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
83.66%
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 | 2698 days | 69% |
| Rado Hank | 8/10 | 3027 days | 100% |
| Matthias and Adriane | 9/10 | 3282 days | 82% |
| Laure and Pascal | 9/10 | 3295 days | 81% |
| Thomas Klinting | 10/10 | 3321 days | 80% |
| Helna Saumanova | 9/10 | 3326 days | 79% |
| Danny | 7/10 | 3378 days | 70% |
| Marine Lavie | 8/10 | 3640 days | 54% |
| Cate Ronke | 8/10 | 3643 days | 54% |
| Stephan Friedrich | 9/10 | 3659 days | 54% |
| Stula Vladimir | 10/10 | 3677 days | 53% |
| Isabelle | 10/10 | 3680 days | 53% |
| Mikkel Palleson | 7/10 | 3683 days | 49% |
| Meilin | 5/10 | 3689 days | 39% |
| Sebastian and Susanna | 7/10 | 3728 days | 45% |
| Jakob Gerber | 7/10 | 3733 days | 45% |
| Marie Weber | 9/10 | 4042 days | 25% |
| Erik Hafuer | 4/10 | 4076 days | 15% |
| Caroline Jonsson | 7/10 | 4341 days | 2% |
| Jonny Ronnblom | 7/10 | 4341 days | 2% |
| Catherine Schlachter | 9/10 | 4348 days | 2% |
| Christina Perez | 8/10 | 4348 days | 2% |
| Bea Westkam | 10/10 | 4357 days | 1% |
| Julia Moellers | 8/10 | 4357 days | 1% |
| Anne Haenchen | 8/10 | 4373 days | 0% |
| Kathi | 8/10 | 4373 days | 0% |
| Sophia | 7/10 | 4390 days | 36% |
| Lukas | 6/10 | 4399 days | 33% |
| Celine Darde | 8/10 | 4413 days | 37% |
| Ludovic Denee | 8/10 | 4413 days | 37% |
| Melanie Pretzel | 8/10 | 4740 days | 37% |
| Frederic Birke | 8/10 | 4740 days | 37% |
| Andre and Marina | 2/10 | 4771 days | 17% |
| Hanneke P | 7/10 | 4797 days | 36% |
| Joroen Borkert | 9/10 | 4815 days | 38% |
| Roux | 8/10 | 4818 days | 37% |
| Leo | 9/10 | 4832 days | 38% |
| Lutz Huuemorder | 8/10 | 4834 days | 37% |
| Henzen | 8/10 | 4837 days | 37% |
| Tuedi Muggli | 10/10 | 5100 days | 38% |
| Romla | 8/10 | 5110 days | 37% |
| Ronald Veldman | 8/10 | 5110 days | 37% |
| Richard | 8/10 | 5113 days | 37% |
| Marie Dutron | 6/10 | 5113 days | 33% |
| Carl & Desiree Potter | 9/10 | 5115 days | 38% |
| Frans | 10/10 | 5115 days | 38% |
| Preben vil Helmsen | 10/10 | 5115 days | 38% |
| Johann Maier | 10/10 | 5116 days | 38% |
| Gillian MacLaren | 8/10 | 5117 days | 37% |
| Eline Vakentijn | 8/10 | 5117 days | 37% |
| Langerak | 9/10 | 5119 days | 38% |
| Magda Savels | 8/10 | 5125 days | 37% |
| Roger ter Horst | 9/10 | 5127 days | 38% |
| Maria Dietrich | 9/10 | 5127 days | 38% |
| Samplonius | 8/10 | 5127 days | 37% |
| Manuela Zimmerti | 9/10 | 5195 days | 38% |
| Dirk Faupel | 9/10 | 5198 days | 38% |
| Dirk Faupel | 9/10 | 5198 days | 38% |
| Robert Carswell | 7/10 | 5200 days | 36% |
| Marc & Pauline | 8/10 | 5200 days | 37% |
| Gerard Crothers | 10/10 | 5201 days | 38% |
| Steve Eley | 7/10 | 5203 days | 36% |
| van Rees | 8/10 | 5203 days | 37% |
| Ron & Hannah de Reuver | 9/10 | 5208 days | 38% |
| Wolfgang Goggel | 9/10 | 5208 days | 38% |
| Gary A | 7/10 | 5224 days | 36% |
| Tina | 9/10 | 5224 days | 38% |
| Jon_and_Family | 8/10 | 5438 days | 37% |
| Franzi & Tobi | 9/10 | 5449 days | 38% |
| Oliver Berg | 7/10 | 5452 days | 36% |
| Marianne Wheatley | 10/10 | 5457 days | 38% |
| Krabbe | 8/10 | 5460 days | 37% |
| Rolf | 4/10 | 5460 days | 25% |
| Malcolm Jones | 8/10 | 5462 days | 37% |
| Berger | 8/10 | 5473 days | 37% |
| Pieter | 9/10 | 5474 days | 38% |
| mr Schumader | 9/10 | 5483 days | 38% |
| Tamlin Barton | 6/10 | 5484 days | 33% |
| Tim Van Nispen | 8/10 | 5485 days | 37% |
| Johanna | 6/10 | 5486 days | 33% |
| Eva Stauderova | 10/10 | 5488 days | 38% |
| Patrick Decoster | 9/10 | 5490 days | 38% |
| Liz Dolman | 8/10 | 5492 days | 37% |
| Kay and Colin Yendole | 9/10 | 5493 days | 38% |
| Chamton | 6/10 | 5497 days | 33% |
| willsworthy | 9/10 | 5589 days | 38% |
| allesca | 8/10 | 5620 days | 37% |
| Bergemann | 8/10 | 5820 days | 37% |
| Silke Seemann | 9/10 | 5825 days | 38% |
| John Harrison | 8/10 | 5841 days | 37% |
| Tanja Haring | 9/10 | 5847 days | 38% |
| Amanda Hoff | 10/10 | 5862 days | 38% |
| Beute Jacob | 8/10 | 5875 days | 37% |
| Alies van der plank | 8/10 | 5879 days | 37% |
| mariekef | 10/10 | 5908 days | 38% |
| sanneb1 | 8/10 | 5909 days | 37% |
| keane | 7/10 | 5909 days | 36% |
| mariak | 8/10 | 5910 days | 37% |
| usigmund | 8/10 | 5913 days | 37% |
| hofstetterf | 10/10 | 5922 days | 38% |
| Stefan Lua | 10/10 | 5926 days | 38% |
| Peter Essink | 9/10 | 5926 days | 38% |
| Wolfgang Mages | 10/10 | 5928 days | 38% |
| Ann S | 10/10 | 5932 days | 38% |
| Roeder Grit | 8/10 | 5935 days | 37% |
| ulrichk | 10/10 | 6041 days | 38% |
| gerrys | 7/10 | 6123 days | 36% |
| RolandV | 10/10 | 6152 days | 38% |
| GemmaC | 8/10 | 6157 days | 37% |
| CeesVanW | 8/10 | 6165 days | 37% |
| LaurensD | 7/10 | 6168 days | 36% |
| StefanieA | 10/10 | 6170 days | 38% |
| Hendrik Flier | 7/10 | 6174 days | 36% |
| PBouwmessten | 9/10 | 6188 days | 38% |
| MauzcoV | 9/10 | 6188 days | 38% |
| marcusr | 9/10 | 6209 days | 38% |
| Eugene | 10/10 | 6209 days | 38% |
| Tony | 10/10 | 6216 days | 38% |
| Ian S | 9/10 | 6217 days | 38% |
| Miguel | 9/10 | 6218 days | 38% |
| Thamar | 8/10 | 6232 days | 37% |
| Andie | 10/10 | 6240 days | 38% |
| Miranda | 8/10 | 6244 days | 37% |
| Miha | 10/10 | 6272 days | 38% |
| Gerits | 10/10 | 6280 days | 38% |
| Sluijs | 10/10 | 6285 days | 38% |
| olland | 10/10 | 6288 days | 38% |
| Liz | 10/10 | 6307 days | 38% |
| Stefan | 9/10 | 6331 days | 38% |
| Cory Fusco | 8/10 | 6392 days | 37% |
| Katie Wise | 10/10 | 6400 days | 38% |
| Heckter | 7/10 | 6539 days | 36% |
| Jennifer Baulch | 9/10 | 6544 days | 38% |
| Nancy Dol | 7/10 | 6565 days | 36% |
| David Buckley | 9/10 | 6568 days | 38% |
| Jenny Hulsebosch | 9/10 | 6596 days | 38% |
| Peter | 10/10 | 6637 days | 38% |
| bart | 6/10 | 6642 days | 33% |
| Miriam&Eva | 5/10 | 6858 days | 29% |
| Dennis | 8/10 | 6915 days | 37% |
| Arjan | 7/10 | 6929 days | 36% |
| Meyer | 9/10 | 6931 days | 38% |
| Lucy | 8/10 | 6933 days | 37% |
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
-4.15% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 53 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 | -4.08% |
| 198 | -4.10% |
| 199 | -4.13% |
| 200 | -4.15% |
| 201 | -4.17% |
| 202 | -4.19% |
| 203 | -4.21% |
| … | … |
Balancing Adjustment
3.14% 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.