 8/10 | 5801 days | 36% |
| Tanja Haring | 9/10 | 5807 days | 37% |
| Amanda Hoff | 10/10 | 5822 days | 37% |
| Beute Jacob | 8/10 | 5835 days | 36% |
| Alies van der plank | 8/10 | 5839 days | 36% |
| mariekef | 10/10 | 5868 days | 37% |
| sanneb1 | 8/10 | 5869 days | 36% |
| keane | 7/10 | 5869 days | 35% |
| mariak | 8/10 | 5870 days | 36% |
| usigmund | 8/10 | 5873 days | 36% |
| hofstetterf | 10/10 | 5882 days | 37% |
| Stefan Lua | 10/10 | 5886 days | 37% |
| Peter Essink | 9/10 | 5886 days | 37% |
| Wolfgang Mages | 10/10 | 5888 days | 37% |
| Ann S | 10/10 | 5892 days | 37% |
| Roeder Grit | 8/10 | 5895 days | 36% |
| ulrichk | 10/10 | 6001 days | 37% |
| gerrys | 7/10 | 6083 days | 35% |
| RolandV | 10/10 | 6112 days | 37% |
| GemmaC | 8/10 | 6117 days | 36% |
| CeesVanW | 8/10 | 6125 days | 36% |
| LaurensD | 7/10 | 6128 days | 35% |
| StefanieA | 10/10 | 6130 days | 37% |
| Hendrik Flier | 7/10 | 6134 days | 35% |
| PBouwmessten | 9/10 | 6148 days | 37% |
| MauzcoV | 9/10 | 6148 days | 37% |
| marcusr | 9/10 | 6170 days | 37% |
| Eugene | 10/10 | 6170 days | 37% |
| Tony | 10/10 | 6176 days | 37% |
| Ian S | 9/10 | 6177 days | 37% |
| Miguel | 9/10 | 6179 days | 37% |
| Thamar | 8/10 | 6193 days | 36% |
| Andie | 10/10 | 6200 days | 37% |
| Miranda | 8/10 | 6205 days | 36% |
| Miha | 10/10 | 6233 days | 37% |
| Gerits | 10/10 | 6241 days | 37% |
| Sluijs | 10/10 | 6245 days | 37% |
| olland | 10/10 | 6249 days | 37% |
| Liz | 10/10 | 6268 days | 37% |
| Stefan | 9/10 | 6292 days | 37% |
| Cory Fusco | 8/10 | 6353 days | 36% |
| Katie Wise | 10/10 | 6361 days | 37% |
| Heckter | 7/10 | 6499 days | 35% |
| Jennifer Baulch | 9/10 | 6504 days | 37% |
| Nancy Dol | 7/10 | 6525 days | 35% |
| David Buckley | 9/10 | 6528 days | 37% |
| Jenny Hulsebosch | 9/10 | 6556 days | 37% |
| Peter | 10/10 | 6597 days | 37% |
| bart | 6/10 | 6602 days | 32% |
| Miriam&Eva | 5/10 | 6818 days | 28% |
| Dennis | 8/10 | 6875 days | 36% |
| Arjan | 7/10 | 6889 days | 35% |
| Meyer | 9/10 | 6891 days | 37% |
| Lucy | 8/10 | 6893 days | 36% |
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
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 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 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
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.