Ranking Score Explained
Hi there, 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
82.75%
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 | 1330 days | 94% |
| Rado Hank | 8/10 | 1659 days | 100% |
| Matthias and Adriane | 9/10 | 1914 days | 91% |
| Laure and Pascal | 9/10 | 1927 days | 90% |
| Thomas Klinting | 10/10 | 1953 days | 89% |
| Helna Saumanova | 9/10 | 1958 days | 88% |
| Danny | 7/10 | 2010 days | 77% |
| Marine Lavie | 8/10 | 2272 days | 66% |
| Cate Ronke | 8/10 | 2275 days | 66% |
| Stephan Friedrich | 9/10 | 2291 days | 69% |
| Stula Vladimir | 10/10 | 2309 days | 68% |
| Isabelle | 10/10 | 2312 days | 68% |
| Mikkel Palleson | 7/10 | 2315 days | 61% |
| Meilin | 5/10 | 2321 days | 53% |
| Sebastian and Susanna | 7/10 | 2360 days | 58% |
| Jakob Gerber | 7/10 | 2365 days | 58% |
| Marie Weber | 9/10 | 2674 days | 47% |
| Erik Hafuer | 4/10 | 2708 days | 33% |
| Caroline Jonsson | 7/10 | 2973 days | 26% |
| Jonny Ronnblom | 7/10 | 2973 days | 26% |
| Catherine Schlachter | 9/10 | 2980 days | 29% |
| Christina Perez | 8/10 | 2980 days | 27% |
| Bea Westkam | 10/10 | 2989 days | 28% |
| Julia Moellers | 8/10 | 2989 days | 27% |
| Anne Haenchen | 8/10 | 3005 days | 26% |
| Kathi | 8/10 | 3005 days | 26% |
| Sophia | 7/10 | 3022 days | 23% |
| Lukas | 6/10 | 3031 days | 20% |
| Celine Darde | 8/10 | 3045 days | 23% |
| Ludovic Denee | 8/10 | 3045 days | 23% |
| Melanie Pretzel | 8/10 | 3372 days | 5% |
| Frederic Birke | 8/10 | 3372 days | 5% |
| Andre and Marina | 2/10 | 3403 days | 1% |
| Hanneke P | 7/10 | 3429 days | 2% |
| Joroen Borkert | 9/10 | 3447 days | 2% |
| Roux | 8/10 | 3450 days | 1% |
| Leo | 9/10 | 3464 days | 1% |
| Lutz Huuemorder | 8/10 | 3466 days | 0% |
| Henzen | 8/10 | 3469 days | 0% |
| Tuedi Muggli | 10/10 | 3732 days | 20% |
| Romla | 8/10 | 3742 days | 18% |
| Ronald Veldman | 8/10 | 3742 days | 18% |
| Richard | 8/10 | 3745 days | 18% |
| Marie Dutron | 6/10 | 3745 days | 15% |
| Carl & Desiree Potter | 9/10 | 3747 days | 20% |
| Frans | 10/10 | 3747 days | 20% |
| Preben vil Helmsen | 10/10 | 3747 days | 20% |
| Johann Maier | 10/10 | 3748 days | 20% |
| Gillian MacLaren | 8/10 | 3749 days | 18% |
| Eline Vakentijn | 8/10 | 3749 days | 18% |
| Langerak | 9/10 | 3751 days | 20% |
| Magda Savels | 8/10 | 3757 days | 18% |
| Roger ter Horst | 9/10 | 3759 days | 20% |
| Maria Dietrich | 9/10 | 3759 days | 20% |
| Samplonius | 8/10 | 3759 days | 18% |
| Manuela Zimmerti | 9/10 | 3827 days | 20% |
| Dirk Faupel | 9/10 | 3830 days | 20% |
| Dirk Faupel | 9/10 | 3830 days | 20% |
| Robert Carswell | 7/10 | 3832 days | 17% |
| Marc & Pauline | 8/10 | 3832 days | 18% |
| Gerard Crothers | 10/10 | 3833 days | 20% |
| Steve Eley | 7/10 | 3835 days | 17% |
| van Rees | 8/10 | 3835 days | 18% |
| Ron & Hannah de Reuver | 9/10 | 3840 days | 20% |
| Wolfgang Goggel | 9/10 | 3840 days | 20% |
| Gary A | 7/10 | 3856 days | 17% |
| Tina | 9/10 | 3856 days | 20% |
| Jon_and_Family | 8/10 | 4070 days | 18% |
| Franzi & Tobi | 9/10 | 4081 days | 20% |
| Oliver Berg | 7/10 | 4084 days | 17% |
| Marianne Wheatley | 10/10 | 4089 days | 20% |
| Krabbe | 8/10 | 4092 days | 18% |
| Rolf | 4/10 | 4092 days | 13% |
| Malcolm Jones | 8/10 | 4094 days | 18% |
| Berger | 8/10 | 4105 days | 18% |
| Pieter | 9/10 | 4106 days | 20% |
| mr Schumader | 9/10 | 4115 days | 20% |
| Tamlin Barton | 6/10 | 4116 days | 15% |
| Tim Van Nispen | 8/10 | 4117 days | 18% |
| Johanna | 6/10 | 4118 days | 15% |
| Eva Stauderova | 10/10 | 4120 days | 20% |
| Patrick Decoster | 9/10 | 4122 days | 20% |
| Liz Dolman | 8/10 | 4124 days | 18% |
| Kay and Colin Yendole | 9/10 | 4125 days | 20% |
| Chamton | 6/10 | 4129 days | 15% |
| willsworthy | 9/10 | 4221 days | 20% |
| allesca | 8/10 | 4252 days | 18% |
| Bergemann | 8/10 | 4452 days | 18% |
| Silke Seemann | 9/10 | 4457 days | 20% |
| John Harrison | 8/10 | 4473 days | 18% |
| Tanja Haring | 9/10 | 4479 days | 20% |
| Amanda Hoff | 10/10 | 4494 days | 20% |
| Beute Jacob | 8/10 | 4507 days | 18% |
| Alies van der plank | 8/10 | 4511 days | 18% |
| mariekef | 10/10 | 4540 days | 20% |
| sanneb1 | 8/10 | 4541 days | 18% |
| keane | 7/10 | 4541 days | 17% |
| mariak | 8/10 | 4542 days | 18% |
| usigmund | 8/10 | 4545 days | 18% |
| hofstetterf | 10/10 | 4554 days | 20% |
| Stefan Lua | 10/10 | 4558 days | 20% |
| Peter Essink | 9/10 | 4558 days | 20% |
| Wolfgang Mages | 10/10 | 4560 days | 20% |
| Ann S | 10/10 | 4564 days | 20% |
| Roeder Grit | 8/10 | 4567 days | 18% |
| ulrichk | 10/10 | 4673 days | 20% |
| gerrys | 7/10 | 4755 days | 17% |
| RolandV | 10/10 | 4784 days | 20% |
| GemmaC | 8/10 | 4789 days | 18% |
| CeesVanW | 8/10 | 4797 days | 18% |
| LaurensD | 7/10 | 4800 days | 17% |
| StefanieA | 10/10 | 4802 days | 20% |
| Hendrik Flier | 7/10 | 4806 days | 17% |
| PBouwmessten | 9/10 | 4820 days | 20% |
| MauzcoV | 9/10 | 4820 days | 20% |
| marcusr | 9/10 | 4842 days | 20% |
| Eugene | 10/10 | 4842 days | 20% |
| Tony | 10/10 | 4848 days | 20% |
| Ian S | 9/10 | 4849 days | 20% |
| Miguel | 9/10 | 4851 days | 20% |
| Thamar | 8/10 | 4865 days | 18% |
| Andie | 10/10 | 4872 days | 20% |
| Miranda | 8/10 | 4877 days | 18% |
| Miha | 10/10 | 4905 days | 20% |
| Gerits | 10/10 | 4913 days | 20% |
| Sluijs | 10/10 | 4917 days | 20% |
| olland | 10/10 | 4921 days | 20% |
| Liz | 10/10 | 4940 days | 20% |
| Stefan | 9/10 | 4964 days | 20% |
| Cory Fusco | 8/10 | 5025 days | 18% |
| Katie Wise | 10/10 | 5033 days | 20% |
| Heckter | 7/10 | 5171 days | 17% |
| Jennifer Baulch | 9/10 | 5176 days | 20% |
| Nancy Dol | 7/10 | 5197 days | 17% |
| David Buckley | 9/10 | 5200 days | 20% |
| Jenny Hulsebosch | 9/10 | 5228 days | 20% |
| Peter | 10/10 | 5269 days | 20% |
| bart | 6/10 | 5274 days | 15% |
| Miriam&Eva | 5/10 | 5490 days | 14% |
| Dennis | 8/10 | 5547 days | 18% |
| Arjan | 7/10 | 5561 days | 17% |
| Meyer | 9/10 | 5563 days | 20% |
| Lucy | 8/10 | 5565 days | 18% |
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
-2.63% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 98 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 | -2.59% |
| 198 | -2.60% |
| 199 | -2.62% |
| 200 | -2.63% |
| 201 | -2.64% |
| 202 | -2.66% |
| 203 | -2.67% |
| … | … |
Final Ranking Score
80%
The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.