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
83.47%
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 | 2243 days | 66% |
| Rado Hank | 8/10 | 2572 days | 100% |
| Matthias and Adriane | 9/10 | 2827 days | 87% |
| Laure and Pascal | 9/10 | 2840 days | 86% |
| Thomas Klinting | 10/10 | 2866 days | 85% |
| Helna Saumanova | 9/10 | 2871 days | 84% |
| Danny | 7/10 | 2923 days | 77% |
| Marine Lavie | 8/10 | 3185 days | 66% |
| Cate Ronke | 8/10 | 3188 days | 66% |
| Stephan Friedrich | 9/10 | 3204 days | 66% |
| Stula Vladimir | 10/10 | 3222 days | 65% |
| Isabelle | 10/10 | 3225 days | 65% |
| Mikkel Palleson | 7/10 | 3228 days | 60% |
| Meilin | 5/10 | 3234 days | 49% |
| Sebastian and Susanna | 7/10 | 3273 days | 58% |
| Jakob Gerber | 7/10 | 3278 days | 58% |
| Marie Weber | 9/10 | 3587 days | 44% |
| Erik Hafuer | 4/10 | 3621 days | 28% |
| Caroline Jonsson | 7/10 | 3886 days | 26% |
| Jonny Ronnblom | 7/10 | 3886 days | 26% |
| Catherine Schlachter | 9/10 | 3893 days | 27% |
| Christina Perez | 8/10 | 3893 days | 27% |
| Bea Westkam | 10/10 | 3902 days | 27% |
| Julia Moellers | 8/10 | 3902 days | 26% |
| Anne Haenchen | 8/10 | 3918 days | 26% |
| Kathi | 8/10 | 3918 days | 26% |
| Sophia | 7/10 | 3935 days | 23% |
| Lukas | 6/10 | 3944 days | 21% |
| Celine Darde | 8/10 | 3958 days | 23% |
| Ludovic Denee | 8/10 | 3958 days | 23% |
| Melanie Pretzel | 8/10 | 4285 days | 5% |
| Frederic Birke | 8/10 | 4285 days | 5% |
| Andre and Marina | 2/10 | 4316 days | 2% |
| Hanneke P | 7/10 | 4342 days | 2% |
| Joroen Borkert | 9/10 | 4360 days | 1% |
| Roux | 8/10 | 4363 days | 1% |
| Leo | 9/10 | 4377 days | 0% |
| Lutz Huuemorder | 8/10 | 4379 days | 0% |
| Henzen | 8/10 | 4382 days | 28% |
| Tuedi Muggli | 10/10 | 4645 days | 29% |
| Romla | 8/10 | 4655 days | 28% |
| Ronald Veldman | 8/10 | 4655 days | 28% |
| Richard | 8/10 | 4658 days | 28% |
| Marie Dutron | 6/10 | 4658 days | 25% |
| Carl & Desiree Potter | 9/10 | 4660 days | 29% |
| Frans | 10/10 | 4660 days | 29% |
| Preben vil Helmsen | 10/10 | 4660 days | 29% |
| Johann Maier | 10/10 | 4661 days | 29% |
| Gillian MacLaren | 8/10 | 4662 days | 28% |
| Eline Vakentijn | 8/10 | 4662 days | 28% |
| Langerak | 9/10 | 4664 days | 29% |
| Magda Savels | 8/10 | 4670 days | 28% |
| Roger ter Horst | 9/10 | 4672 days | 29% |
| Maria Dietrich | 9/10 | 4672 days | 29% |
| Samplonius | 8/10 | 4672 days | 28% |
| Manuela Zimmerti | 9/10 | 4740 days | 29% |
| Dirk Faupel | 9/10 | 4743 days | 29% |
| Dirk Faupel | 9/10 | 4743 days | 29% |
| Robert Carswell | 7/10 | 4745 days | 27% |
| Marc & Pauline | 8/10 | 4745 days | 28% |
| Gerard Crothers | 10/10 | 4746 days | 29% |
| Steve Eley | 7/10 | 4748 days | 27% |
| van Rees | 8/10 | 4748 days | 28% |
| Ron & Hannah de Reuver | 9/10 | 4753 days | 29% |
| Wolfgang Goggel | 9/10 | 4753 days | 29% |
| Gary A | 7/10 | 4769 days | 27% |
| Tina | 9/10 | 4769 days | 29% |
| Jon_and_Family | 8/10 | 4983 days | 28% |
| Franzi & Tobi | 9/10 | 4994 days | 29% |
| Oliver Berg | 7/10 | 4997 days | 27% |
| Marianne Wheatley | 10/10 | 5002 days | 29% |
| Krabbe | 8/10 | 5005 days | 28% |
| Rolf | 4/10 | 5005 days | 19% |
| Malcolm Jones | 8/10 | 5007 days | 28% |
| Berger | 8/10 | 5018 days | 28% |
| Pieter | 9/10 | 5019 days | 29% |
| mr Schumader | 9/10 | 5028 days | 29% |
| Tamlin Barton | 6/10 | 5029 days | 25% |
| Tim Van Nispen | 8/10 | 5030 days | 28% |
| Johanna | 6/10 | 5031 days | 25% |
| Eva Stauderova | 10/10 | 5033 days | 29% |
| Patrick Decoster | 9/10 | 5035 days | 29% |
| Liz Dolman | 8/10 | 5037 days | 28% |
| Kay and Colin Yendole | 9/10 | 5038 days | 29% |
| Chamton | 6/10 | 5042 days | 25% |
| willsworthy | 9/10 | 5134 days | 29% |
| allesca | 8/10 | 5165 days | 28% |
| Bergemann | 8/10 | 5365 days | 28% |
| Silke Seemann | 9/10 | 5370 days | 29% |
| John Harrison | 8/10 | 5386 days | 28% |
| Tanja Haring | 9/10 | 5392 days | 29% |
| Amanda Hoff | 10/10 | 5407 days | 29% |
| Beute Jacob | 8/10 | 5420 days | 28% |
| Alies van der plank | 8/10 | 5424 days | 28% |
| mariekef | 10/10 | 5453 days | 29% |
| sanneb1 | 8/10 | 5454 days | 28% |
| keane | 7/10 | 5454 days | 27% |
| mariak | 8/10 | 5455 days | 28% |
| usigmund | 8/10 | 5458 days | 28% |
| hofstetterf | 10/10 | 5467 days | 29% |
| Stefan Lua | 10/10 | 5471 days | 29% |
| Peter Essink | 9/10 | 5471 days | 29% |
| Wolfgang Mages | 10/10 | 5473 days | 29% |
| Ann S | 10/10 | 5477 days | 29% |
| Roeder Grit | 8/10 | 5480 days | 28% |
| ulrichk | 10/10 | 5586 days | 29% |
| gerrys | 7/10 | 5668 days | 27% |
| RolandV | 10/10 | 5697 days | 29% |
| GemmaC | 8/10 | 5702 days | 28% |
| CeesVanW | 8/10 | 5710 days | 28% |
| LaurensD | 7/10 | 5713 days | 27% |
| StefanieA | 10/10 | 5715 days | 29% |
| Hendrik Flier | 7/10 | 5719 days | 27% |
| PBouwmessten | 9/10 | 5733 days | 29% |
| MauzcoV | 9/10 | 5733 days | 29% |
| marcusr | 9/10 | 5755 days | 29% |
| Eugene | 10/10 | 5755 days | 29% |
| Tony | 10/10 | 5762 days | 29% |
| Ian S | 9/10 | 5763 days | 29% |
| Miguel | 9/10 | 5764 days | 29% |
| Thamar | 8/10 | 5778 days | 28% |
| Andie | 10/10 | 5786 days | 29% |
| Miranda | 8/10 | 5790 days | 28% |
| Miha | 10/10 | 5818 days | 29% |
| Gerits | 10/10 | 5826 days | 29% |
| Sluijs | 10/10 | 5831 days | 29% |
| olland | 10/10 | 5834 days | 29% |
| Liz | 10/10 | 5853 days | 29% |
| Stefan | 9/10 | 5877 days | 29% |
| Cory Fusco | 8/10 | 5938 days | 28% |
| Katie Wise | 10/10 | 5946 days | 29% |
| Heckter | 7/10 | 6084 days | 27% |
| Jennifer Baulch | 9/10 | 6089 days | 29% |
| Nancy Dol | 7/10 | 6110 days | 27% |
| David Buckley | 9/10 | 6113 days | 29% |
| Jenny Hulsebosch | 9/10 | 6141 days | 29% |
| Peter | 10/10 | 6182 days | 29% |
| bart | 6/10 | 6187 days | 25% |
| Miriam&Eva | 5/10 | 6403 days | 22% |
| Dennis | 8/10 | 6460 days | 28% |
| Arjan | 7/10 | 6474 days | 27% |
| Meyer | 9/10 | 6476 days | 29% |
| Lucy | 8/10 | 6478 days | 28% |
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 43 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
3.16% 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.