G'day, 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
83.37%
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 | 2180 days | 64% |
| Rado Hank | 8/10 | 2509 days | 100% |
| Matthias and Adriane | 9/10 | 2764 days | 87% |
| Laure and Pascal | 9/10 | 2777 days | 86% |
| Thomas Klinting | 10/10 | 2803 days | 86% |
| Helna Saumanova | 9/10 | 2808 days | 84% |
| Danny | 7/10 | 2860 days | 76% |
| Marine Lavie | 8/10 | 3122 days | 66% |
| Cate Ronke | 8/10 | 3125 days | 66% |
| Stephan Friedrich | 9/10 | 3141 days | 66% |
| Stula Vladimir | 10/10 | 3159 days | 65% |
| Isabelle | 10/10 | 3162 days | 65% |
| Mikkel Palleson | 7/10 | 3165 days | 60% |
| Meilin | 5/10 | 3171 days | 49% |
| Sebastian and Susanna | 7/10 | 3210 days | 58% |
| Jakob Gerber | 7/10 | 3215 days | 58% |
| Marie Weber | 9/10 | 3524 days | 44% |
| Erik Hafuer | 4/10 | 3558 days | 27% |
| Caroline Jonsson | 7/10 | 3823 days | 26% |
| Jonny Ronnblom | 7/10 | 3823 days | 26% |
| Catherine Schlachter | 9/10 | 3830 days | 27% |
| Christina Perez | 8/10 | 3830 days | 27% |
| Bea Westkam | 10/10 | 3839 days | 27% |
| Julia Moellers | 8/10 | 3839 days | 27% |
| Anne Haenchen | 8/10 | 3855 days | 26% |
| Kathi | 8/10 | 3855 days | 26% |
| Sophia | 7/10 | 3872 days | 23% |
| Lukas | 6/10 | 3881 days | 21% |
| Celine Darde | 8/10 | 3895 days | 24% |
| Ludovic Denee | 8/10 | 3895 days | 24% |
| Melanie Pretzel | 8/10 | 4222 days | 5% |
| Frederic Birke | 8/10 | 4222 days | 5% |
| Andre and Marina | 2/10 | 4253 days | 0% |
| Hanneke P | 7/10 | 4279 days | 2% |
| Joroen Borkert | 9/10 | 4297 days | 1% |
| Roux | 8/10 | 4300 days | 1% |
| Leo | 9/10 | 4314 days | 0% |
| Lutz Huuemorder | 8/10 | 4316 days | 0% |
| Henzen | 8/10 | 4319 days | 0% |
| Tuedi Muggli | 10/10 | 4582 days | 26% |
| Romla | 8/10 | 4592 days | 25% |
| Ronald Veldman | 8/10 | 4592 days | 25% |
| Richard | 8/10 | 4595 days | 25% |
| Marie Dutron | 6/10 | 4595 days | 22% |
| Carl & Desiree Potter | 9/10 | 4597 days | 25% |
| Frans | 10/10 | 4597 days | 26% |
| Preben vil Helmsen | 10/10 | 4597 days | 26% |
| Johann Maier | 10/10 | 4598 days | 26% |
| Gillian MacLaren | 8/10 | 4599 days | 25% |
| Eline Vakentijn | 8/10 | 4599 days | 25% |
| Langerak | 9/10 | 4601 days | 25% |
| Magda Savels | 8/10 | 4607 days | 25% |
| Roger ter Horst | 9/10 | 4609 days | 25% |
| Maria Dietrich | 9/10 | 4609 days | 25% |
| Samplonius | 8/10 | 4609 days | 25% |
| Manuela Zimmerti | 9/10 | 4677 days | 25% |
| Dirk Faupel | 9/10 | 4680 days | 25% |
| Dirk Faupel | 9/10 | 4680 days | 25% |
| Robert Carswell | 7/10 | 4682 days | 24% |
| Marc & Pauline | 8/10 | 4682 days | 25% |
| Gerard Crothers | 10/10 | 4683 days | 26% |
| Steve Eley | 7/10 | 4685 days | 24% |
| van Rees | 8/10 | 4685 days | 25% |
| Ron & Hannah de Reuver | 9/10 | 4690 days | 25% |
| Wolfgang Goggel | 9/10 | 4690 days | 25% |
| Gary A | 7/10 | 4706 days | 24% |
| Tina | 9/10 | 4706 days | 25% |
| Jon_and_Family | 8/10 | 4920 days | 25% |
| Franzi & Tobi | 9/10 | 4931 days | 25% |
| Oliver Berg | 7/10 | 4934 days | 24% |
| Marianne Wheatley | 10/10 | 4939 days | 26% |
| Krabbe | 8/10 | 4942 days | 25% |
| Rolf | 4/10 | 4942 days | 16% |
| Malcolm Jones | 8/10 | 4944 days | 25% |
| Berger | 8/10 | 4955 days | 25% |
| Pieter | 9/10 | 4956 days | 25% |
| mr Schumader | 9/10 | 4965 days | 25% |
| Tamlin Barton | 6/10 | 4966 days | 22% |
| Tim Van Nispen | 8/10 | 4967 days | 25% |
| Johanna | 6/10 | 4968 days | 22% |
| Eva Stauderova | 10/10 | 4970 days | 26% |
| Patrick Decoster | 9/10 | 4972 days | 25% |
| Liz Dolman | 8/10 | 4974 days | 25% |
| Kay and Colin Yendole | 9/10 | 4975 days | 25% |
| Chamton | 6/10 | 4979 days | 22% |
| willsworthy | 9/10 | 5071 days | 25% |
| allesca | 8/10 | 5102 days | 25% |
| Bergemann | 8/10 | 5302 days | 25% |
| Silke Seemann | 9/10 | 5307 days | 25% |
| John Harrison | 8/10 | 5323 days | 25% |
| Tanja Haring | 9/10 | 5329 days | 25% |
| Amanda Hoff | 10/10 | 5344 days | 26% |
| Beute Jacob | 8/10 | 5357 days | 25% |
| Alies van der plank | 8/10 | 5361 days | 25% |
| mariekef | 10/10 | 5390 days | 26% |
| sanneb1 | 8/10 | 5391 days | 25% |
| keane | 7/10 | 5391 days | 24% |
| mariak | 8/10 | 5392 days | 25% |
| usigmund | 8/10 | 5395 days | 25% |
| hofstetterf | 10/10 | 5404 days | 26% |
| Stefan Lua | 10/10 | 5408 days | 26% |
| Peter Essink | 9/10 | 5408 days | 25% |
| Wolfgang Mages | 10/10 | 5410 days | 26% |
| Ann S | 10/10 | 5414 days | 26% |
| Roeder Grit | 8/10 | 5417 days | 25% |
| ulrichk | 10/10 | 5523 days | 26% |
| gerrys | 7/10 | 5605 days | 24% |
| RolandV | 10/10 | 5634 days | 26% |
| GemmaC | 8/10 | 5639 days | 25% |
| CeesVanW | 8/10 | 5647 days | 25% |
| LaurensD | 7/10 | 5650 days | 24% |
| StefanieA | 10/10 | 5652 days | 26% |
| Hendrik Flier | 7/10 | 5656 days | 24% |
| PBouwmessten | 9/10 | 5670 days | 25% |
| MauzcoV | 9/10 | 5670 days | 25% |
| marcusr | 9/10 | 5691 days | 25% |
| Eugene | 10/10 | 5691 days | 26% |
| Tony | 10/10 | 5698 days | 26% |
| Ian S | 9/10 | 5699 days | 25% |
| Miguel | 9/10 | 5701 days | 25% |
| Thamar | 8/10 | 5714 days | 25% |
| Andie | 10/10 | 5722 days | 26% |
| Miranda | 8/10 | 5726 days | 25% |
| Miha | 10/10 | 5755 days | 26% |
| Gerits | 10/10 | 5763 days | 26% |
| Sluijs | 10/10 | 5767 days | 26% |
| olland | 10/10 | 5770 days | 26% |
| Liz | 10/10 | 5789 days | 26% |
| Stefan | 9/10 | 5814 days | 25% |
| Cory Fusco | 8/10 | 5874 days | 25% |
| Katie Wise | 10/10 | 5882 days | 26% |
| Heckter | 7/10 | 6021 days | 24% |
| Jennifer Baulch | 9/10 | 6026 days | 25% |
| Nancy Dol | 7/10 | 6047 days | 24% |
| David Buckley | 9/10 | 6050 days | 25% |
| Jenny Hulsebosch | 9/10 | 6078 days | 25% |
| Peter | 10/10 | 6119 days | 26% |
| bart | 6/10 | 6124 days | 22% |
| Miriam&Eva | 5/10 | 6340 days | 19% |
| Dennis | 8/10 | 6397 days | 25% |
| Arjan | 7/10 | 6411 days | 24% |
| Meyer | 9/10 | 6413 days | 25% |
| Lucy | 8/10 | 6415 days | 25% |
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
-3.03% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 75 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 | -2.98% |
| 198 | -3.00% |
| 199 | -3.01% |
| 200 | -3.03% |
| 201 | -3.04% |
| 202 | -3.06% |
| 203 | -3.07% |
| … | … |
Balancing Adjustment
2.91% 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.