G'day, 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
83.85%
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 | 2665 days | 68% |
| Rado Hank | 8/10 | 2994 days | 100% |
| Matthias and Adriane | 9/10 | 3249 days | 82% |
| Laure and Pascal | 9/10 | 3262 days | 81% |
| Thomas Klinting | 10/10 | 3288 days | 80% |
| Helna Saumanova | 9/10 | 3293 days | 79% |
| Danny | 7/10 | 3345 days | 71% |
| Marine Lavie | 8/10 | 3607 days | 55% |
| Cate Ronke | 8/10 | 3610 days | 55% |
| Stephan Friedrich | 9/10 | 3626 days | 55% |
| Stula Vladimir | 10/10 | 3644 days | 54% |
| Isabelle | 10/10 | 3647 days | 54% |
| Mikkel Palleson | 7/10 | 3650 days | 50% |
| Meilin | 5/10 | 3656 days | 40% |
| Sebastian and Susanna | 7/10 | 3695 days | 46% |
| Jakob Gerber | 7/10 | 3700 days | 46% |
| Marie Weber | 9/10 | 4009 days | 26% |
| Erik Hafuer | 4/10 | 4043 days | 15% |
| Caroline Jonsson | 7/10 | 4308 days | 4% |
| Jonny Ronnblom | 7/10 | 4308 days | 4% |
| Catherine Schlachter | 9/10 | 4315 days | 4% |
| Christina Perez | 8/10 | 4315 days | 4% |
| Bea Westkam | 10/10 | 4324 days | 3% |
| Julia Moellers | 8/10 | 4324 days | 3% |
| Anne Haenchen | 8/10 | 4340 days | 2% |
| Kathi | 8/10 | 4340 days | 2% |
| Sophia | 7/10 | 4357 days | 1% |
| Lukas | 6/10 | 4366 days | 0% |
| Celine Darde | 8/10 | 4380 days | 36% |
| Ludovic Denee | 8/10 | 4380 days | 36% |
| Melanie Pretzel | 8/10 | 4707 days | 36% |
| Frederic Birke | 8/10 | 4707 days | 36% |
| Andre and Marina | 2/10 | 4738 days | 16% |
| Hanneke P | 7/10 | 4764 days | 34% |
| Joroen Borkert | 9/10 | 4782 days | 37% |
| Roux | 8/10 | 4785 days | 36% |
| Leo | 9/10 | 4799 days | 37% |
| Lutz Huuemorder | 8/10 | 4801 days | 36% |
| Henzen | 8/10 | 4804 days | 36% |
| Tuedi Muggli | 10/10 | 5067 days | 37% |
| Romla | 8/10 | 5077 days | 36% |
| Ronald Veldman | 8/10 | 5077 days | 36% |
| Richard | 8/10 | 5080 days | 36% |
| Marie Dutron | 6/10 | 5080 days | 32% |
| Carl & Desiree Potter | 9/10 | 5082 days | 37% |
| Frans | 10/10 | 5082 days | 37% |
| Preben vil Helmsen | 10/10 | 5082 days | 37% |
| Johann Maier | 10/10 | 5083 days | 37% |
| Gillian MacLaren | 8/10 | 5084 days | 36% |
| Eline Vakentijn | 8/10 | 5084 days | 36% |
| Langerak | 9/10 | 5086 days | 37% |
| Magda Savels | 8/10 | 5092 days | 36% |
| Roger ter Horst | 9/10 | 5094 days | 37% |
| Maria Dietrich | 9/10 | 5094 days | 37% |
| Samplonius | 8/10 | 5094 days | 36% |
| Manuela Zimmerti | 9/10 | 5162 days | 37% |
| Dirk Faupel | 9/10 | 5165 days | 37% |
| Dirk Faupel | 9/10 | 5165 days | 37% |
| Robert Carswell | 7/10 | 5167 days | 34% |
| Marc & Pauline | 8/10 | 5167 days | 36% |
| Gerard Crothers | 10/10 | 5168 days | 37% |
| Steve Eley | 7/10 | 5170 days | 34% |
| van Rees | 8/10 | 5170 days | 36% |
| Ron & Hannah de Reuver | 9/10 | 5175 days | 37% |
| Wolfgang Goggel | 9/10 | 5175 days | 37% |
| Gary A | 7/10 | 5191 days | 34% |
| Tina | 9/10 | 5191 days | 37% |
| Jon_and_Family | 8/10 | 5405 days | 36% |
| Franzi & Tobi | 9/10 | 5416 days | 37% |
| Oliver Berg | 7/10 | 5419 days | 34% |
| Marianne Wheatley | 10/10 | 5424 days | 37% |
| Krabbe | 8/10 | 5427 days | 36% |
| Rolf | 4/10 | 5427 days | 24% |
| Malcolm Jones | 8/10 | 5429 days | 36% |
| Berger | 8/10 | 5440 days | 36% |
| Pieter | 9/10 | 5441 days | 37% |
| mr Schumader | 9/10 | 5450 days | 37% |
| Tamlin Barton | 6/10 | 5451 days | 32% |
| Tim Van Nispen | 8/10 | 5452 days | 36% |
| Johanna | 6/10 | 5453 days | 32% |
| Eva Stauderova | 10/10 | 5455 days | 37% |
| Patrick Decoster | 9/10 | 5457 days | 37% |
| Liz Dolman | 8/10 | 5459 days | 36% |
| Kay and Colin Yendole | 9/10 | 5460 days | 37% |
| Chamton | 6/10 | 5464 days | 32% |
| willsworthy | 9/10 | 5556 days | 37% |
| allesca | 8/10 | 5587 days | 36% |
| Bergemann | 8/10 | 5787 days | 36% |
| Silke Seemann | 9/10 | 5792 days | 37% |
| John Harrison | 8/10 | 5808 days | 36% |
| Tanja Haring | 9/10 | 5814 days | 37% |
| Amanda Hoff | 10/10 | 5829 days | 37% |
| Beute Jacob | 8/10 | 5842 days | 36% |
| Alies van der plank | 8/10 | 5846 days | 36% |
| mariekef | 10/10 | 5875 days | 37% |
| sanneb1 | 8/10 | 5876 days | 36% |
| keane | 7/10 | 5876 days | 34% |
| mariak | 8/10 | 5877 days | 36% |
| usigmund | 8/10 | 5880 days | 36% |
| hofstetterf | 10/10 | 5889 days | 37% |
| Stefan Lua | 10/10 | 5893 days | 37% |
| Peter Essink | 9/10 | 5893 days | 37% |
| Wolfgang Mages | 10/10 | 5895 days | 37% |
| Ann S | 10/10 | 5899 days | 37% |
| Roeder Grit | 8/10 | 5902 days | 36% |
| ulrichk | 10/10 | 6008 days | 37% |
| gerrys | 7/10 | 6090 days | 34% |
| RolandV | 10/10 | 6119 days | 37% |
| GemmaC | 8/10 | 6124 days | 36% |
| CeesVanW | 8/10 | 6132 days | 36% |
| LaurensD | 7/10 | 6135 days | 34% |
| StefanieA | 10/10 | 6137 days | 37% |
| Hendrik Flier | 7/10 | 6141 days | 34% |
| PBouwmessten | 9/10 | 6155 days | 37% |
| MauzcoV | 9/10 | 6155 days | 37% |
| marcusr | 9/10 | 6176 days | 37% |
| Eugene | 10/10 | 6176 days | 37% |
| Tony | 10/10 | 6183 days | 37% |
| Ian S | 9/10 | 6184 days | 37% |
| Miguel | 9/10 | 6185 days | 37% |
| Thamar | 8/10 | 6199 days | 36% |
| Andie | 10/10 | 6207 days | 37% |
| Miranda | 8/10 | 6211 days | 36% |
| Miha | 10/10 | 6239 days | 37% |
| Gerits | 10/10 | 6247 days | 37% |
| Sluijs | 10/10 | 6252 days | 37% |
| olland | 10/10 | 6255 days | 37% |
| Liz | 10/10 | 6274 days | 37% |
| Stefan | 9/10 | 6298 days | 37% |
| Cory Fusco | 8/10 | 6359 days | 36% |
| Katie Wise | 10/10 | 6367 days | 37% |
| Heckter | 7/10 | 6506 days | 34% |
| Jennifer Baulch | 9/10 | 6511 days | 37% |
| Nancy Dol | 7/10 | 6532 days | 34% |
| David Buckley | 9/10 | 6535 days | 37% |
| Jenny Hulsebosch | 9/10 | 6563 days | 37% |
| Peter | 10/10 | 6604 days | 37% |
| bart | 6/10 | 6609 days | 32% |
| Miriam&Eva | 5/10 | 6825 days | 28% |
| Dennis | 8/10 | 6882 days | 36% |
| Arjan | 7/10 | 6896 days | 34% |
| Meyer | 9/10 | 6898 days | 37% |
| Lucy | 8/10 | 6900 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
-4.09% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 46 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 | -4.03% |
| 198 | -4.05% |
| 199 | -4.07% |
| 200 | -4.09% |
| 201 | -4.11% |
| 202 | -4.13% |
| 203 | -4.15% |
| … | … |
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.