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
83.56%
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 | 2456 days | 62% |
| Rado Hank | 8/10 | 2785 days | 100% |
| Matthias and Adriane | 9/10 | 3040 days | 83% |
| Laure and Pascal | 9/10 | 3053 days | 82% |
| Thomas Klinting | 10/10 | 3079 days | 81% |
| Helna Saumanova | 9/10 | 3084 days | 80% |
| Danny | 7/10 | 3136 days | 70% |
| Marine Lavie | 8/10 | 3398 days | 56% |
| Cate Ronke | 8/10 | 3401 days | 56% |
| Stephan Friedrich | 9/10 | 3417 days | 56% |
| Stula Vladimir | 10/10 | 3435 days | 55% |
| Isabelle | 10/10 | 3438 days | 55% |
| Mikkel Palleson | 7/10 | 3441 days | 50% |
| Meilin | 5/10 | 3447 days | 38% |
| Sebastian and Susanna | 7/10 | 3486 days | 47% |
| Jakob Gerber | 7/10 | 3491 days | 46% |
| Marie Weber | 9/10 | 3800 days | 28% |
| Erik Hafuer | 4/10 | 3834 days | 12% |
| Caroline Jonsson | 7/10 | 4099 days | 5% |
| Jonny Ronnblom | 7/10 | 4099 days | 5% |
| Catherine Schlachter | 9/10 | 4106 days | 6% |
| Christina Perez | 8/10 | 4106 days | 6% |
| Bea Westkam | 10/10 | 4115 days | 5% |
| Julia Moellers | 8/10 | 4115 days | 5% |
| Anne Haenchen | 8/10 | 4131 days | 4% |
| Kathi | 8/10 | 4131 days | 4% |
| Sophia | 7/10 | 4148 days | 2% |
| Lukas | 6/10 | 4157 days | 0% |
| Celine Darde | 8/10 | 4171 days | 1% |
| Ludovic Denee | 8/10 | 4171 days | 1% |
| Melanie Pretzel | 8/10 | 4498 days | 23% |
| Frederic Birke | 8/10 | 4498 days | 23% |
| Andre and Marina | 2/10 | 4529 days | 3% |
| Hanneke P | 7/10 | 4555 days | 21% |
| Joroen Borkert | 9/10 | 4573 days | 23% |
| Roux | 8/10 | 4576 days | 23% |
| Leo | 9/10 | 4590 days | 23% |
| Lutz Huuemorder | 8/10 | 4592 days | 23% |
| Henzen | 8/10 | 4595 days | 23% |
| Tuedi Muggli | 10/10 | 4858 days | 23% |
| Romla | 8/10 | 4868 days | 23% |
| Ronald Veldman | 8/10 | 4868 days | 23% |
| Richard | 8/10 | 4871 days | 23% |
| Marie Dutron | 6/10 | 4871 days | 18% |
| Carl & Desiree Potter | 9/10 | 4873 days | 23% |
| Frans | 10/10 | 4873 days | 23% |
| Preben vil Helmsen | 10/10 | 4873 days | 23% |
| Johann Maier | 10/10 | 4874 days | 23% |
| Gillian MacLaren | 8/10 | 4875 days | 23% |
| Eline Vakentijn | 8/10 | 4875 days | 23% |
| Langerak | 9/10 | 4877 days | 23% |
| Magda Savels | 8/10 | 4883 days | 23% |
| Roger ter Horst | 9/10 | 4885 days | 23% |
| Maria Dietrich | 9/10 | 4885 days | 23% |
| Samplonius | 8/10 | 4885 days | 23% |
| Manuela Zimmerti | 9/10 | 4953 days | 23% |
| Dirk Faupel | 9/10 | 4956 days | 23% |
| Dirk Faupel | 9/10 | 4956 days | 23% |
| Robert Carswell | 7/10 | 4958 days | 21% |
| Marc & Pauline | 8/10 | 4958 days | 23% |
| Gerard Crothers | 10/10 | 4959 days | 23% |
| Steve Eley | 7/10 | 4961 days | 21% |
| van Rees | 8/10 | 4961 days | 23% |
| Ron & Hannah de Reuver | 9/10 | 4966 days | 23% |
| Wolfgang Goggel | 9/10 | 4966 days | 23% |
| Gary A | 7/10 | 4982 days | 21% |
| Tina | 9/10 | 4982 days | 23% |
| Jon_and_Family | 8/10 | 5196 days | 23% |
| Franzi & Tobi | 9/10 | 5207 days | 23% |
| Oliver Berg | 7/10 | 5210 days | 21% |
| Marianne Wheatley | 10/10 | 5215 days | 23% |
| Krabbe | 8/10 | 5218 days | 23% |
| Rolf | 4/10 | 5218 days | 10% |
| Malcolm Jones | 8/10 | 5220 days | 23% |
| Berger | 8/10 | 5231 days | 23% |
| Pieter | 9/10 | 5232 days | 23% |
| mr Schumader | 9/10 | 5241 days | 23% |
| Tamlin Barton | 6/10 | 5242 days | 18% |
| Tim Van Nispen | 8/10 | 5243 days | 23% |
| Johanna | 6/10 | 5244 days | 18% |
| Eva Stauderova | 10/10 | 5246 days | 23% |
| Patrick Decoster | 9/10 | 5248 days | 23% |
| Liz Dolman | 8/10 | 5250 days | 23% |
| Kay and Colin Yendole | 9/10 | 5251 days | 23% |
| Chamton | 6/10 | 5255 days | 18% |
| willsworthy | 9/10 | 5347 days | 23% |
| allesca | 8/10 | 5378 days | 23% |
| Bergemann | 8/10 | 5578 days | 23% |
| Silke Seemann | 9/10 | 5583 days | 23% |
| John Harrison | 8/10 | 5599 days | 23% |
| Tanja Haring | 9/10 | 5605 days | 23% |
| Amanda Hoff | 10/10 | 5620 days | 23% |
| Beute Jacob | 8/10 | 5633 days | 23% |
| Alies van der plank | 8/10 | 5637 days | 23% |
| mariekef | 10/10 | 5666 days | 23% |
| sanneb1 | 8/10 | 5667 days | 23% |
| keane | 7/10 | 5667 days | 21% |
| mariak | 8/10 | 5668 days | 23% |
| usigmund | 8/10 | 5671 days | 23% |
| hofstetterf | 10/10 | 5680 days | 23% |
| Stefan Lua | 10/10 | 5684 days | 23% |
| Peter Essink | 9/10 | 5684 days | 23% |
| Wolfgang Mages | 10/10 | 5686 days | 23% |
| Ann S | 10/10 | 5690 days | 23% |
| Roeder Grit | 8/10 | 5693 days | 23% |
| ulrichk | 10/10 | 5799 days | 23% |
| gerrys | 7/10 | 5881 days | 21% |
| RolandV | 10/10 | 5910 days | 23% |
| GemmaC | 8/10 | 5915 days | 23% |
| CeesVanW | 8/10 | 5923 days | 23% |
| LaurensD | 7/10 | 5926 days | 21% |
| StefanieA | 10/10 | 5928 days | 23% |
| Hendrik Flier | 7/10 | 5932 days | 21% |
| PBouwmessten | 9/10 | 5946 days | 23% |
| MauzcoV | 9/10 | 5946 days | 23% |
| marcusr | 9/10 | 5967 days | 23% |
| Eugene | 10/10 | 5967 days | 23% |
| Tony | 10/10 | 5974 days | 23% |
| Ian S | 9/10 | 5975 days | 23% |
| Miguel | 9/10 | 5976 days | 23% |
| Thamar | 8/10 | 5990 days | 23% |
| Andie | 10/10 | 5998 days | 23% |
| Miranda | 8/10 | 6002 days | 23% |
| Miha | 10/10 | 6030 days | 23% |
| Gerits | 10/10 | 6038 days | 23% |
| Sluijs | 10/10 | 6043 days | 23% |
| olland | 10/10 | 6046 days | 23% |
| Liz | 10/10 | 6065 days | 23% |
| Stefan | 9/10 | 6090 days | 23% |
| Cory Fusco | 8/10 | 6150 days | 23% |
| Katie Wise | 10/10 | 6158 days | 23% |
| Heckter | 7/10 | 6297 days | 21% |
| Jennifer Baulch | 9/10 | 6302 days | 23% |
| Nancy Dol | 7/10 | 6323 days | 21% |
| David Buckley | 9/10 | 6326 days | 23% |
| Jenny Hulsebosch | 9/10 | 6354 days | 23% |
| Peter | 10/10 | 6395 days | 23% |
| bart | 6/10 | 6400 days | 18% |
| Miriam&Eva | 5/10 | 6616 days | 14% |
| Dennis | 8/10 | 6673 days | 23% |
| Arjan | 7/10 | 6687 days | 21% |
| Meyer | 9/10 | 6689 days | 23% |
| Lucy | 8/10 | 6691 days | 23% |
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
-2.13% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 119 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 | -2.10% |
| 198 | -2.11% |
| 199 | -2.12% |
| 200 | -2.13% |
| 201 | -2.14% |
| 202 | -2.15% |
| 203 | -2.16% |
| … | … |
Balancing Adjustment
2.62% 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
84%
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.