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
83.57%
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 | 2271 days | 66% |
| Rado Hank | 8/10 | 2600 days | 100% |
| Matthias and Adriane | 9/10 | 2855 days | 86% |
| Laure and Pascal | 9/10 | 2868 days | 86% |
| Thomas Klinting | 10/10 | 2894 days | 85% |
| Helna Saumanova | 9/10 | 2899 days | 84% |
| Danny | 7/10 | 2951 days | 76% |
| Marine Lavie | 8/10 | 3213 days | 65% |
| Cate Ronke | 8/10 | 3216 days | 65% |
| Stephan Friedrich | 9/10 | 3232 days | 65% |
| Stula Vladimir | 10/10 | 3250 days | 65% |
| Isabelle | 10/10 | 3253 days | 64% |
| Mikkel Palleson | 7/10 | 3256 days | 60% |
| Meilin | 5/10 | 3262 days | 49% |
| Sebastian and Susanna | 7/10 | 3301 days | 57% |
| Jakob Gerber | 7/10 | 3306 days | 57% |
| Marie Weber | 9/10 | 3615 days | 43% |
| Erik Hafuer | 4/10 | 3649 days | 27% |
| Caroline Jonsson | 7/10 | 3914 days | 24% |
| Jonny Ronnblom | 7/10 | 3914 days | 24% |
| Catherine Schlachter | 9/10 | 3921 days | 26% |
| Christina Perez | 8/10 | 3921 days | 25% |
| Bea Westkam | 10/10 | 3930 days | 25% |
| Julia Moellers | 8/10 | 3930 days | 25% |
| Anne Haenchen | 8/10 | 3946 days | 24% |
| Kathi | 8/10 | 3946 days | 24% |
| Sophia | 7/10 | 3963 days | 22% |
| Lukas | 6/10 | 3972 days | 20% |
| Celine Darde | 8/10 | 3986 days | 22% |
| Ludovic Denee | 8/10 | 3986 days | 22% |
| Melanie Pretzel | 8/10 | 4313 days | 3% |
| Frederic Birke | 8/10 | 4313 days | 3% |
| Andre and Marina | 2/10 | 4344 days | 0% |
| Hanneke P | 7/10 | 4370 days | 0% |
| Joroen Borkert | 9/10 | 4388 days | 29% |
| Roux | 8/10 | 4391 days | 28% |
| Leo | 9/10 | 4405 days | 29% |
| Lutz Huuemorder | 8/10 | 4407 days | 28% |
| Henzen | 8/10 | 4410 days | 28% |
| Tuedi Muggli | 10/10 | 4673 days | 29% |
| Romla | 8/10 | 4683 days | 28% |
| Ronald Veldman | 8/10 | 4683 days | 28% |
| Richard | 8/10 | 4686 days | 28% |
| Marie Dutron | 6/10 | 4686 days | 25% |
| Carl & Desiree Potter | 9/10 | 4688 days | 29% |
| Frans | 10/10 | 4688 days | 29% |
| Preben vil Helmsen | 10/10 | 4688 days | 29% |
| Johann Maier | 10/10 | 4689 days | 29% |
| Gillian MacLaren | 8/10 | 4690 days | 28% |
| Eline Vakentijn | 8/10 | 4690 days | 28% |
| Langerak | 9/10 | 4692 days | 29% |
| Magda Savels | 8/10 | 4698 days | 28% |
| Roger ter Horst | 9/10 | 4700 days | 29% |
| Maria Dietrich | 9/10 | 4700 days | 29% |
| Samplonius | 8/10 | 4700 days | 28% |
| Manuela Zimmerti | 9/10 | 4768 days | 29% |
| Dirk Faupel | 9/10 | 4771 days | 29% |
| Dirk Faupel | 9/10 | 4771 days | 29% |
| Robert Carswell | 7/10 | 4773 days | 27% |
| Marc & Pauline | 8/10 | 4773 days | 28% |
| Gerard Crothers | 10/10 | 4774 days | 29% |
| Steve Eley | 7/10 | 4776 days | 27% |
| van Rees | 8/10 | 4776 days | 28% |
| Ron & Hannah de Reuver | 9/10 | 4781 days | 29% |
| Wolfgang Goggel | 9/10 | 4781 days | 29% |
| Gary A | 7/10 | 4797 days | 27% |
| Tina | 9/10 | 4797 days | 29% |
| Jon_and_Family | 8/10 | 5011 days | 28% |
| Franzi & Tobi | 9/10 | 5022 days | 29% |
| Oliver Berg | 7/10 | 5025 days | 27% |
| Marianne Wheatley | 10/10 | 5030 days | 29% |
| Krabbe | 8/10 | 5033 days | 28% |
| Rolf | 4/10 | 5033 days | 19% |
| Malcolm Jones | 8/10 | 5035 days | 28% |
| Berger | 8/10 | 5046 days | 28% |
| Pieter | 9/10 | 5047 days | 29% |
| mr Schumader | 9/10 | 5056 days | 29% |
| Tamlin Barton | 6/10 | 5057 days | 25% |
| Tim Van Nispen | 8/10 | 5058 days | 28% |
| Johanna | 6/10 | 5059 days | 25% |
| Eva Stauderova | 10/10 | 5061 days | 29% |
| Patrick Decoster | 9/10 | 5063 days | 29% |
| Liz Dolman | 8/10 | 5065 days | 28% |
| Kay and Colin Yendole | 9/10 | 5066 days | 29% |
| Chamton | 6/10 | 5070 days | 25% |
| willsworthy | 9/10 | 5162 days | 29% |
| allesca | 8/10 | 5193 days | 28% |
| Bergemann | 8/10 | 5393 days | 28% |
| Silke Seemann | 9/10 | 5398 days | 29% |
| John Harrison | 8/10 | 5414 days | 28% |
| Tanja Haring | 9/10 | 5420 days | 29% |
| Amanda Hoff | 10/10 | 5435 days | 29% |
| Beute Jacob | 8/10 | 5448 days | 28% |
| Alies van der plank | 8/10 | 5452 days | 28% |
| mariekef | 10/10 | 5481 days | 29% |
| sanneb1 | 8/10 | 5482 days | 28% |
| keane | 7/10 | 5482 days | 27% |
| mariak | 8/10 | 5483 days | 28% |
| usigmund | 8/10 | 5486 days | 28% |
| hofstetterf | 10/10 | 5495 days | 29% |
| Stefan Lua | 10/10 | 5499 days | 29% |
| Peter Essink | 9/10 | 5499 days | 29% |
| Wolfgang Mages | 10/10 | 5501 days | 29% |
| Ann S | 10/10 | 5505 days | 29% |
| Roeder Grit | 8/10 | 5508 days | 28% |
| ulrichk | 10/10 | 5614 days | 29% |
| gerrys | 7/10 | 5696 days | 27% |
| RolandV | 10/10 | 5725 days | 29% |
| GemmaC | 8/10 | 5730 days | 28% |
| CeesVanW | 8/10 | 5738 days | 28% |
| LaurensD | 7/10 | 5741 days | 27% |
| StefanieA | 10/10 | 5743 days | 29% |
| Hendrik Flier | 7/10 | 5747 days | 27% |
| PBouwmessten | 9/10 | 5761 days | 29% |
| MauzcoV | 9/10 | 5761 days | 29% |
| marcusr | 9/10 | 5782 days | 29% |
| Eugene | 10/10 | 5783 days | 29% |
| Tony | 10/10 | 5789 days | 29% |
| Ian S | 9/10 | 5790 days | 29% |
| Miguel | 9/10 | 5792 days | 29% |
| Thamar | 8/10 | 5806 days | 28% |
| Andie | 10/10 | 5813 days | 29% |
| Miranda | 8/10 | 5818 days | 28% |
| Miha | 10/10 | 5846 days | 29% |
| Gerits | 10/10 | 5854 days | 29% |
| Sluijs | 10/10 | 5858 days | 29% |
| olland | 10/10 | 5862 days | 29% |
| Liz | 10/10 | 5881 days | 29% |
| Stefan | 9/10 | 5905 days | 29% |
| Cory Fusco | 8/10 | 5966 days | 28% |
| Katie Wise | 10/10 | 5974 days | 29% |
| Heckter | 7/10 | 6112 days | 27% |
| Jennifer Baulch | 9/10 | 6117 days | 29% |
| Nancy Dol | 7/10 | 6138 days | 27% |
| David Buckley | 9/10 | 6141 days | 29% |
| Jenny Hulsebosch | 9/10 | 6169 days | 29% |
| Peter | 10/10 | 6210 days | 29% |
| bart | 6/10 | 6215 days | 25% |
| Miriam&Eva | 5/10 | 6431 days | 22% |
| Dennis | 8/10 | 6488 days | 28% |
| Arjan | 7/10 | 6502 days | 27% |
| Meyer | 9/10 | 6504 days | 29% |
| Lucy | 8/10 | 6506 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
-4.04% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 41 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 | -3.98% |
| 198 | -4.00% |
| 199 | -4.02% |
| 200 | -4.04% |
| 201 | -4.06% |
| 202 | -4.08% |
| 203 | -4.10% |
| … | … |
Balancing Adjustment
3.13% 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.