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
83.39%
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 | 2314 days | 66% |
| Rado Hank | 8/10 | 2643 days | 100% |
| Matthias and Adriane | 9/10 | 2898 days | 86% |
| Laure and Pascal | 9/10 | 2911 days | 85% |
| Thomas Klinting | 10/10 | 2937 days | 85% |
| Helna Saumanova | 9/10 | 2942 days | 83% |
| Danny | 7/10 | 2994 days | 75% |
| Marine Lavie | 8/10 | 3256 days | 64% |
| Cate Ronke | 8/10 | 3259 days | 64% |
| Stephan Friedrich | 9/10 | 3275 days | 64% |
| Stula Vladimir | 10/10 | 3293 days | 63% |
| Isabelle | 10/10 | 3296 days | 63% |
| Mikkel Palleson | 7/10 | 3299 days | 59% |
| Meilin | 5/10 | 3305 days | 47% |
| Sebastian and Susanna | 7/10 | 3344 days | 56% |
| Jakob Gerber | 7/10 | 3349 days | 56% |
| Marie Weber | 9/10 | 3658 days | 41% |
| Erik Hafuer | 4/10 | 3692 days | 25% |
| Caroline Jonsson | 7/10 | 3957 days | 22% |
| Jonny Ronnblom | 7/10 | 3957 days | 22% |
| Catherine Schlachter | 9/10 | 3964 days | 23% |
| Christina Perez | 8/10 | 3964 days | 23% |
| Bea Westkam | 10/10 | 3973 days | 23% |
| Julia Moellers | 8/10 | 3973 days | 22% |
| Anne Haenchen | 8/10 | 3989 days | 21% |
| Kathi | 8/10 | 3989 days | 21% |
| Sophia | 7/10 | 4006 days | 19% |
| Lukas | 6/10 | 4015 days | 17% |
| Celine Darde | 8/10 | 4029 days | 19% |
| Ludovic Denee | 8/10 | 4029 days | 19% |
| Melanie Pretzel | 8/10 | 4356 days | 0% |
| Frederic Birke | 8/10 | 4356 days | 0% |
| Andre and Marina | 2/10 | 4387 days | 12% |
| Hanneke P | 7/10 | 4413 days | 27% |
| Joroen Borkert | 9/10 | 4431 days | 29% |
| Roux | 8/10 | 4434 days | 28% |
| Leo | 9/10 | 4448 days | 29% |
| Lutz Huuemorder | 8/10 | 4450 days | 28% |
| Henzen | 8/10 | 4453 days | 28% |
| Tuedi Muggli | 10/10 | 4716 days | 29% |
| Romla | 8/10 | 4726 days | 28% |
| Ronald Veldman | 8/10 | 4726 days | 28% |
| Richard | 8/10 | 4729 days | 28% |
| Marie Dutron | 6/10 | 4729 days | 25% |
| Carl & Desiree Potter | 9/10 | 4731 days | 29% |
| Frans | 10/10 | 4731 days | 29% |
| Preben vil Helmsen | 10/10 | 4731 days | 29% |
| Johann Maier | 10/10 | 4732 days | 29% |
| Gillian MacLaren | 8/10 | 4733 days | 28% |
| Eline Vakentijn | 8/10 | 4733 days | 28% |
| Langerak | 9/10 | 4735 days | 29% |
| Magda Savels | 8/10 | 4741 days | 28% |
| Roger ter Horst | 9/10 | 4743 days | 29% |
| Maria Dietrich | 9/10 | 4743 days | 29% |
| Samplonius | 8/10 | 4743 days | 28% |
| Manuela Zimmerti | 9/10 | 4811 days | 29% |
| Dirk Faupel | 9/10 | 4814 days | 29% |
| Dirk Faupel | 9/10 | 4814 days | 29% |
| Robert Carswell | 7/10 | 4816 days | 27% |
| Marc & Pauline | 8/10 | 4816 days | 28% |
| Gerard Crothers | 10/10 | 4817 days | 29% |
| Steve Eley | 7/10 | 4819 days | 27% |
| van Rees | 8/10 | 4819 days | 28% |
| Ron & Hannah de Reuver | 9/10 | 4824 days | 29% |
| Wolfgang Goggel | 9/10 | 4824 days | 29% |
| Gary A | 7/10 | 4840 days | 27% |
| Tina | 9/10 | 4840 days | 29% |
| Jon_and_Family | 8/10 | 5054 days | 28% |
| Franzi & Tobi | 9/10 | 5065 days | 29% |
| Oliver Berg | 7/10 | 5068 days | 27% |
| Marianne Wheatley | 10/10 | 5073 days | 29% |
| Krabbe | 8/10 | 5076 days | 28% |
| Rolf | 4/10 | 5076 days | 18% |
| Malcolm Jones | 8/10 | 5078 days | 28% |
| Berger | 8/10 | 5089 days | 28% |
| Pieter | 9/10 | 5090 days | 29% |
| mr Schumader | 9/10 | 5099 days | 29% |
| Tamlin Barton | 6/10 | 5100 days | 25% |
| Tim Van Nispen | 8/10 | 5101 days | 28% |
| Johanna | 6/10 | 5102 days | 25% |
| Eva Stauderova | 10/10 | 5104 days | 29% |
| Patrick Decoster | 9/10 | 5106 days | 29% |
| Liz Dolman | 8/10 | 5108 days | 28% |
| Kay and Colin Yendole | 9/10 | 5109 days | 29% |
| Chamton | 6/10 | 5113 days | 25% |
| willsworthy | 9/10 | 5205 days | 29% |
| allesca | 8/10 | 5236 days | 28% |
| Bergemann | 8/10 | 5436 days | 28% |
| Silke Seemann | 9/10 | 5441 days | 29% |
| John Harrison | 8/10 | 5457 days | 28% |
| Tanja Haring | 9/10 | 5463 days | 29% |
| Amanda Hoff | 10/10 | 5478 days | 29% |
| Beute Jacob | 8/10 | 5491 days | 28% |
| Alies van der plank | 8/10 | 5495 days | 28% |
| mariekef | 10/10 | 5524 days | 29% |
| sanneb1 | 8/10 | 5525 days | 28% |
| keane | 7/10 | 5525 days | 27% |
| mariak | 8/10 | 5526 days | 28% |
| usigmund | 8/10 | 5529 days | 28% |
| hofstetterf | 10/10 | 5538 days | 29% |
| Stefan Lua | 10/10 | 5542 days | 29% |
| Peter Essink | 9/10 | 5542 days | 29% |
| Wolfgang Mages | 10/10 | 5544 days | 29% |
| Ann S | 10/10 | 5548 days | 29% |
| Roeder Grit | 8/10 | 5551 days | 28% |
| ulrichk | 10/10 | 5657 days | 29% |
| gerrys | 7/10 | 5739 days | 27% |
| RolandV | 10/10 | 5768 days | 29% |
| GemmaC | 8/10 | 5773 days | 28% |
| CeesVanW | 8/10 | 5781 days | 28% |
| LaurensD | 7/10 | 5784 days | 27% |
| StefanieA | 10/10 | 5786 days | 29% |
| Hendrik Flier | 7/10 | 5790 days | 27% |
| PBouwmessten | 9/10 | 5804 days | 29% |
| MauzcoV | 9/10 | 5804 days | 29% |
| marcusr | 9/10 | 5825 days | 29% |
| Eugene | 10/10 | 5825 days | 29% |
| Tony | 10/10 | 5832 days | 29% |
| Ian S | 9/10 | 5833 days | 29% |
| Miguel | 9/10 | 5834 days | 29% |
| Thamar | 8/10 | 5848 days | 28% |
| Andie | 10/10 | 5856 days | 29% |
| Miranda | 8/10 | 5860 days | 28% |
| Miha | 10/10 | 5888 days | 29% |
| Gerits | 10/10 | 5896 days | 29% |
| Sluijs | 10/10 | 5901 days | 29% |
| olland | 10/10 | 5904 days | 29% |
| Liz | 10/10 | 5923 days | 29% |
| Stefan | 9/10 | 5947 days | 29% |
| Cory Fusco | 8/10 | 6008 days | 28% |
| Katie Wise | 10/10 | 6016 days | 29% |
| Heckter | 7/10 | 6155 days | 27% |
| Jennifer Baulch | 9/10 | 6160 days | 29% |
| Nancy Dol | 7/10 | 6181 days | 27% |
| David Buckley | 9/10 | 6184 days | 29% |
| Jenny Hulsebosch | 9/10 | 6212 days | 29% |
| Peter | 10/10 | 6253 days | 29% |
| bart | 6/10 | 6258 days | 25% |
| Miriam&Eva | 5/10 | 6474 days | 22% |
| Dennis | 8/10 | 6531 days | 28% |
| Arjan | 7/10 | 6545 days | 27% |
| Meyer | 9/10 | 6547 days | 29% |
| Lucy | 8/10 | 6549 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
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 49 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 | -4.08% |
| 198 | -4.10% |
| 199 | -4.12% |
| 200 | -4.14% |
| 201 | -4.16% |
| 202 | -4.18% |
| 203 | -4.20% |
| … | … |
Balancing Adjustment
3.21% 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
82%
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.