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
83.83%
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 | 2623 days | 67% |
| Rado Hank | 8/10 | 2952 days | 100% |
| Matthias and Adriane | 9/10 | 3207 days | 82% |
| Laure and Pascal | 9/10 | 3220 days | 82% |
| Thomas Klinting | 10/10 | 3246 days | 80% |
| Helna Saumanova | 9/10 | 3251 days | 79% |
| Danny | 7/10 | 3303 days | 71% |
| Marine Lavie | 8/10 | 3565 days | 56% |
| Cate Ronke | 8/10 | 3568 days | 56% |
| Stephan Friedrich | 9/10 | 3584 days | 55% |
| Stula Vladimir | 10/10 | 3602 days | 54% |
| Isabelle | 10/10 | 3605 days | 54% |
| Mikkel Palleson | 7/10 | 3608 days | 50% |
| Meilin | 5/10 | 3614 days | 40% |
| Sebastian and Susanna | 7/10 | 3653 days | 47% |
| Jakob Gerber | 7/10 | 3658 days | 46% |
| Marie Weber | 9/10 | 3967 days | 27% |
| Erik Hafuer | 4/10 | 4001 days | 15% |
| Caroline Jonsson | 7/10 | 4266 days | 5% |
| Jonny Ronnblom | 7/10 | 4266 days | 5% |
| Catherine Schlachter | 9/10 | 4273 days | 5% |
| Christina Perez | 8/10 | 4273 days | 5% |
| Bea Westkam | 10/10 | 4282 days | 4% |
| Julia Moellers | 8/10 | 4282 days | 4% |
| Anne Haenchen | 8/10 | 4298 days | 3% |
| Kathi | 8/10 | 4298 days | 3% |
| Sophia | 7/10 | 4315 days | 1% |
| Lukas | 6/10 | 4324 days | 1% |
| Celine Darde | 8/10 | 4338 days | 0% |
| Ludovic Denee | 8/10 | 4338 days | 0% |
| Melanie Pretzel | 8/10 | 4665 days | 34% |
| Frederic Birke | 8/10 | 4665 days | 34% |
| Andre and Marina | 2/10 | 4696 days | 14% |
| Hanneke P | 7/10 | 4722 days | 32% |
| Joroen Borkert | 9/10 | 4740 days | 34% |
| Roux | 8/10 | 4743 days | 34% |
| Leo | 9/10 | 4757 days | 34% |
| Lutz Huuemorder | 8/10 | 4759 days | 34% |
| Henzen | 8/10 | 4762 days | 34% |
| Tuedi Muggli | 10/10 | 5025 days | 35% |
| Romla | 8/10 | 5035 days | 34% |
| Ronald Veldman | 8/10 | 5035 days | 34% |
| Richard | 8/10 | 5038 days | 34% |
| Marie Dutron | 6/10 | 5038 days | 29% |
| Carl & Desiree Potter | 9/10 | 5040 days | 34% |
| Frans | 10/10 | 5040 days | 35% |
| Preben vil Helmsen | 10/10 | 5040 days | 35% |
| Johann Maier | 10/10 | 5041 days | 35% |
| Gillian MacLaren | 8/10 | 5042 days | 34% |
| Eline Vakentijn | 8/10 | 5042 days | 34% |
| Langerak | 9/10 | 5044 days | 34% |
| Magda Savels | 8/10 | 5050 days | 34% |
| Roger ter Horst | 9/10 | 5052 days | 34% |
| Maria Dietrich | 9/10 | 5052 days | 34% |
| Samplonius | 8/10 | 5052 days | 34% |
| Manuela Zimmerti | 9/10 | 5120 days | 34% |
| Dirk Faupel | 9/10 | 5123 days | 34% |
| Dirk Faupel | 9/10 | 5123 days | 34% |
| Robert Carswell | 7/10 | 5125 days | 32% |
| Marc & Pauline | 8/10 | 5125 days | 34% |
| Gerard Crothers | 10/10 | 5126 days | 35% |
| Steve Eley | 7/10 | 5128 days | 32% |
| van Rees | 8/10 | 5128 days | 34% |
| Ron & Hannah de Reuver | 9/10 | 5133 days | 34% |
| Wolfgang Goggel | 9/10 | 5133 days | 34% |
| Gary A | 7/10 | 5149 days | 32% |
| Tina | 9/10 | 5149 days | 34% |
| Jon_and_Family | 8/10 | 5363 days | 34% |
| Franzi & Tobi | 9/10 | 5374 days | 34% |
| Oliver Berg | 7/10 | 5377 days | 32% |
| Marianne Wheatley | 10/10 | 5382 days | 35% |
| Krabbe | 8/10 | 5385 days | 34% |
| Rolf | 4/10 | 5385 days | 22% |
| Malcolm Jones | 8/10 | 5387 days | 34% |
| Berger | 8/10 | 5398 days | 34% |
| Pieter | 9/10 | 5399 days | 34% |
| mr Schumader | 9/10 | 5408 days | 34% |
| Tamlin Barton | 6/10 | 5409 days | 29% |
| Tim Van Nispen | 8/10 | 5410 days | 34% |
| Johanna | 6/10 | 5411 days | 29% |
| Eva Stauderova | 10/10 | 5413 days | 35% |
| Patrick Decoster | 9/10 | 5415 days | 34% |
| Liz Dolman | 8/10 | 5417 days | 34% |
| Kay and Colin Yendole | 9/10 | 5418 days | 34% |
| Chamton | 6/10 | 5422 days | 29% |
| willsworthy | 9/10 | 5514 days | 34% |
| allesca | 8/10 | 5545 days | 34% |
| Bergemann | 8/10 | 5745 days | 34% |
| Silke Seemann | 9/10 | 5750 days | 34% |
| John Harrison | 8/10 | 5766 days | 34% |
| Tanja Haring | 9/10 | 5772 days | 34% |
| Amanda Hoff | 10/10 | 5787 days | 35% |
| Beute Jacob | 8/10 | 5800 days | 34% |
| Alies van der plank | 8/10 | 5804 days | 34% |
| mariekef | 10/10 | 5833 days | 35% |
| sanneb1 | 8/10 | 5834 days | 34% |
| keane | 7/10 | 5834 days | 32% |
| mariak | 8/10 | 5835 days | 34% |
| usigmund | 8/10 | 5838 days | 34% |
| hofstetterf | 10/10 | 5847 days | 35% |
| Stefan Lua | 10/10 | 5851 days | 35% |
| Peter Essink | 9/10 | 5851 days | 34% |
| Wolfgang Mages | 10/10 | 5853 days | 35% |
| Ann S | 10/10 | 5857 days | 35% |
| Roeder Grit | 8/10 | 5860 days | 34% |
| ulrichk | 10/10 | 5966 days | 35% |
| gerrys | 7/10 | 6048 days | 32% |
| RolandV | 10/10 | 6077 days | 35% |
| GemmaC | 8/10 | 6082 days | 34% |
| CeesVanW | 8/10 | 6090 days | 34% |
| LaurensD | 7/10 | 6093 days | 32% |
| StefanieA | 10/10 | 6095 days | 35% |
| Hendrik Flier | 7/10 | 6099 days | 32% |
| PBouwmessten | 9/10 | 6113 days | 34% |
| MauzcoV | 9/10 | 6113 days | 34% |
| marcusr | 9/10 | 6134 days | 34% |
| Eugene | 10/10 | 6134 days | 35% |
| Tony | 10/10 | 6141 days | 35% |
| Ian S | 9/10 | 6142 days | 34% |
| Miguel | 9/10 | 6143 days | 34% |
| Thamar | 8/10 | 6157 days | 34% |
| Andie | 10/10 | 6165 days | 35% |
| Miranda | 8/10 | 6169 days | 34% |
| Miha | 10/10 | 6197 days | 35% |
| Gerits | 10/10 | 6205 days | 35% |
| Sluijs | 10/10 | 6210 days | 35% |
| olland | 10/10 | 6213 days | 35% |
| Liz | 10/10 | 6232 days | 35% |
| Stefan | 9/10 | 6256 days | 34% |
| Cory Fusco | 8/10 | 6317 days | 34% |
| Katie Wise | 10/10 | 6325 days | 35% |
| Heckter | 7/10 | 6464 days | 32% |
| Jennifer Baulch | 9/10 | 6469 days | 34% |
| Nancy Dol | 7/10 | 6490 days | 32% |
| David Buckley | 9/10 | 6493 days | 34% |
| Jenny Hulsebosch | 9/10 | 6521 days | 34% |
| Peter | 10/10 | 6562 days | 35% |
| bart | 6/10 | 6567 days | 29% |
| Miriam&Eva | 5/10 | 6783 days | 26% |
| Dennis | 8/10 | 6840 days | 34% |
| Arjan | 7/10 | 6854 days | 32% |
| Meyer | 9/10 | 6856 days | 34% |
| Lucy | 8/10 | 6858 days | 34% |
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
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
3.07% 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.