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.
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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
83.43%
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 | 2371 days | 61% |
| Rado Hank | 8/10 | 2700 days | 100% |
| Matthias and Adriane | 9/10 | 2955 days | 83% |
| Laure and Pascal | 9/10 | 2968 days | 82% |
| Thomas Klinting | 10/10 | 2994 days | 82% |
| Helna Saumanova | 9/10 | 2999 days | 80% |
| Danny | 7/10 | 3051 days | 71% |
| Marine Lavie | 8/10 | 3313 days | 58% |
| Cate Ronke | 8/10 | 3316 days | 57% |
| Stephan Friedrich | 9/10 | 3332 days | 57% |
| Stula Vladimir | 10/10 | 3350 days | 56% |
| Isabelle | 10/10 | 3353 days | 56% |
| Mikkel Palleson | 7/10 | 3356 days | 51% |
| Meilin | 5/10 | 3362 days | 38% |
| Sebastian and Susanna | 7/10 | 3401 days | 48% |
| Jakob Gerber | 7/10 | 3406 days | 48% |
| Marie Weber | 9/10 | 3715 days | 30% |
| Erik Hafuer | 4/10 | 3749 days | 13% |
| Caroline Jonsson | 7/10 | 4014 days | 8% |
| Jonny Ronnblom | 7/10 | 4014 days | 8% |
| Catherine Schlachter | 9/10 | 4021 days | 9% |
| Christina Perez | 8/10 | 4021 days | 8% |
| Bea Westkam | 10/10 | 4030 days | 8% |
| Julia Moellers | 8/10 | 4030 days | 8% |
| Anne Haenchen | 8/10 | 4046 days | 7% |
| Kathi | 8/10 | 4046 days | 7% |
| Sophia | 7/10 | 4063 days | 4% |
| Lukas | 6/10 | 4072 days | 2% |
| Celine Darde | 8/10 | 4086 days | 4% |
| Ludovic Denee | 8/10 | 4086 days | 4% |
| Melanie Pretzel | 8/10 | 4413 days | 19% |
| Frederic Birke | 8/10 | 4413 days | 19% |
| Andre and Marina | 2/10 | 4444 days | 0% |
| Hanneke P | 7/10 | 4470 days | 17% |
| Joroen Borkert | 9/10 | 4488 days | 19% |
| Roux | 8/10 | 4491 days | 19% |
| Leo | 9/10 | 4505 days | 19% |
| Lutz Huuemorder | 8/10 | 4507 days | 19% |
| Henzen | 8/10 | 4510 days | 19% |
| Tuedi Muggli | 10/10 | 4773 days | 20% |
| Romla | 8/10 | 4783 days | 19% |
| Ronald Veldman | 8/10 | 4783 days | 19% |
| Richard | 8/10 | 4786 days | 19% |
| Marie Dutron | 6/10 | 4786 days | 15% |
| Carl & Desiree Potter | 9/10 | 4788 days | 19% |
| Frans | 10/10 | 4788 days | 20% |
| Preben vil Helmsen | 10/10 | 4788 days | 20% |
| Johann Maier | 10/10 | 4789 days | 20% |
| Gillian MacLaren | 8/10 | 4790 days | 19% |
| Eline Vakentijn | 8/10 | 4790 days | 19% |
| Langerak | 9/10 | 4792 days | 19% |
| Magda Savels | 8/10 | 4798 days | 19% |
| Roger ter Horst | 9/10 | 4800 days | 19% |
| Maria Dietrich | 9/10 | 4800 days | 19% |
| Samplonius | 8/10 | 4800 days | 19% |
| Manuela Zimmerti | 9/10 | 4868 days | 19% |
| Dirk Faupel | 9/10 | 4871 days | 19% |
| Dirk Faupel | 9/10 | 4871 days | 19% |
| Robert Carswell | 7/10 | 4873 days | 17% |
| Marc & Pauline | 8/10 | 4873 days | 19% |
| Gerard Crothers | 10/10 | 4874 days | 20% |
| Steve Eley | 7/10 | 4876 days | 17% |
| van Rees | 8/10 | 4876 days | 19% |
| Ron & Hannah de Reuver | 9/10 | 4881 days | 19% |
| Wolfgang Goggel | 9/10 | 4881 days | 19% |
| Gary A | 7/10 | 4897 days | 17% |
| Tina | 9/10 | 4897 days | 19% |
| Jon_and_Family | 8/10 | 5111 days | 19% |
| Franzi & Tobi | 9/10 | 5122 days | 19% |
| Oliver Berg | 7/10 | 5125 days | 17% |
| Marianne Wheatley | 10/10 | 5130 days | 20% |
| Krabbe | 8/10 | 5133 days | 19% |
| Rolf | 4/10 | 5133 days | 7% |
| Malcolm Jones | 8/10 | 5135 days | 19% |
| Berger | 8/10 | 5146 days | 19% |
| Pieter | 9/10 | 5147 days | 19% |
| mr Schumader | 9/10 | 5156 days | 19% |
| Tamlin Barton | 6/10 | 5157 days | 15% |
| Tim Van Nispen | 8/10 | 5158 days | 19% |
| Johanna | 6/10 | 5159 days | 15% |
| Eva Stauderova | 10/10 | 5161 days | 20% |
| Patrick Decoster | 9/10 | 5163 days | 19% |
| Liz Dolman | 8/10 | 5165 days | 19% |
| Kay and Colin Yendole | 9/10 | 5166 days | 19% |
| Chamton | 6/10 | 5170 days | 15% |
| willsworthy | 9/10 | 5262 days | 19% |
| allesca | 8/10 | 5293 days | 19% |
| Bergemann | 8/10 | 5493 days | 19% |
| Silke Seemann | 9/10 | 5498 days | 19% |
| John Harrison | 8/10 | 5514 days | 19% |
| Tanja Haring | 9/10 | 5520 days | 19% |
| Amanda Hoff | 10/10 | 5535 days | 20% |
| Beute Jacob | 8/10 | 5548 days | 19% |
| Alies van der plank | 8/10 | 5552 days | 19% |
| mariekef | 10/10 | 5581 days | 20% |
| sanneb1 | 8/10 | 5582 days | 19% |
| keane | 7/10 | 5582 days | 17% |
| mariak | 8/10 | 5583 days | 19% |
| usigmund | 8/10 | 5586 days | 19% |
| hofstetterf | 10/10 | 5595 days | 20% |
| Stefan Lua | 10/10 | 5599 days | 20% |
| Peter Essink | 9/10 | 5599 days | 19% |
| Wolfgang Mages | 10/10 | 5601 days | 20% |
| Ann S | 10/10 | 5605 days | 20% |
| Roeder Grit | 8/10 | 5608 days | 19% |
| ulrichk | 10/10 | 5714 days | 20% |
| gerrys | 7/10 | 5796 days | 17% |
| RolandV | 10/10 | 5825 days | 20% |
| GemmaC | 8/10 | 5830 days | 19% |
| CeesVanW | 8/10 | 5838 days | 19% |
| LaurensD | 7/10 | 5841 days | 17% |
| StefanieA | 10/10 | 5843 days | 20% |
| Hendrik Flier | 7/10 | 5847 days | 17% |
| PBouwmessten | 9/10 | 5861 days | 19% |
| MauzcoV | 9/10 | 5861 days | 19% |
| marcusr | 9/10 | 5882 days | 19% |
| Eugene | 10/10 | 5883 days | 20% |
| Tony | 10/10 | 5889 days | 20% |
| Ian S | 9/10 | 5890 days | 19% |
| Miguel | 9/10 | 5892 days | 19% |
| Thamar | 8/10 | 5906 days | 19% |
| Andie | 10/10 | 5913 days | 20% |
| Miranda | 8/10 | 5918 days | 19% |
| Miha | 10/10 | 5946 days | 20% |
| Gerits | 10/10 | 5954 days | 20% |
| Sluijs | 10/10 | 5958 days | 20% |
| olland | 10/10 | 5962 days | 20% |
| Liz | 10/10 | 5981 days | 20% |
| Stefan | 9/10 | 6005 days | 19% |
| Cory Fusco | 8/10 | 6066 days | 19% |
| Katie Wise | 10/10 | 6074 days | 20% |
| Heckter | 7/10 | 6212 days | 17% |
| Jennifer Baulch | 9/10 | 6217 days | 19% |
| Nancy Dol | 7/10 | 6238 days | 17% |
| David Buckley | 9/10 | 6241 days | 19% |
| Jenny Hulsebosch | 9/10 | 6269 days | 19% |
| Peter | 10/10 | 6310 days | 20% |
| bart | 6/10 | 6315 days | 15% |
| Miriam&Eva | 5/10 | 6531 days | 11% |
| Dennis | 8/10 | 6588 days | 19% |
| Arjan | 7/10 | 6602 days | 17% |
| Meyer | 9/10 | 6604 days | 19% |
| Lucy | 8/10 | 6606 days | 19% |
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
-3.79% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 59 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 | -3.73% |
| 198 | -3.75% |
| 199 | -3.77% |
| 200 | -3.79% |
| 201 | -3.81% |
| 202 | -3.83% |
| 203 | -3.85% |
| … | … |
Balancing Adjustment
3.10% 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.