Hi, 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 | 2635 days | 68% |
| Rado Hank | 8/10 | 2964 days | 100% |
| Matthias and Adriane | 9/10 | 3219 days | 82% |
| Laure and Pascal | 9/10 | 3232 days | 82% |
| Thomas Klinting | 10/10 | 3258 days | 80% |
| Helna Saumanova | 9/10 | 3263 days | 79% |
| Danny | 7/10 | 3315 days | 71% |
| Marine Lavie | 8/10 | 3577 days | 56% |
| Cate Ronke | 8/10 | 3580 days | 56% |
| Stephan Friedrich | 9/10 | 3596 days | 55% |
| Stula Vladimir | 10/10 | 3614 days | 54% |
| Isabelle | 10/10 | 3617 days | 54% |
| Mikkel Palleson | 7/10 | 3620 days | 50% |
| Meilin | 5/10 | 3626 days | 40% |
| Sebastian and Susanna | 7/10 | 3665 days | 47% |
| Jakob Gerber | 7/10 | 3670 days | 46% |
| Marie Weber | 9/10 | 3979 days | 27% |
| Erik Hafuer | 4/10 | 4013 days | 15% |
| Caroline Jonsson | 7/10 | 4278 days | 5% |
| Jonny Ronnblom | 7/10 | 4278 days | 5% |
| Catherine Schlachter | 9/10 | 4285 days | 5% |
| Christina Perez | 8/10 | 4285 days | 5% |
| Bea Westkam | 10/10 | 4294 days | 4% |
| Julia Moellers | 8/10 | 4294 days | 4% |
| Anne Haenchen | 8/10 | 4310 days | 3% |
| Kathi | 8/10 | 4310 days | 3% |
| Sophia | 7/10 | 4327 days | 1% |
| Lukas | 6/10 | 4336 days | 1% |
| Celine Darde | 8/10 | 4350 days | 0% |
| Ludovic Denee | 8/10 | 4350 days | 0% |
| Melanie Pretzel | 8/10 | 4677 days | 35% |
| Frederic Birke | 8/10 | 4677 days | 35% |
| Andre and Marina | 2/10 | 4708 days | 15% |
| Hanneke P | 7/10 | 4734 days | 33% |
| Joroen Borkert | 9/10 | 4752 days | 35% |
| Roux | 8/10 | 4755 days | 35% |
| Leo | 9/10 | 4769 days | 35% |
| Lutz Huuemorder | 8/10 | 4771 days | 35% |
| Henzen | 8/10 | 4774 days | 35% |
| Tuedi Muggli | 10/10 | 5037 days | 35% |
| Romla | 8/10 | 5047 days | 35% |
| Ronald Veldman | 8/10 | 5047 days | 35% |
| Richard | 8/10 | 5050 days | 35% |
| Marie Dutron | 6/10 | 5050 days | 30% |
| Carl & Desiree Potter | 9/10 | 5052 days | 35% |
| Frans | 10/10 | 5052 days | 35% |
| Preben vil Helmsen | 10/10 | 5052 days | 35% |
| Johann Maier | 10/10 | 5053 days | 35% |
| Gillian MacLaren | 8/10 | 5054 days | 35% |
| Eline Vakentijn | 8/10 | 5054 days | 35% |
| Langerak | 9/10 | 5056 days | 35% |
| Magda Savels | 8/10 | 5062 days | 35% |
| Roger ter Horst | 9/10 | 5064 days | 35% |
| Maria Dietrich | 9/10 | 5064 days | 35% |
| Samplonius | 8/10 | 5064 days | 35% |
| Manuela Zimmerti | 9/10 | 5132 days | 35% |
| Dirk Faupel | 9/10 | 5135 days | 35% |
| Dirk Faupel | 9/10 | 5135 days | 35% |
| Robert Carswell | 7/10 | 5137 days | 33% |
| Marc & Pauline | 8/10 | 5137 days | 35% |
| Gerard Crothers | 10/10 | 5138 days | 35% |
| Steve Eley | 7/10 | 5140 days | 33% |
| van Rees | 8/10 | 5140 days | 35% |
| Ron & Hannah de Reuver | 9/10 | 5145 days | 35% |
| Wolfgang Goggel | 9/10 | 5145 days | 35% |
| Gary A | 7/10 | 5161 days | 33% |
| Tina | 9/10 | 5161 days | 35% |
| Jon_and_Family | 8/10 | 5375 days | 35% |
| Franzi & Tobi | 9/10 | 5386 days | 35% |
| Oliver Berg | 7/10 | 5389 days | 33% |
| Marianne Wheatley | 10/10 | 5394 days | 35% |
| Krabbe | 8/10 | 5397 days | 35% |
| Rolf | 4/10 | 5397 days | 22% |
| Malcolm Jones | 8/10 | 5399 days | 35% |
| Berger | 8/10 | 5410 days | 35% |
| Pieter | 9/10 | 5411 days | 35% |
| mr Schumader | 9/10 | 5420 days | 35% |
| Tamlin Barton | 6/10 | 5421 days | 30% |
| Tim Van Nispen | 8/10 | 5422 days | 35% |
| Johanna | 6/10 | 5423 days | 30% |
| Eva Stauderova | 10/10 | 5425 days | 35% |
| Patrick Decoster | 9/10 | 5427 days | 35% |
| Liz Dolman | 8/10 | 5429 days | 35% |
| Kay and Colin Yendole | 9/10 | 5430 days | 35% |
| Chamton | 6/10 | 5434 days | 30% |
| willsworthy | 9/10 | 5526 days | 35% |
| allesca | 8/10 | 5557 days | 35% |
| Bergemann | 8/10 | 5757 days | 35% |
| Silke Seemann | 9/10 | 5762 days | 35% |
| John Harrison | 8/10 | 5778 days | 35% |
| Tanja Haring | 9/10 | 5784 days | 35% |
| Amanda Hoff | 10/10 | 5799 days | 35% |
| Beute Jacob | 8/10 | 5812 days | 35% |
| Alies van der plank | 8/10 | 5816 days | 35% |
| mariekef | 10/10 | 5845 days | 35% |
| sanneb1 | 8/10 | 5846 days | 35% |
| keane | 7/10 | 5846 days | 33% |
| mariak | 8/10 | 5847 days | 35% |
| usigmund | 8/10 | 5850 days | 35% |
| hofstetterf | 10/10 | 5859 days | 35% |
| Stefan Lua | 10/10 | 5863 days | 35% |
| Peter Essink | 9/10 | 5863 days | 35% |
| Wolfgang Mages | 10/10 | 5865 days | 35% |
| Ann S | 10/10 | 5869 days | 35% |
| Roeder Grit | 8/10 | 5872 days | 35% |
| ulrichk | 10/10 | 5977 days | 35% |
| gerrys | 7/10 | 6059 days | 33% |
| RolandV | 10/10 | 6088 days | 35% |
| GemmaC | 8/10 | 6093 days | 35% |
| CeesVanW | 8/10 | 6102 days | 35% |
| LaurensD | 7/10 | 6105 days | 33% |
| StefanieA | 10/10 | 6107 days | 35% |
| Hendrik Flier | 7/10 | 6111 days | 33% |
| PBouwmessten | 9/10 | 6125 days | 35% |
| MauzcoV | 9/10 | 6125 days | 35% |
| marcusr | 9/10 | 6146 days | 35% |
| Eugene | 10/10 | 6146 days | 35% |
| Tony | 10/10 | 6153 days | 35% |
| Ian S | 9/10 | 6154 days | 35% |
| Miguel | 9/10 | 6155 days | 35% |
| Thamar | 8/10 | 6169 days | 35% |
| Andie | 10/10 | 6177 days | 35% |
| Miranda | 8/10 | 6181 days | 35% |
| Miha | 10/10 | 6209 days | 35% |
| Gerits | 10/10 | 6217 days | 35% |
| Sluijs | 10/10 | 6222 days | 35% |
| olland | 10/10 | 6225 days | 35% |
| Liz | 10/10 | 6244 days | 35% |
| Stefan | 9/10 | 6268 days | 35% |
| Cory Fusco | 8/10 | 6329 days | 35% |
| Katie Wise | 10/10 | 6337 days | 35% |
| Heckter | 7/10 | 6476 days | 33% |
| Jennifer Baulch | 9/10 | 6481 days | 35% |
| Nancy Dol | 7/10 | 6502 days | 33% |
| David Buckley | 9/10 | 6505 days | 35% |
| Jenny Hulsebosch | 9/10 | 6533 days | 35% |
| Peter | 10/10 | 6574 days | 35% |
| bart | 6/10 | 6579 days | 30% |
| Miriam&Eva | 5/10 | 6794 days | 27% |
| Dennis | 8/10 | 6852 days | 35% |
| Arjan | 7/10 | 6866 days | 33% |
| Meyer | 9/10 | 6868 days | 35% |
| Lucy | 8/10 | 6870 days | 35% |
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
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 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 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
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.