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
83.83%
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 | 2622 days | 67% |
| Rado Hank | 8/10 | 2951 days | 100% |
| Matthias and Adriane | 9/10 | 3206 days | 82% |
| Laure and Pascal | 9/10 | 3219 days | 82% |
| Thomas Klinting | 10/10 | 3245 days | 80% |
| Helna Saumanova | 9/10 | 3250 days | 79% |
| Danny | 7/10 | 3302 days | 71% |
| Marine Lavie | 8/10 | 3564 days | 56% |
| Cate Ronke | 8/10 | 3567 days | 56% |
| Stephan Friedrich | 9/10 | 3583 days | 55% |
| Stula Vladimir | 10/10 | 3601 days | 54% |
| Isabelle | 10/10 | 3604 days | 54% |
| Mikkel Palleson | 7/10 | 3607 days | 50% |
| Meilin | 5/10 | 3613 days | 40% |
| Sebastian and Susanna | 7/10 | 3652 days | 47% |
| Jakob Gerber | 7/10 | 3657 days | 46% |
| Marie Weber | 9/10 | 3966 days | 27% |
| Erik Hafuer | 4/10 | 4000 days | 15% |
| Caroline Jonsson | 7/10 | 4265 days | 5% |
| Jonny Ronnblom | 7/10 | 4265 days | 5% |
| Catherine Schlachter | 9/10 | 4272 days | 5% |
| Christina Perez | 8/10 | 4272 days | 5% |
| Bea Westkam | 10/10 | 4281 days | 4% |
| Julia Moellers | 8/10 | 4281 days | 4% |
| Anne Haenchen | 8/10 | 4297 days | 3% |
| Kathi | 8/10 | 4297 days | 3% |
| Sophia | 7/10 | 4314 days | 1% |
| Lukas | 6/10 | 4323 days | 1% |
| Celine Darde | 8/10 | 4337 days | 0% |
| Ludovic Denee | 8/10 | 4337 days | 0% |
| Melanie Pretzel | 8/10 | 4664 days | 34% |
| Frederic Birke | 8/10 | 4664 days | 34% |
| Andre and Marina | 2/10 | 4695 days | 14% |
| Hanneke P | 7/10 | 4721 days | 32% |
| Joroen Borkert | 9/10 | 4739 days | 34% |
| Roux | 8/10 | 4742 days | 34% |
| Leo | 9/10 | 4756 days | 34% |
| Lutz Huuemorder | 8/10 | 4758 days | 34% |
| Henzen | 8/10 | 4761 days | 34% |
| Tuedi Muggli | 10/10 | 5024 days | 35% |
| Romla | 8/10 | 5034 days | 34% |
| Ronald Veldman | 8/10 | 5034 days | 34% |
| Richard | 8/10 | 5037 days | 34% |
| Marie Dutron | 6/10 | 5037 days | 29% |
| Carl & Desiree Potter | 9/10 | 5039 days | 34% |
| Frans | 10/10 | 5039 days | 35% |
| Preben vil Helmsen | 10/10 | 5039 days | 35% |
| Johann Maier | 10/10 | 5040 days | 35% |
| Gillian MacLaren | 8/10 | 5041 days | 34% |
| Eline Vakentijn | 8/10 | 5041 days | 34% |
| Langerak | 9/10 | 5043 days | 34% |
| Magda Savels | 8/10 | 5049 days | 34% |
| Roger ter Horst | 9/10 | 5051 days | 34% |
| Maria Dietrich | 9/10 | 5051 days | 34% |
| Samplonius | 8/10 | 5051 days | 34% |
| Manuela Zimmerti | 9/10 | 5119 days | 34% |
| Dirk Faupel | 9/10 | 5122 days | 34% |
| Dirk Faupel | 9/10 | 5122 days | 34% |
| Robert Carswell | 7/10 | 5124 days | 32% |
| Marc & Pauline | 8/10 | 5124 days | 34% |
| Gerard Crothers | 10/10 | 5125 days | 35% |
| Steve Eley | 7/10 | 5127 days | 32% |
| van Rees | 8/10 | 5127 days | 34% |
| Ron & Hannah de Reuver | 9/10 | 5132 days | 34% |
| Wolfgang Goggel | 9/10 | 5132 days | 34% |
| Gary A | 7/10 | 5148 days | 32% |
| Tina | 9/10 | 5148 days | 34% |
| Jon_and_Family | 8/10 | 5362 days | 34% |
| Franzi & Tobi | 9/10 | 5373 days | 34% |
| Oliver Berg | 7/10 | 5376 days | 32% |
| Marianne Wheatley | 10/10 | 5381 days | 35% |
| Krabbe | 8/10 | 5384 days | 34% |
| Rolf | 4/10 | 5384 days | 21% |
| Malcolm Jones | 8/10 | 5386 days | 34% |
| Berger | 8/10 | 5397 days | 34% |
| Pieter | 9/10 | 5398 days | 34% |
| mr Schumader | 9/10 | 5407 days | 34% |
| Tamlin Barton | 6/10 | 5408 days | 29% |
| Tim Van Nispen | 8/10 | 5409 days | 34% |
| Johanna | 6/10 | 5410 days | 29% |
| Eva Stauderova | 10/10 | 5412 days | 35% |
| Patrick Decoster | 9/10 | 5414 days | 34% |
| Liz Dolman | 8/10 | 5416 days | 34% |
| Kay and Colin Yendole | 9/10 | 5417 days | 34% |
| Chamton | 6/10 | 5421 days | 29% |
| willsworthy | 9/10 | 5513 days | 34% |
| allesca | 8/10 | 5544 days | 34% |
| Bergemann | 8/10 | 5744 days | 34% |
| Silke Seemann | 9/10 | 5749 days | 34% |
| John Harrison | 8/10 | 5765 days | 34% |
| Tanja Haring | 9/10 | 5771 days | 34% |
| Amanda Hoff | 10/10 | 5786 days | 35% |
| Beute Jacob | 8/10 | 5799 days | 34% |
| Alies van der plank | 8/10 | 5803 days | 34% |
| mariekef | 10/10 | 5832 days | 35% |
| sanneb1 | 8/10 | 5833 days | 34% |
| keane | 7/10 | 5833 days | 32% |
| mariak | 8/10 | 5834 days | 34% |
| usigmund | 8/10 | 5837 days | 34% |
| hofstetterf | 10/10 | 5846 days | 35% |
| Stefan Lua | 10/10 | 5850 days | 35% |
| Peter Essink | 9/10 | 5850 days | 34% |
| Wolfgang Mages | 10/10 | 5852 days | 35% |
| Ann S | 10/10 | 5856 days | 35% |
| Roeder Grit | 8/10 | 5859 days | 34% |
| ulrichk | 10/10 | 5965 days | 35% |
| gerrys | 7/10 | 6047 days | 32% |
| RolandV | 10/10 | 6076 days | 35% |
| GemmaC | 8/10 | 6081 days | 34% |
| CeesVanW | 8/10 | 6089 days | 34% |
| LaurensD | 7/10 | 6092 days | 32% |
| StefanieA | 10/10 | 6094 days | 35% |
| Hendrik Flier | 7/10 | 6098 days | 32% |
| PBouwmessten | 9/10 | 6112 days | 34% |
| MauzcoV | 9/10 | 6112 days | 34% |
| marcusr | 9/10 | 6133 days | 34% |
| Eugene | 10/10 | 6134 days | 35% |
| Tony | 10/10 | 6140 days | 35% |
| Ian S | 9/10 | 6141 days | 34% |
| Miguel | 9/10 | 6143 days | 34% |
| Thamar | 8/10 | 6157 days | 34% |
| Andie | 10/10 | 6164 days | 35% |
| Miranda | 8/10 | 6169 days | 34% |
| Miha | 10/10 | 6197 days | 35% |
| Gerits | 10/10 | 6205 days | 35% |
| Sluijs | 10/10 | 6209 days | 35% |
| olland | 10/10 | 6213 days | 35% |
| Liz | 10/10 | 6232 days | 35% |
| Stefan | 9/10 | 6256 days | 34% |
| Cory Fusco | 8/10 | 6316 days | 34% |
| Katie Wise | 10/10 | 6325 days | 35% |
| Heckter | 7/10 | 6463 days | 32% |
| Jennifer Baulch | 9/10 | 6468 days | 34% |
| Nancy Dol | 7/10 | 6489 days | 32% |
| David Buckley | 9/10 | 6492 days | 34% |
| Jenny Hulsebosch | 9/10 | 6520 days | 34% |
| Peter | 10/10 | 6561 days | 35% |
| bart | 6/10 | 6566 days | 29% |
| Miriam&Eva | 5/10 | 6782 days | 26% |
| Dennis | 8/10 | 6839 days | 34% |
| Arjan | 7/10 | 6853 days | 32% |
| Meyer | 9/10 | 6855 days | 34% |
| Lucy | 8/10 | 6857 days | 34% |
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
-4.07% 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
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.