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
83.63%
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 | 2718 days | 69% |
| Rado Hank | 8/10 | 3047 days | 100% |
| Matthias and Adriane | 9/10 | 3302 days | 82% |
| Laure and Pascal | 9/10 | 3315 days | 81% |
| Thomas Klinting | 10/10 | 3341 days | 79% |
| Helna Saumanova | 9/10 | 3346 days | 78% |
| Danny | 7/10 | 3398 days | 70% |
| Marine Lavie | 8/10 | 3660 days | 54% |
| Cate Ronke | 8/10 | 3663 days | 54% |
| Stephan Friedrich | 9/10 | 3679 days | 53% |
| Stula Vladimir | 10/10 | 3697 days | 52% |
| Isabelle | 10/10 | 3700 days | 52% |
| Mikkel Palleson | 7/10 | 3703 days | 48% |
| Meilin | 5/10 | 3709 days | 39% |
| Sebastian and Susanna | 7/10 | 3748 days | 45% |
| Jakob Gerber | 7/10 | 3753 days | 45% |
| Marie Weber | 9/10 | 4062 days | 24% |
| Erik Hafuer | 4/10 | 4096 days | 14% |
| Caroline Jonsson | 7/10 | 4361 days | 1% |
| Jonny Ronnblom | 7/10 | 4361 days | 1% |
| Catherine Schlachter | 9/10 | 4368 days | 1% |
| Christina Perez | 8/10 | 4368 days | 1% |
| Bea Westkam | 10/10 | 4377 days | 0% |
| Julia Moellers | 8/10 | 4377 days | 0% |
| Anne Haenchen | 8/10 | 4393 days | 38% |
| Kathi | 8/10 | 4393 days | 38% |
| Sophia | 7/10 | 4410 days | 36% |
| Lukas | 6/10 | 4419 days | 34% |
| Celine Darde | 8/10 | 4433 days | 38% |
| Ludovic Denee | 8/10 | 4433 days | 38% |
| Melanie Pretzel | 8/10 | 4760 days | 38% |
| Frederic Birke | 8/10 | 4760 days | 38% |
| Andre and Marina | 2/10 | 4791 days | 18% |
| Hanneke P | 7/10 | 4817 days | 36% |
| Joroen Borkert | 9/10 | 4835 days | 39% |
| Roux | 8/10 | 4838 days | 38% |
| Leo | 9/10 | 4852 days | 39% |
| Lutz Huuemorder | 8/10 | 4854 days | 38% |
| Henzen | 8/10 | 4857 days | 38% |
| Tuedi Muggli | 10/10 | 5120 days | 39% |
| Romla | 8/10 | 5130 days | 38% |
| Ronald Veldman | 8/10 | 5130 days | 38% |
| Richard | 8/10 | 5133 days | 38% |
| Marie Dutron | 6/10 | 5133 days | 34% |
| Carl & Desiree Potter | 9/10 | 5135 days | 39% |
| Frans | 10/10 | 5135 days | 39% |
| Preben vil Helmsen | 10/10 | 5135 days | 39% |
| Johann Maier | 10/10 | 5136 days | 39% |
| Gillian MacLaren | 8/10 | 5137 days | 38% |
| Eline Vakentijn | 8/10 | 5137 days | 38% |
| Langerak | 9/10 | 5139 days | 39% |
| Magda Savels | 8/10 | 5145 days | 38% |
| Roger ter Horst | 9/10 | 5147 days | 39% |
| Maria Dietrich | 9/10 | 5147 days | 39% |
| Samplonius | 8/10 | 5147 days | 38% |
| Manuela Zimmerti | 9/10 | 5215 days | 39% |
| Dirk Faupel | 9/10 | 5218 days | 39% |
| Dirk Faupel | 9/10 | 5218 days | 39% |
| Robert Carswell | 7/10 | 5220 days | 36% |
| Marc & Pauline | 8/10 | 5220 days | 38% |
| Gerard Crothers | 10/10 | 5221 days | 39% |
| Steve Eley | 7/10 | 5223 days | 36% |
| van Rees | 8/10 | 5223 days | 38% |
| Ron & Hannah de Reuver | 9/10 | 5228 days | 39% |
| Wolfgang Goggel | 9/10 | 5228 days | 39% |
| Gary A | 7/10 | 5244 days | 36% |
| Tina | 9/10 | 5244 days | 39% |
| Jon_and_Family | 8/10 | 5458 days | 38% |
| Franzi & Tobi | 9/10 | 5469 days | 39% |
| Oliver Berg | 7/10 | 5472 days | 36% |
| Marianne Wheatley | 10/10 | 5477 days | 39% |
| Krabbe | 8/10 | 5480 days | 38% |
| Rolf | 4/10 | 5480 days | 25% |
| Malcolm Jones | 8/10 | 5482 days | 38% |
| Berger | 8/10 | 5493 days | 38% |
| Pieter | 9/10 | 5494 days | 39% |
| mr Schumader | 9/10 | 5503 days | 39% |
| Tamlin Barton | 6/10 | 5504 days | 34% |
| Tim Van Nispen | 8/10 | 5505 days | 38% |
| Johanna | 6/10 | 5506 days | 34% |
| Eva Stauderova | 10/10 | 5508 days | 39% |
| Patrick Decoster | 9/10 | 5510 days | 39% |
| Liz Dolman | 8/10 | 5512 days | 38% |
| Kay and Colin Yendole | 9/10 | 5513 days | 39% |
| Chamton | 6/10 | 5517 days | 34% |
| willsworthy | 9/10 | 5609 days | 39% |
| allesca | 8/10 | 5640 days | 38% |
| Bergemann | 8/10 | 5840 days | 38% |
| Silke Seemann | 9/10 | 5845 days | 39% |
| John Harrison | 8/10 | 5861 days | 38% |
| Tanja Haring | 9/10 | 5867 days | 39% |
| Amanda Hoff | 10/10 | 5882 days | 39% |
| Beute Jacob | 8/10 | 5895 days | 38% |
| Alies van der plank | 8/10 | 5899 days | 38% |
| mariekef | 10/10 | 5928 days | 39% |
| sanneb1 | 8/10 | 5929 days | 38% |
| keane | 7/10 | 5929 days | 36% |
| mariak | 8/10 | 5930 days | 38% |
| usigmund | 8/10 | 5933 days | 38% |
| hofstetterf | 10/10 | 5942 days | 39% |
| Stefan Lua | 10/10 | 5946 days | 39% |
| Peter Essink | 9/10 | 5946 days | 39% |
| Wolfgang Mages | 10/10 | 5948 days | 39% |
| Ann S | 10/10 | 5952 days | 39% |
| Roeder Grit | 8/10 | 5955 days | 38% |
| ulrichk | 10/10 | 6061 days | 39% |
| gerrys | 7/10 | 6143 days | 36% |
| RolandV | 10/10 | 6172 days | 39% |
| GemmaC | 8/10 | 6177 days | 38% |
| CeesVanW | 8/10 | 6185 days | 38% |
| LaurensD | 7/10 | 6188 days | 36% |
| StefanieA | 10/10 | 6190 days | 39% |
| Hendrik Flier | 7/10 | 6194 days | 36% |
| PBouwmessten | 9/10 | 6208 days | 39% |
| MauzcoV | 9/10 | 6208 days | 39% |
| marcusr | 9/10 | 6229 days | 39% |
| Eugene | 10/10 | 6229 days | 39% |
| Tony | 10/10 | 6236 days | 39% |
| Ian S | 9/10 | 6237 days | 39% |
| Miguel | 9/10 | 6238 days | 39% |
| Thamar | 8/10 | 6252 days | 38% |
| Andie | 10/10 | 6260 days | 39% |
| Miranda | 8/10 | 6264 days | 38% |
| Miha | 10/10 | 6293 days | 39% |
| Gerits | 10/10 | 6300 days | 39% |
| Sluijs | 10/10 | 6305 days | 39% |
| olland | 10/10 | 6308 days | 39% |
| Liz | 10/10 | 6327 days | 39% |
| Stefan | 9/10 | 6352 days | 39% |
| Cory Fusco | 8/10 | 6412 days | 38% |
| Katie Wise | 10/10 | 6420 days | 39% |
| Heckter | 7/10 | 6559 days | 36% |
| Jennifer Baulch | 9/10 | 6564 days | 39% |
| Nancy Dol | 7/10 | 6585 days | 36% |
| David Buckley | 9/10 | 6588 days | 39% |
| Jenny Hulsebosch | 9/10 | 6616 days | 39% |
| Peter | 10/10 | 6657 days | 39% |
| bart | 6/10 | 6662 days | 34% |
| Miriam&Eva | 5/10 | 6878 days | 30% |
| Dennis | 8/10 | 6935 days | 38% |
| Arjan | 7/10 | 6949 days | 36% |
| Meyer | 9/10 | 6951 days | 39% |
| Lucy | 8/10 | 6953 days | 38% |
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
-4.03% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 57 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 | -3.97% |
| 198 | -3.99% |
| 199 | -4.01% |
| 200 | -4.03% |
| 201 | -4.05% |
| 202 | -4.07% |
| 203 | -4.09% |
| … | … |
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.