Kia ora, 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 | 2399 days | 61% |
| Rado Hank | 8/10 | 2728 days | 100% |
| Matthias and Adriane | 9/10 | 2983 days | 83% |
| Laure and Pascal | 9/10 | 2996 days | 82% |
| Thomas Klinting | 10/10 | 3022 days | 81% |
| Helna Saumanova | 9/10 | 3027 days | 80% |
| Danny | 7/10 | 3079 days | 71% |
| Marine Lavie | 8/10 | 3341 days | 57% |
| Cate Ronke | 8/10 | 3344 days | 56% |
| Stephan Friedrich | 9/10 | 3360 days | 56% |
| Stula Vladimir | 10/10 | 3378 days | 55% |
| Isabelle | 10/10 | 3381 days | 55% |
| Mikkel Palleson | 7/10 | 3384 days | 50% |
| Meilin | 5/10 | 3390 days | 38% |
| Sebastian and Susanna | 7/10 | 3429 days | 47% |
| Jakob Gerber | 7/10 | 3434 days | 47% |
| Marie Weber | 9/10 | 3743 days | 29% |
| Erik Hafuer | 4/10 | 3777 days | 12% |
| Caroline Jonsson | 7/10 | 4042 days | 6% |
| Jonny Ronnblom | 7/10 | 4042 days | 6% |
| Catherine Schlachter | 9/10 | 4049 days | 7% |
| Christina Perez | 8/10 | 4049 days | 7% |
| Bea Westkam | 10/10 | 4058 days | 6% |
| Julia Moellers | 8/10 | 4058 days | 6% |
| Anne Haenchen | 8/10 | 4074 days | 5% |
| Kathi | 8/10 | 4074 days | 5% |
| Sophia | 7/10 | 4091 days | 3% |
| Lukas | 6/10 | 4100 days | 1% |
| Celine Darde | 8/10 | 4114 days | 2% |
| Ludovic Denee | 8/10 | 4114 days | 2% |
| Melanie Pretzel | 8/10 | 4441 days | 19% |
| Frederic Birke | 8/10 | 4441 days | 19% |
| Andre and Marina | 2/10 | 4472 days | 0% |
| Hanneke P | 7/10 | 4498 days | 18% |
| Joroen Borkert | 9/10 | 4516 days | 20% |
| Roux | 8/10 | 4519 days | 19% |
| Leo | 9/10 | 4533 days | 20% |
| Lutz Huuemorder | 8/10 | 4535 days | 19% |
| Henzen | 8/10 | 4538 days | 19% |
| Tuedi Muggli | 10/10 | 4801 days | 20% |
| Romla | 8/10 | 4811 days | 19% |
| Ronald Veldman | 8/10 | 4811 days | 19% |
| Richard | 8/10 | 4814 days | 19% |
| Marie Dutron | 6/10 | 4814 days | 15% |
| Carl & Desiree Potter | 9/10 | 4816 days | 20% |
| Frans | 10/10 | 4816 days | 20% |
| Preben vil Helmsen | 10/10 | 4816 days | 20% |
| Johann Maier | 10/10 | 4817 days | 20% |
| Gillian MacLaren | 8/10 | 4818 days | 19% |
| Eline Vakentijn | 8/10 | 4818 days | 19% |
| Langerak | 9/10 | 4820 days | 20% |
| Magda Savels | 8/10 | 4826 days | 19% |
| Roger ter Horst | 9/10 | 4828 days | 20% |
| Maria Dietrich | 9/10 | 4828 days | 20% |
| Samplonius | 8/10 | 4828 days | 19% |
| Manuela Zimmerti | 9/10 | 4896 days | 20% |
| Dirk Faupel | 9/10 | 4899 days | 20% |
| Dirk Faupel | 9/10 | 4899 days | 20% |
| Robert Carswell | 7/10 | 4901 days | 18% |
| Marc & Pauline | 8/10 | 4901 days | 19% |
| Gerard Crothers | 10/10 | 4902 days | 20% |
| Steve Eley | 7/10 | 4904 days | 18% |
| van Rees | 8/10 | 4904 days | 19% |
| Ron & Hannah de Reuver | 9/10 | 4909 days | 20% |
| Wolfgang Goggel | 9/10 | 4909 days | 20% |
| Gary A | 7/10 | 4925 days | 18% |
| Tina | 9/10 | 4925 days | 20% |
| Jon_and_Family | 8/10 | 5139 days | 19% |
| Franzi & Tobi | 9/10 | 5150 days | 20% |
| Oliver Berg | 7/10 | 5153 days | 18% |
| Marianne Wheatley | 10/10 | 5158 days | 20% |
| Krabbe | 8/10 | 5161 days | 19% |
| Rolf | 4/10 | 5161 days | 7% |
| Malcolm Jones | 8/10 | 5163 days | 19% |
| Berger | 8/10 | 5174 days | 19% |
| Pieter | 9/10 | 5175 days | 20% |
| mr Schumader | 9/10 | 5184 days | 20% |
| Tamlin Barton | 6/10 | 5185 days | 15% |
| Tim Van Nispen | 8/10 | 5186 days | 19% |
| Johanna | 6/10 | 5187 days | 15% |
| Eva Stauderova | 10/10 | 5189 days | 20% |
| Patrick Decoster | 9/10 | 5191 days | 20% |
| Liz Dolman | 8/10 | 5193 days | 19% |
| Kay and Colin Yendole | 9/10 | 5194 days | 20% |
| Chamton | 6/10 | 5198 days | 15% |
| willsworthy | 9/10 | 5290 days | 20% |
| allesca | 8/10 | 5321 days | 19% |
| Bergemann | 8/10 | 5521 days | 19% |
| Silke Seemann | 9/10 | 5526 days | 20% |
| John Harrison | 8/10 | 5542 days | 19% |
| Tanja Haring | 9/10 | 5548 days | 20% |
| Amanda Hoff | 10/10 | 5563 days | 20% |
| Beute Jacob | 8/10 | 5576 days | 19% |
| Alies van der plank | 8/10 | 5580 days | 19% |
| mariekef | 10/10 | 5609 days | 20% |
| sanneb1 | 8/10 | 5610 days | 19% |
| keane | 7/10 | 5610 days | 18% |
| mariak | 8/10 | 5611 days | 19% |
| usigmund | 8/10 | 5614 days | 19% |
| hofstetterf | 10/10 | 5623 days | 20% |
| Stefan Lua | 10/10 | 5627 days | 20% |
| Peter Essink | 9/10 | 5627 days | 20% |
| Wolfgang Mages | 10/10 | 5629 days | 20% |
| Ann S | 10/10 | 5633 days | 20% |
| Roeder Grit | 8/10 | 5636 days | 19% |
| ulrichk | 10/10 | 5742 days | 20% |
| gerrys | 7/10 | 5824 days | 18% |
| RolandV | 10/10 | 5853 days | 20% |
| GemmaC | 8/10 | 5858 days | 19% |
| CeesVanW | 8/10 | 5866 days | 19% |
| LaurensD | 7/10 | 5869 days | 18% |
| StefanieA | 10/10 | 5871 days | 20% |
| Hendrik Flier | 7/10 | 5875 days | 18% |
| PBouwmessten | 9/10 | 5889 days | 20% |
| MauzcoV | 9/10 | 5889 days | 20% |
| marcusr | 9/10 | 5911 days | 20% |
| Eugene | 10/10 | 5911 days | 20% |
| Tony | 10/10 | 5917 days | 20% |
| Ian S | 9/10 | 5918 days | 20% |
| Miguel | 9/10 | 5920 days | 20% |
| Thamar | 8/10 | 5934 days | 19% |
| Andie | 10/10 | 5941 days | 20% |
| Miranda | 8/10 | 5946 days | 19% |
| Miha | 10/10 | 5974 days | 20% |
| Gerits | 10/10 | 5982 days | 20% |
| Sluijs | 10/10 | 5986 days | 20% |
| olland | 10/10 | 5990 days | 20% |
| Liz | 10/10 | 6009 days | 20% |
| Stefan | 9/10 | 6033 days | 20% |
| Cory Fusco | 8/10 | 6094 days | 19% |
| Katie Wise | 10/10 | 6102 days | 20% |
| Heckter | 7/10 | 6240 days | 18% |
| Jennifer Baulch | 9/10 | 6245 days | 20% |
| Nancy Dol | 7/10 | 6266 days | 18% |
| David Buckley | 9/10 | 6269 days | 20% |
| Jenny Hulsebosch | 9/10 | 6297 days | 20% |
| Peter | 10/10 | 6338 days | 20% |
| bart | 6/10 | 6343 days | 15% |
| Miriam&Eva | 5/10 | 6559 days | 11% |
| Dennis | 8/10 | 6616 days | 19% |
| Arjan | 7/10 | 6630 days | 18% |
| Meyer | 9/10 | 6632 days | 20% |
| Lucy | 8/10 | 6634 days | 19% |
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
-3.23% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 73 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 | -3.18% |
| 198 | -3.19% |
| 199 | -3.21% |
| 200 | -3.23% |
| 201 | -3.24% |
| 202 | -3.26% |
| 203 | -3.27% |
| … | … |
Balancing Adjustment
2.93% 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.