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
83.40%
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 | 2355 days | 61% |
| Rado Hank | 8/10 | 2684 days | 100% |
| Matthias and Adriane | 9/10 | 2939 days | 84% |
| Laure and Pascal | 9/10 | 2952 days | 83% |
| Thomas Klinting | 10/10 | 2978 days | 82% |
| Helna Saumanova | 9/10 | 2983 days | 80% |
| Danny | 7/10 | 3035 days | 71% |
| Marine Lavie | 8/10 | 3297 days | 58% |
| Cate Ronke | 8/10 | 3300 days | 58% |
| Stephan Friedrich | 9/10 | 3316 days | 57% |
| Stula Vladimir | 10/10 | 3334 days | 57% |
| Isabelle | 10/10 | 3337 days | 57% |
| Mikkel Palleson | 7/10 | 3340 days | 51% |
| Meilin | 5/10 | 3346 days | 39% |
| Sebastian and Susanna | 7/10 | 3385 days | 48% |
| Jakob Gerber | 7/10 | 3390 days | 48% |
| Marie Weber | 9/10 | 3699 days | 31% |
| Erik Hafuer | 4/10 | 3733 days | 13% |
| Caroline Jonsson | 7/10 | 3998 days | 9% |
| Jonny Ronnblom | 7/10 | 3998 days | 9% |
| Catherine Schlachter | 9/10 | 4005 days | 10% |
| Christina Perez | 8/10 | 4005 days | 9% |
| Bea Westkam | 10/10 | 4014 days | 9% |
| Julia Moellers | 8/10 | 4014 days | 9% |
| Anne Haenchen | 8/10 | 4030 days | 8% |
| Kathi | 8/10 | 4030 days | 8% |
| Sophia | 7/10 | 4047 days | 5% |
| Lukas | 6/10 | 4056 days | 3% |
| Celine Darde | 8/10 | 4070 days | 5% |
| Ludovic Denee | 8/10 | 4070 days | 5% |
| Melanie Pretzel | 8/10 | 4397 days | 19% |
| Frederic Birke | 8/10 | 4397 days | 19% |
| Andre and Marina | 2/10 | 4428 days | 0% |
| Hanneke P | 7/10 | 4454 days | 17% |
| Joroen Borkert | 9/10 | 4472 days | 19% |
| Roux | 8/10 | 4475 days | 19% |
| Leo | 9/10 | 4489 days | 19% |
| Lutz Huuemorder | 8/10 | 4491 days | 19% |
| Henzen | 8/10 | 4494 days | 19% |
| Tuedi Muggli | 10/10 | 4757 days | 19% |
| Romla | 8/10 | 4767 days | 19% |
| Ronald Veldman | 8/10 | 4767 days | 19% |
| Richard | 8/10 | 4770 days | 19% |
| Marie Dutron | 6/10 | 4770 days | 15% |
| Carl & Desiree Potter | 9/10 | 4772 days | 19% |
| Frans | 10/10 | 4772 days | 19% |
| Preben vil Helmsen | 10/10 | 4772 days | 19% |
| Johann Maier | 10/10 | 4773 days | 19% |
| Gillian MacLaren | 8/10 | 4774 days | 19% |
| Eline Vakentijn | 8/10 | 4774 days | 19% |
| Langerak | 9/10 | 4776 days | 19% |
| Magda Savels | 8/10 | 4782 days | 19% |
| Roger ter Horst | 9/10 | 4784 days | 19% |
| Maria Dietrich | 9/10 | 4784 days | 19% |
| Samplonius | 8/10 | 4784 days | 19% |
| Manuela Zimmerti | 9/10 | 4852 days | 19% |
| Dirk Faupel | 9/10 | 4855 days | 19% |
| Dirk Faupel | 9/10 | 4855 days | 19% |
| Robert Carswell | 7/10 | 4857 days | 17% |
| Marc & Pauline | 8/10 | 4857 days | 19% |
| Gerard Crothers | 10/10 | 4858 days | 19% |
| Steve Eley | 7/10 | 4860 days | 17% |
| van Rees | 8/10 | 4860 days | 19% |
| Ron & Hannah de Reuver | 9/10 | 4865 days | 19% |
| Wolfgang Goggel | 9/10 | 4865 days | 19% |
| Gary A | 7/10 | 4881 days | 17% |
| Tina | 9/10 | 4881 days | 19% |
| Jon_and_Family | 8/10 | 5095 days | 19% |
| Franzi & Tobi | 9/10 | 5106 days | 19% |
| Oliver Berg | 7/10 | 5109 days | 17% |
| Marianne Wheatley | 10/10 | 5114 days | 19% |
| Krabbe | 8/10 | 5117 days | 19% |
| Rolf | 4/10 | 5117 days | 7% |
| Malcolm Jones | 8/10 | 5119 days | 19% |
| Berger | 8/10 | 5130 days | 19% |
| Pieter | 9/10 | 5131 days | 19% |
| mr Schumader | 9/10 | 5140 days | 19% |
| Tamlin Barton | 6/10 | 5141 days | 15% |
| Tim Van Nispen | 8/10 | 5142 days | 19% |
| Johanna | 6/10 | 5143 days | 15% |
| Eva Stauderova | 10/10 | 5145 days | 19% |
| Patrick Decoster | 9/10 | 5147 days | 19% |
| Liz Dolman | 8/10 | 5149 days | 19% |
| Kay and Colin Yendole | 9/10 | 5150 days | 19% |
| Chamton | 6/10 | 5154 days | 15% |
| willsworthy | 9/10 | 5246 days | 19% |
| allesca | 8/10 | 5277 days | 19% |
| Bergemann | 8/10 | 5477 days | 19% |
| Silke Seemann | 9/10 | 5482 days | 19% |
| John Harrison | 8/10 | 5498 days | 19% |
| Tanja Haring | 9/10 | 5504 days | 19% |
| Amanda Hoff | 10/10 | 5519 days | 19% |
| Beute Jacob | 8/10 | 5532 days | 19% |
| Alies van der plank | 8/10 | 5536 days | 19% |
| mariekef | 10/10 | 5565 days | 19% |
| sanneb1 | 8/10 | 5566 days | 19% |
| keane | 7/10 | 5566 days | 17% |
| mariak | 8/10 | 5567 days | 19% |
| usigmund | 8/10 | 5570 days | 19% |
| hofstetterf | 10/10 | 5579 days | 19% |
| Stefan Lua | 10/10 | 5583 days | 19% |
| Peter Essink | 9/10 | 5583 days | 19% |
| Wolfgang Mages | 10/10 | 5585 days | 19% |
| Ann S | 10/10 | 5589 days | 19% |
| Roeder Grit | 8/10 | 5592 days | 19% |
| ulrichk | 10/10 | 5697 days | 19% |
| gerrys | 7/10 | 5779 days | 17% |
| RolandV | 10/10 | 5808 days | 19% |
| GemmaC | 8/10 | 5813 days | 19% |
| CeesVanW | 8/10 | 5822 days | 19% |
| LaurensD | 7/10 | 5825 days | 17% |
| StefanieA | 10/10 | 5827 days | 19% |
| Hendrik Flier | 7/10 | 5831 days | 17% |
| PBouwmessten | 9/10 | 5845 days | 19% |
| MauzcoV | 9/10 | 5845 days | 19% |
| marcusr | 9/10 | 5866 days | 19% |
| Eugene | 10/10 | 5866 days | 19% |
| Tony | 10/10 | 5873 days | 19% |
| Ian S | 9/10 | 5874 days | 19% |
| Miguel | 9/10 | 5875 days | 19% |
| Thamar | 8/10 | 5889 days | 19% |
| Andie | 10/10 | 5897 days | 19% |
| Miranda | 8/10 | 5901 days | 19% |
| Miha | 10/10 | 5929 days | 19% |
| Gerits | 10/10 | 5937 days | 19% |
| Sluijs | 10/10 | 5942 days | 19% |
| olland | 10/10 | 5945 days | 19% |
| Liz | 10/10 | 5964 days | 19% |
| Stefan | 9/10 | 5988 days | 19% |
| Cory Fusco | 8/10 | 6049 days | 19% |
| Katie Wise | 10/10 | 6057 days | 19% |
| Heckter | 7/10 | 6196 days | 17% |
| Jennifer Baulch | 9/10 | 6201 days | 19% |
| Nancy Dol | 7/10 | 6222 days | 17% |
| David Buckley | 9/10 | 6225 days | 19% |
| Jenny Hulsebosch | 9/10 | 6253 days | 19% |
| Peter | 10/10 | 6294 days | 19% |
| bart | 6/10 | 6299 days | 15% |
| Miriam&Eva | 5/10 | 6514 days | 11% |
| Dennis | 8/10 | 6572 days | 19% |
| Arjan | 7/10 | 6586 days | 17% |
| Meyer | 9/10 | 6588 days | 19% |
| Lucy | 8/10 | 6590 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
-4.01% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 57 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 | -3.95% |
| 198 | -3.97% |
| 199 | -3.99% |
| 200 | -4.01% |
| 201 | -4.03% |
| 202 | -4.05% |
| 203 | -4.07% |
| … | … |
Balancing Adjustment
3.17% 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.