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
83.44%
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 | 2378 days | 61% |
| Rado Hank | 8/10 | 2707 days | 100% |
| Matthias and Adriane | 9/10 | 2962 days | 83% |
| Laure and Pascal | 9/10 | 2975 days | 82% |
| Thomas Klinting | 10/10 | 3001 days | 81% |
| Helna Saumanova | 9/10 | 3006 days | 80% |
| Danny | 7/10 | 3058 days | 71% |
| Marine Lavie | 8/10 | 3320 days | 57% |
| Cate Ronke | 8/10 | 3323 days | 57% |
| Stephan Friedrich | 9/10 | 3339 days | 57% |
| Stula Vladimir | 10/10 | 3357 days | 56% |
| Isabelle | 10/10 | 3360 days | 56% |
| Mikkel Palleson | 7/10 | 3363 days | 51% |
| Meilin | 5/10 | 3369 days | 38% |
| Sebastian and Susanna | 7/10 | 3408 days | 48% |
| Jakob Gerber | 7/10 | 3413 days | 47% |
| Marie Weber | 9/10 | 3722 days | 30% |
| Erik Hafuer | 4/10 | 3756 days | 12% |
| Caroline Jonsson | 7/10 | 4021 days | 7% |
| Jonny Ronnblom | 7/10 | 4021 days | 7% |
| Catherine Schlachter | 9/10 | 4028 days | 8% |
| Christina Perez | 8/10 | 4028 days | 8% |
| Bea Westkam | 10/10 | 4037 days | 8% |
| Julia Moellers | 8/10 | 4037 days | 7% |
| Anne Haenchen | 8/10 | 4053 days | 6% |
| Kathi | 8/10 | 4053 days | 6% |
| Sophia | 7/10 | 4070 days | 4% |
| Lukas | 6/10 | 4079 days | 2% |
| Celine Darde | 8/10 | 4093 days | 3% |
| Ludovic Denee | 8/10 | 4093 days | 3% |
| Melanie Pretzel | 8/10 | 4420 days | 19% |
| Frederic Birke | 8/10 | 4420 days | 19% |
| Andre and Marina | 2/10 | 4451 days | 0% |
| Hanneke P | 7/10 | 4477 days | 17% |
| Joroen Borkert | 9/10 | 4495 days | 19% |
| Roux | 8/10 | 4498 days | 19% |
| Leo | 9/10 | 4512 days | 19% |
| Lutz Huuemorder | 8/10 | 4514 days | 19% |
| Henzen | 8/10 | 4517 days | 19% |
| Tuedi Muggli | 10/10 | 4780 days | 20% |
| Romla | 8/10 | 4790 days | 19% |
| Ronald Veldman | 8/10 | 4790 days | 19% |
| Richard | 8/10 | 4793 days | 19% |
| Marie Dutron | 6/10 | 4793 days | 15% |
| Carl & Desiree Potter | 9/10 | 4795 days | 19% |
| Frans | 10/10 | 4795 days | 20% |
| Preben vil Helmsen | 10/10 | 4795 days | 20% |
| Johann Maier | 10/10 | 4796 days | 20% |
| Gillian MacLaren | 8/10 | 4797 days | 19% |
| Eline Vakentijn | 8/10 | 4797 days | 19% |
| Langerak | 9/10 | 4799 days | 19% |
| Magda Savels | 8/10 | 4805 days | 19% |
| Roger ter Horst | 9/10 | 4807 days | 19% |
| Maria Dietrich | 9/10 | 4807 days | 19% |
| Samplonius | 8/10 | 4807 days | 19% |
| Manuela Zimmerti | 9/10 | 4875 days | 19% |
| Dirk Faupel | 9/10 | 4878 days | 19% |
| Dirk Faupel | 9/10 | 4878 days | 19% |
| Robert Carswell | 7/10 | 4880 days | 17% |
| Marc & Pauline | 8/10 | 4880 days | 19% |
| Gerard Crothers | 10/10 | 4881 days | 20% |
| Steve Eley | 7/10 | 4883 days | 17% |
| van Rees | 8/10 | 4883 days | 19% |
| Ron & Hannah de Reuver | 9/10 | 4888 days | 19% |
| Wolfgang Goggel | 9/10 | 4888 days | 19% |
| Gary A | 7/10 | 4904 days | 17% |
| Tina | 9/10 | 4904 days | 19% |
| Jon_and_Family | 8/10 | 5118 days | 19% |
| Franzi & Tobi | 9/10 | 5129 days | 19% |
| Oliver Berg | 7/10 | 5132 days | 17% |
| Marianne Wheatley | 10/10 | 5137 days | 20% |
| Krabbe | 8/10 | 5140 days | 19% |
| Rolf | 4/10 | 5140 days | 7% |
| Malcolm Jones | 8/10 | 5142 days | 19% |
| Berger | 8/10 | 5153 days | 19% |
| Pieter | 9/10 | 5154 days | 19% |
| mr Schumader | 9/10 | 5163 days | 19% |
| Tamlin Barton | 6/10 | 5164 days | 15% |
| Tim Van Nispen | 8/10 | 5165 days | 19% |
| Johanna | 6/10 | 5166 days | 15% |
| Eva Stauderova | 10/10 | 5168 days | 20% |
| Patrick Decoster | 9/10 | 5170 days | 19% |
| Liz Dolman | 8/10 | 5172 days | 19% |
| Kay and Colin Yendole | 9/10 | 5173 days | 19% |
| Chamton | 6/10 | 5177 days | 15% |
| willsworthy | 9/10 | 5269 days | 19% |
| allesca | 8/10 | 5300 days | 19% |
| Bergemann | 8/10 | 5500 days | 19% |
| Silke Seemann | 9/10 | 5505 days | 19% |
| John Harrison | 8/10 | 5521 days | 19% |
| Tanja Haring | 9/10 | 5527 days | 19% |
| Amanda Hoff | 10/10 | 5542 days | 20% |
| Beute Jacob | 8/10 | 5555 days | 19% |
| Alies van der plank | 8/10 | 5559 days | 19% |
| mariekef | 10/10 | 5588 days | 20% |
| sanneb1 | 8/10 | 5589 days | 19% |
| keane | 7/10 | 5589 days | 17% |
| mariak | 8/10 | 5590 days | 19% |
| usigmund | 8/10 | 5593 days | 19% |
| hofstetterf | 10/10 | 5602 days | 20% |
| Stefan Lua | 10/10 | 5606 days | 20% |
| Peter Essink | 9/10 | 5606 days | 19% |
| Wolfgang Mages | 10/10 | 5608 days | 20% |
| Ann S | 10/10 | 5612 days | 20% |
| Roeder Grit | 8/10 | 5615 days | 19% |
| ulrichk | 10/10 | 5721 days | 20% |
| gerrys | 7/10 | 5803 days | 17% |
| RolandV | 10/10 | 5832 days | 20% |
| GemmaC | 8/10 | 5837 days | 19% |
| CeesVanW | 8/10 | 5845 days | 19% |
| LaurensD | 7/10 | 5848 days | 17% |
| StefanieA | 10/10 | 5850 days | 20% |
| Hendrik Flier | 7/10 | 5854 days | 17% |
| PBouwmessten | 9/10 | 5868 days | 19% |
| MauzcoV | 9/10 | 5868 days | 19% |
| marcusr | 9/10 | 5890 days | 19% |
| Eugene | 10/10 | 5890 days | 20% |
| Tony | 10/10 | 5896 days | 20% |
| Ian S | 9/10 | 5898 days | 19% |
| Miguel | 9/10 | 5899 days | 19% |
| Thamar | 8/10 | 5913 days | 19% |
| Andie | 10/10 | 5920 days | 20% |
| Miranda | 8/10 | 5925 days | 19% |
| Miha | 10/10 | 5953 days | 20% |
| Gerits | 10/10 | 5961 days | 20% |
| Sluijs | 10/10 | 5965 days | 20% |
| olland | 10/10 | 5969 days | 20% |
| Liz | 10/10 | 5988 days | 20% |
| Stefan | 9/10 | 6012 days | 19% |
| Cory Fusco | 8/10 | 6073 days | 19% |
| Katie Wise | 10/10 | 6081 days | 20% |
| Heckter | 7/10 | 6219 days | 17% |
| Jennifer Baulch | 9/10 | 6224 days | 19% |
| Nancy Dol | 7/10 | 6245 days | 17% |
| David Buckley | 9/10 | 6248 days | 19% |
| Jenny Hulsebosch | 9/10 | 6276 days | 19% |
| Peter | 10/10 | 6317 days | 20% |
| bart | 6/10 | 6322 days | 15% |
| Miriam&Eva | 5/10 | 6538 days | 11% |
| Dennis | 8/10 | 6595 days | 19% |
| Arjan | 7/10 | 6609 days | 17% |
| Meyer | 9/10 | 6611 days | 19% |
| Lucy | 8/10 | 6613 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
-3.66% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 61 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 | -3.61% |
| 198 | -3.63% |
| 199 | -3.65% |
| 200 | -3.66% |
| 201 | -3.68% |
| 202 | -3.70% |
| 203 | -3.72% |
| … | … |
Balancing Adjustment
3.06% 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.