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
83.39%
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 | 2344 days | 61% |
| Rado Hank | 8/10 | 2673 days | 100% |
| Matthias and Adriane | 9/10 | 2928 days | 84% |
| Laure and Pascal | 9/10 | 2941 days | 83% |
| Thomas Klinting | 10/10 | 2967 days | 82% |
| Helna Saumanova | 9/10 | 2972 days | 81% |
| Danny | 7/10 | 3024 days | 71% |
| Marine Lavie | 8/10 | 3286 days | 58% |
| Cate Ronke | 8/10 | 3289 days | 58% |
| Stephan Friedrich | 9/10 | 3305 days | 58% |
| Stula Vladimir | 10/10 | 3323 days | 57% |
| Isabelle | 10/10 | 3326 days | 57% |
| Mikkel Palleson | 7/10 | 3329 days | 52% |
| Meilin | 5/10 | 3335 days | 39% |
| Sebastian and Susanna | 7/10 | 3374 days | 49% |
| Jakob Gerber | 7/10 | 3379 days | 49% |
| Marie Weber | 9/10 | 3688 days | 31% |
| Erik Hafuer | 4/10 | 3722 days | 14% |
| Caroline Jonsson | 7/10 | 3987 days | 9% |
| Jonny Ronnblom | 7/10 | 3987 days | 9% |
| Catherine Schlachter | 9/10 | 3994 days | 10% |
| Christina Perez | 8/10 | 3994 days | 10% |
| Bea Westkam | 10/10 | 4003 days | 10% |
| Julia Moellers | 8/10 | 4003 days | 9% |
| Anne Haenchen | 8/10 | 4019 days | 8% |
| Kathi | 8/10 | 4019 days | 8% |
| Sophia | 7/10 | 4036 days | 6% |
| Lukas | 6/10 | 4045 days | 4% |
| Celine Darde | 8/10 | 4059 days | 6% |
| Ludovic Denee | 8/10 | 4059 days | 6% |
| Melanie Pretzel | 8/10 | 4386 days | 19% |
| Frederic Birke | 8/10 | 4386 days | 19% |
| Andre and Marina | 2/10 | 4417 days | 0% |
| Hanneke P | 7/10 | 4443 days | 17% |
| Joroen Borkert | 9/10 | 4461 days | 19% |
| Roux | 8/10 | 4464 days | 19% |
| Leo | 9/10 | 4478 days | 19% |
| Lutz Huuemorder | 8/10 | 4480 days | 19% |
| Henzen | 8/10 | 4483 days | 19% |
| Tuedi Muggli | 10/10 | 4746 days | 19% |
| Romla | 8/10 | 4756 days | 19% |
| Ronald Veldman | 8/10 | 4756 days | 19% |
| Richard | 8/10 | 4759 days | 19% |
| Marie Dutron | 6/10 | 4759 days | 14% |
| Carl & Desiree Potter | 9/10 | 4761 days | 19% |
| Frans | 10/10 | 4761 days | 19% |
| Preben vil Helmsen | 10/10 | 4761 days | 19% |
| Johann Maier | 10/10 | 4762 days | 19% |
| Gillian MacLaren | 8/10 | 4763 days | 19% |
| Eline Vakentijn | 8/10 | 4763 days | 19% |
| Langerak | 9/10 | 4765 days | 19% |
| Magda Savels | 8/10 | 4771 days | 19% |
| Roger ter Horst | 9/10 | 4773 days | 19% |
| Maria Dietrich | 9/10 | 4773 days | 19% |
| Samplonius | 8/10 | 4773 days | 19% |
| Manuela Zimmerti | 9/10 | 4841 days | 19% |
| Dirk Faupel | 9/10 | 4844 days | 19% |
| Dirk Faupel | 9/10 | 4844 days | 19% |
| Robert Carswell | 7/10 | 4846 days | 17% |
| Marc & Pauline | 8/10 | 4846 days | 19% |
| Gerard Crothers | 10/10 | 4847 days | 19% |
| Steve Eley | 7/10 | 4849 days | 17% |
| van Rees | 8/10 | 4849 days | 19% |
| Ron & Hannah de Reuver | 9/10 | 4854 days | 19% |
| Wolfgang Goggel | 9/10 | 4854 days | 19% |
| Gary A | 7/10 | 4870 days | 17% |
| Tina | 9/10 | 4870 days | 19% |
| Jon_and_Family | 8/10 | 5084 days | 19% |
| Franzi & Tobi | 9/10 | 5095 days | 19% |
| Oliver Berg | 7/10 | 5098 days | 17% |
| Marianne Wheatley | 10/10 | 5103 days | 19% |
| Krabbe | 8/10 | 5106 days | 19% |
| Rolf | 4/10 | 5106 days | 7% |
| Malcolm Jones | 8/10 | 5108 days | 19% |
| Berger | 8/10 | 5119 days | 19% |
| Pieter | 9/10 | 5120 days | 19% |
| mr Schumader | 9/10 | 5129 days | 19% |
| Tamlin Barton | 6/10 | 5130 days | 14% |
| Tim Van Nispen | 8/10 | 5131 days | 19% |
| Johanna | 6/10 | 5132 days | 14% |
| Eva Stauderova | 10/10 | 5134 days | 19% |
| Patrick Decoster | 9/10 | 5136 days | 19% |
| Liz Dolman | 8/10 | 5138 days | 19% |
| Kay and Colin Yendole | 9/10 | 5139 days | 19% |
| Chamton | 6/10 | 5143 days | 14% |
| willsworthy | 9/10 | 5235 days | 19% |
| allesca | 8/10 | 5266 days | 19% |
| Bergemann | 8/10 | 5466 days | 19% |
| Silke Seemann | 9/10 | 5471 days | 19% |
| John Harrison | 8/10 | 5487 days | 19% |
| Tanja Haring | 9/10 | 5493 days | 19% |
| Amanda Hoff | 10/10 | 5508 days | 19% |
| Beute Jacob | 8/10 | 5521 days | 19% |
| Alies van der plank | 8/10 | 5525 days | 19% |
| mariekef | 10/10 | 5554 days | 19% |
| sanneb1 | 8/10 | 5555 days | 19% |
| keane | 7/10 | 5555 days | 17% |
| mariak | 8/10 | 5556 days | 19% |
| usigmund | 8/10 | 5559 days | 19% |
| hofstetterf | 10/10 | 5568 days | 19% |
| Stefan Lua | 10/10 | 5572 days | 19% |
| Peter Essink | 9/10 | 5572 days | 19% |
| Wolfgang Mages | 10/10 | 5574 days | 19% |
| Ann S | 10/10 | 5578 days | 19% |
| Roeder Grit | 8/10 | 5581 days | 19% |
| ulrichk | 10/10 | 5687 days | 19% |
| gerrys | 7/10 | 5769 days | 17% |
| RolandV | 10/10 | 5798 days | 19% |
| GemmaC | 8/10 | 5803 days | 19% |
| CeesVanW | 8/10 | 5811 days | 19% |
| LaurensD | 7/10 | 5814 days | 17% |
| StefanieA | 10/10 | 5816 days | 19% |
| Hendrik Flier | 7/10 | 5820 days | 17% |
| PBouwmessten | 9/10 | 5834 days | 19% |
| MauzcoV | 9/10 | 5834 days | 19% |
| marcusr | 9/10 | 5856 days | 19% |
| Eugene | 10/10 | 5856 days | 19% |
| Tony | 10/10 | 5862 days | 19% |
| Ian S | 9/10 | 5864 days | 19% |
| Miguel | 9/10 | 5865 days | 19% |
| Thamar | 8/10 | 5879 days | 19% |
| Andie | 10/10 | 5886 days | 19% |
| Miranda | 8/10 | 5891 days | 19% |
| Miha | 10/10 | 5919 days | 19% |
| Gerits | 10/10 | 5927 days | 19% |
| Sluijs | 10/10 | 5931 days | 19% |
| olland | 10/10 | 5935 days | 19% |
| Liz | 10/10 | 5954 days | 19% |
| Stefan | 9/10 | 5978 days | 19% |
| Cory Fusco | 8/10 | 6039 days | 19% |
| Katie Wise | 10/10 | 6047 days | 19% |
| Heckter | 7/10 | 6185 days | 17% |
| Jennifer Baulch | 9/10 | 6190 days | 19% |
| Nancy Dol | 7/10 | 6211 days | 17% |
| David Buckley | 9/10 | 6214 days | 19% |
| Jenny Hulsebosch | 9/10 | 6242 days | 19% |
| Peter | 10/10 | 6283 days | 19% |
| bart | 6/10 | 6288 days | 14% |
| Miriam&Eva | 5/10 | 6504 days | 11% |
| Dennis | 8/10 | 6561 days | 19% |
| Arjan | 7/10 | 6575 days | 17% |
| Meyer | 9/10 | 6577 days | 19% |
| Lucy | 8/10 | 6579 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
-4.10% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 55 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 | -4.04% |
| 198 | -4.06% |
| 199 | -4.08% |
| 200 | -4.10% |
| 201 | -4.12% |
| 202 | -4.14% |
| 203 | -4.16% |
| … | … |
Balancing Adjustment
3.20% 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
82%
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.