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
81.88%
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 | 1089 days | 93% |
| Rado Hank | 8/10 | 1418 days | 100% |
| Matthias and Adriane | 9/10 | 1673 days | 93% |
| Laure and Pascal | 9/10 | 1686 days | 93% |
| Thomas Klinting | 10/10 | 1712 days | 91% |
| Helna Saumanova | 9/10 | 1717 days | 91% |
| Danny | 7/10 | 1769 days | 80% |
| Marine Lavie | 8/10 | 2031 days | 72% |
| Cate Ronke | 8/10 | 2034 days | 72% |
| Stephan Friedrich | 9/10 | 2050 days | 75% |
| Stula Vladimir | 10/10 | 2068 days | 74% |
| Isabelle | 10/10 | 2071 days | 74% |
| Mikkel Palleson | 7/10 | 2074 days | 67% |
| Meilin | 5/10 | 2080 days | 59% |
| Sebastian and Susanna | 7/10 | 2119 days | 65% |
| Jakob Gerber | 7/10 | 2124 days | 65% |
| Marie Weber | 9/10 | 2433 days | 57% |
| Erik Hafuer | 4/10 | 2467 days | 43% |
| Caroline Jonsson | 7/10 | 2732 days | 38% |
| Jonny Ronnblom | 7/10 | 2732 days | 38% |
| Catherine Schlachter | 9/10 | 2739 days | 42% |
| Christina Perez | 8/10 | 2739 days | 40% |
| Bea Westkam | 10/10 | 2748 days | 42% |
| Julia Moellers | 8/10 | 2748 days | 40% |
| Anne Haenchen | 8/10 | 2764 days | 39% |
| Kathi | 8/10 | 2764 days | 39% |
| Sophia | 7/10 | 2781 days | 36% |
| Lukas | 6/10 | 2790 days | 33% |
| Celine Darde | 8/10 | 2804 days | 37% |
| Ludovic Denee | 8/10 | 2804 days | 37% |
| Melanie Pretzel | 8/10 | 3131 days | 22% |
| Frederic Birke | 8/10 | 3131 days | 22% |
| Andre and Marina | 2/10 | 3162 days | 16% |
| Hanneke P | 7/10 | 3188 days | 19% |
| Joroen Borkert | 9/10 | 3206 days | 20% |
| Roux | 8/10 | 3209 days | 19% |
| Leo | 9/10 | 3223 days | 19% |
| Lutz Huuemorder | 8/10 | 3225 days | 18% |
| Henzen | 8/10 | 3228 days | 18% |
| Tuedi Muggli | 10/10 | 3491 days | 6% |
| Romla | 8/10 | 3501 days | 5% |
| Ronald Veldman | 8/10 | 3501 days | 5% |
| Richard | 8/10 | 3504 days | 5% |
| Marie Dutron | 6/10 | 3504 days | 4% |
| Carl & Desiree Potter | 9/10 | 3506 days | 5% |
| Frans | 10/10 | 3506 days | 5% |
| Preben vil Helmsen | 10/10 | 3506 days | 5% |
| Johann Maier | 10/10 | 3507 days | 5% |
| Gillian MacLaren | 8/10 | 3508 days | 5% |
| Eline Vakentijn | 8/10 | 3508 days | 5% |
| Langerak | 9/10 | 3510 days | 5% |
| Magda Savels | 8/10 | 3516 days | 5% |
| Roger ter Horst | 9/10 | 3518 days | 5% |
| Maria Dietrich | 9/10 | 3518 days | 5% |
| Samplonius | 8/10 | 3518 days | 4% |
| Manuela Zimmerti | 9/10 | 3586 days | 2% |
| Dirk Faupel | 9/10 | 3589 days | 1% |
| Dirk Faupel | 9/10 | 3589 days | 1% |
| Robert Carswell | 7/10 | 3591 days | 1% |
| Marc & Pauline | 8/10 | 3591 days | 1% |
| Gerard Crothers | 10/10 | 3592 days | 1% |
| Steve Eley | 7/10 | 3594 days | 1% |
| van Rees | 8/10 | 3594 days | 1% |
| Ron & Hannah de Reuver | 9/10 | 3599 days | 1% |
| Wolfgang Goggel | 9/10 | 3599 days | 1% |
| Gary A | 7/10 | 3615 days | 0% |
| Tina | 9/10 | 3615 days | 0% |
| Jon_and_Family | 8/10 | 3829 days | 22% |
| Franzi & Tobi | 9/10 | 3840 days | 23% |
| Oliver Berg | 7/10 | 3843 days | 21% |
| Marianne Wheatley | 10/10 | 3848 days | 23% |
| Krabbe | 8/10 | 3851 days | 22% |
| Rolf | 4/10 | 3851 days | 18% |
| Malcolm Jones | 8/10 | 3853 days | 22% |
| Berger | 8/10 | 3864 days | 22% |
| Pieter | 9/10 | 3865 days | 23% |
| mr Schumader | 9/10 | 3874 days | 23% |
| Tamlin Barton | 6/10 | 3875 days | 19% |
| Tim Van Nispen | 8/10 | 3876 days | 22% |
| Johanna | 6/10 | 3877 days | 19% |
| Eva Stauderova | 10/10 | 3879 days | 23% |
| Patrick Decoster | 9/10 | 3881 days | 23% |
| Liz Dolman | 8/10 | 3883 days | 22% |
| Kay and Colin Yendole | 9/10 | 3884 days | 23% |
| Chamton | 6/10 | 3888 days | 19% |
| willsworthy | 9/10 | 3980 days | 23% |
| allesca | 8/10 | 4011 days | 22% |
| Bergemann | 8/10 | 4211 days | 22% |
| Silke Seemann | 9/10 | 4216 days | 23% |
| John Harrison | 8/10 | 4232 days | 22% |
| Tanja Haring | 9/10 | 4238 days | 23% |
| Amanda Hoff | 10/10 | 4253 days | 23% |
| Beute Jacob | 8/10 | 4266 days | 22% |
| Alies van der plank | 8/10 | 4270 days | 22% |
| mariekef | 10/10 | 4299 days | 23% |
| sanneb1 | 8/10 | 4300 days | 22% |
| keane | 7/10 | 4300 days | 21% |
| mariak | 8/10 | 4301 days | 22% |
| usigmund | 8/10 | 4304 days | 22% |
| hofstetterf | 10/10 | 4313 days | 23% |
| Stefan Lua | 10/10 | 4317 days | 23% |
| Peter Essink | 9/10 | 4317 days | 23% |
| Wolfgang Mages | 10/10 | 4319 days | 23% |
| Ann S | 10/10 | 4323 days | 23% |
| Roeder Grit | 8/10 | 4326 days | 22% |
| ulrichk | 10/10 | 4432 days | 23% |
| gerrys | 7/10 | 4514 days | 21% |
| RolandV | 10/10 | 4543 days | 23% |
| GemmaC | 8/10 | 4548 days | 22% |
| CeesVanW | 8/10 | 4556 days | 22% |
| LaurensD | 7/10 | 4559 days | 21% |
| StefanieA | 10/10 | 4561 days | 23% |
| Hendrik Flier | 7/10 | 4565 days | 21% |
| PBouwmessten | 9/10 | 4579 days | 23% |
| MauzcoV | 9/10 | 4579 days | 23% |
| marcusr | 9/10 | 4600 days | 23% |
| Eugene | 10/10 | 4600 days | 23% |
| Tony | 10/10 | 4607 days | 23% |
| Ian S | 9/10 | 4608 days | 23% |
| Miguel | 9/10 | 4609 days | 23% |
| Thamar | 8/10 | 4623 days | 22% |
| Andie | 10/10 | 4631 days | 23% |
| Miranda | 8/10 | 4635 days | 22% |
| Miha | 10/10 | 4664 days | 23% |
| Gerits | 10/10 | 4671 days | 23% |
| Sluijs | 10/10 | 4676 days | 23% |
| olland | 10/10 | 4679 days | 23% |
| Liz | 10/10 | 4698 days | 23% |
| Stefan | 9/10 | 4723 days | 23% |
| Cory Fusco | 8/10 | 4783 days | 22% |
| Katie Wise | 10/10 | 4791 days | 23% |
| Heckter | 7/10 | 4930 days | 21% |
| Jennifer Baulch | 9/10 | 4935 days | 23% |
| Nancy Dol | 7/10 | 4956 days | 21% |
| David Buckley | 9/10 | 4959 days | 23% |
| Jenny Hulsebosch | 9/10 | 4987 days | 23% |
| Peter | 10/10 | 5028 days | 23% |
| bart | 6/10 | 5033 days | 19% |
| Miriam&Eva | 5/10 | 5249 days | 18% |
| Dennis | 8/10 | 5306 days | 22% |
| Arjan | 7/10 | 5320 days | 21% |
| Meyer | 9/10 | 5322 days | 23% |
| Lucy | 8/10 | 5324 days | 22% |
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
-3.12% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 72 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 | -3.07% |
| 198 | -3.09% |
| 199 | -3.10% |
| 200 | -3.12% |
| 201 | -3.13% |
| 202 | -3.15% |
| 203 | -3.16% |
| … | … |
Final Ranking Score
79%
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.