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
83.83%
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 | 2625 days | 67% |
| Rado Hank | 8/10 | 2954 days | 100% |
| Matthias and Adriane | 9/10 | 3209 days | 82% |
| Laure and Pascal | 9/10 | 3222 days | 82% |
| Thomas Klinting | 10/10 | 3248 days | 80% |
| Helna Saumanova | 9/10 | 3253 days | 79% |
| Danny | 7/10 | 3305 days | 71% |
| Marine Lavie | 8/10 | 3567 days | 56% |
| Cate Ronke | 8/10 | 3570 days | 56% |
| Stephan Friedrich | 9/10 | 3586 days | 55% |
| Stula Vladimir | 10/10 | 3604 days | 54% |
| Isabelle | 10/10 | 3607 days | 54% |
| Mikkel Palleson | 7/10 | 3610 days | 50% |
| Meilin | 5/10 | 3616 days | 40% |
| Sebastian and Susanna | 7/10 | 3655 days | 47% |
| Jakob Gerber | 7/10 | 3660 days | 46% |
| Marie Weber | 9/10 | 3969 days | 27% |
| Erik Hafuer | 4/10 | 4003 days | 15% |
| Caroline Jonsson | 7/10 | 4268 days | 5% |
| Jonny Ronnblom | 7/10 | 4268 days | 5% |
| Catherine Schlachter | 9/10 | 4275 days | 5% |
| Christina Perez | 8/10 | 4275 days | 5% |
| Bea Westkam | 10/10 | 4284 days | 4% |
| Julia Moellers | 8/10 | 4284 days | 4% |
| Anne Haenchen | 8/10 | 4300 days | 3% |
| Kathi | 8/10 | 4300 days | 3% |
| Sophia | 7/10 | 4317 days | 1% |
| Lukas | 6/10 | 4326 days | 1% |
| Celine Darde | 8/10 | 4340 days | 0% |
| Ludovic Denee | 8/10 | 4340 days | 0% |
| Melanie Pretzel | 8/10 | 4667 days | 34% |
| Frederic Birke | 8/10 | 4667 days | 34% |
| Andre and Marina | 2/10 | 4698 days | 14% |
| Hanneke P | 7/10 | 4724 days | 32% |
| Joroen Borkert | 9/10 | 4742 days | 34% |
| Roux | 8/10 | 4745 days | 34% |
| Leo | 9/10 | 4759 days | 34% |
| Lutz Huuemorder | 8/10 | 4761 days | 34% |
| Henzen | 8/10 | 4764 days | 34% |
| Tuedi Muggli | 10/10 | 5027 days | 35% |
| Romla | 8/10 | 5037 days | 34% |
| Ronald Veldman | 8/10 | 5037 days | 34% |
| Richard | 8/10 | 5040 days | 34% |
| Marie Dutron | 6/10 | 5040 days | 30% |
| Carl & Desiree Potter | 9/10 | 5042 days | 34% |
| Frans | 10/10 | 5042 days | 35% |
| Preben vil Helmsen | 10/10 | 5042 days | 35% |
| Johann Maier | 10/10 | 5043 days | 35% |
| Gillian MacLaren | 8/10 | 5044 days | 34% |
| Eline Vakentijn | 8/10 | 5044 days | 34% |
| Langerak | 9/10 | 5046 days | 34% |
| Magda Savels | 8/10 | 5052 days | 34% |
| Roger ter Horst | 9/10 | 5054 days | 34% |
| Maria Dietrich | 9/10 | 5054 days | 34% |
| Samplonius | 8/10 | 5054 days | 34% |
| Manuela Zimmerti | 9/10 | 5122 days | 34% |
| Dirk Faupel | 9/10 | 5125 days | 34% |
| Dirk Faupel | 9/10 | 5125 days | 34% |
| Robert Carswell | 7/10 | 5127 days | 32% |
| Marc & Pauline | 8/10 | 5127 days | 34% |
| Gerard Crothers | 10/10 | 5128 days | 35% |
| Steve Eley | 7/10 | 5130 days | 32% |
| van Rees | 8/10 | 5130 days | 34% |
| Ron & Hannah de Reuver | 9/10 | 5135 days | 34% |
| Wolfgang Goggel | 9/10 | 5135 days | 34% |
| Gary A | 7/10 | 5151 days | 32% |
| Tina | 9/10 | 5151 days | 34% |
| Jon_and_Family | 8/10 | 5365 days | 34% |
| Franzi & Tobi | 9/10 | 5376 days | 34% |
| Oliver Berg | 7/10 | 5379 days | 32% |
| Marianne Wheatley | 10/10 | 5384 days | 35% |
| Krabbe | 8/10 | 5387 days | 34% |
| Rolf | 4/10 | 5387 days | 22% |
| Malcolm Jones | 8/10 | 5389 days | 34% |
| Berger | 8/10 | 5400 days | 34% |
| Pieter | 9/10 | 5401 days | 34% |
| mr Schumader | 9/10 | 5410 days | 34% |
| Tamlin Barton | 6/10 | 5411 days | 30% |
| Tim Van Nispen | 8/10 | 5412 days | 34% |
| Johanna | 6/10 | 5413 days | 30% |
| Eva Stauderova | 10/10 | 5415 days | 35% |
| Patrick Decoster | 9/10 | 5417 days | 34% |
| Liz Dolman | 8/10 | 5419 days | 34% |
| Kay and Colin Yendole | 9/10 | 5420 days | 34% |
| Chamton | 6/10 | 5424 days | 30% |
| willsworthy | 9/10 | 5516 days | 34% |
| allesca | 8/10 | 5547 days | 34% |
| Bergemann | 8/10 | 5747 days | 34% |
| Silke Seemann | 9/10 | 5752 days | 34% |
| John Harrison | 8/10 | 5768 days | 34% |
| Tanja Haring | 9/10 | 5774 days | 34% |
| Amanda Hoff | 10/10 | 5789 days | 35% |
| Beute Jacob | 8/10 | 5802 days | 34% |
| Alies van der plank | 8/10 | 5806 days | 34% |
| mariekef | 10/10 | 5835 days | 35% |
| sanneb1 | 8/10 | 5836 days | 34% |
| keane | 7/10 | 5836 days | 32% |
| mariak | 8/10 | 5837 days | 34% |
| usigmund | 8/10 | 5840 days | 34% |
| hofstetterf | 10/10 | 5849 days | 35% |
| Stefan Lua | 10/10 | 5853 days | 35% |
| Peter Essink | 9/10 | 5853 days | 34% |
| Wolfgang Mages | 10/10 | 5855 days | 35% |
| Ann S | 10/10 | 5859 days | 35% |
| Roeder Grit | 8/10 | 5862 days | 34% |
| ulrichk | 10/10 | 5967 days | 35% |
| gerrys | 7/10 | 6049 days | 32% |
| RolandV | 10/10 | 6078 days | 35% |
| GemmaC | 8/10 | 6083 days | 34% |
| CeesVanW | 8/10 | 6092 days | 34% |
| LaurensD | 7/10 | 6095 days | 32% |
| StefanieA | 10/10 | 6097 days | 35% |
| Hendrik Flier | 7/10 | 6101 days | 32% |
| PBouwmessten | 9/10 | 6115 days | 34% |
| MauzcoV | 9/10 | 6115 days | 34% |
| marcusr | 9/10 | 6136 days | 34% |
| Eugene | 10/10 | 6136 days | 35% |
| Tony | 10/10 | 6143 days | 35% |
| Ian S | 9/10 | 6144 days | 34% |
| Miguel | 9/10 | 6145 days | 34% |
| Thamar | 8/10 | 6159 days | 34% |
| Andie | 10/10 | 6167 days | 35% |
| Miranda | 8/10 | 6171 days | 34% |
| Miha | 10/10 | 6199 days | 35% |
| Gerits | 10/10 | 6207 days | 35% |
| Sluijs | 10/10 | 6212 days | 35% |
| olland | 10/10 | 6215 days | 35% |
| Liz | 10/10 | 6234 days | 35% |
| Stefan | 9/10 | 6258 days | 34% |
| Cory Fusco | 8/10 | 6319 days | 34% |
| Katie Wise | 10/10 | 6327 days | 35% |
| Heckter | 7/10 | 6466 days | 32% |
| Jennifer Baulch | 9/10 | 6471 days | 34% |
| Nancy Dol | 7/10 | 6492 days | 32% |
| David Buckley | 9/10 | 6495 days | 34% |
| Jenny Hulsebosch | 9/10 | 6523 days | 34% |
| Peter | 10/10 | 6564 days | 35% |
| bart | 6/10 | 6569 days | 30% |
| Miriam&Eva | 5/10 | 6784 days | 26% |
| Dennis | 8/10 | 6842 days | 34% |
| Arjan | 7/10 | 6856 days | 32% |
| Meyer | 9/10 | 6858 days | 34% |
| Lucy | 8/10 | 6860 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
-4.07% 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
3.07% 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.