Hi, 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
83.54%
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 | 2299 days | 66% |
| Rado Hank | 8/10 | 2628 days | 100% |
| Matthias and Adriane | 9/10 | 2883 days | 86% |
| Laure and Pascal | 9/10 | 2896 days | 86% |
| Thomas Klinting | 10/10 | 2922 days | 85% |
| Helna Saumanova | 9/10 | 2927 days | 84% |
| Danny | 7/10 | 2979 days | 76% |
| Marine Lavie | 8/10 | 3241 days | 65% |
| Cate Ronke | 8/10 | 3244 days | 65% |
| Stephan Friedrich | 9/10 | 3260 days | 64% |
| Stula Vladimir | 10/10 | 3278 days | 64% |
| Isabelle | 10/10 | 3281 days | 64% |
| Mikkel Palleson | 7/10 | 3284 days | 59% |
| Meilin | 5/10 | 3290 days | 48% |
| Sebastian and Susanna | 7/10 | 3329 days | 57% |
| Jakob Gerber | 7/10 | 3334 days | 57% |
| Marie Weber | 9/10 | 3643 days | 42% |
| Erik Hafuer | 4/10 | 3677 days | 27% |
| Caroline Jonsson | 7/10 | 3942 days | 24% |
| Jonny Ronnblom | 7/10 | 3942 days | 24% |
| Catherine Schlachter | 9/10 | 3949 days | 25% |
| Christina Perez | 8/10 | 3949 days | 24% |
| Bea Westkam | 10/10 | 3958 days | 24% |
| Julia Moellers | 8/10 | 3958 days | 24% |
| Anne Haenchen | 8/10 | 3974 days | 23% |
| Kathi | 8/10 | 3974 days | 23% |
| Sophia | 7/10 | 3991 days | 21% |
| Lukas | 6/10 | 4000 days | 19% |
| Celine Darde | 8/10 | 4014 days | 21% |
| Ludovic Denee | 8/10 | 4014 days | 21% |
| Melanie Pretzel | 8/10 | 4341 days | 2% |
| Frederic Birke | 8/10 | 4341 days | 2% |
| Andre and Marina | 2/10 | 4372 days | 0% |
| Hanneke P | 7/10 | 4398 days | 28% |
| Joroen Borkert | 9/10 | 4416 days | 29% |
| Roux | 8/10 | 4419 days | 29% |
| Leo | 9/10 | 4433 days | 29% |
| Lutz Huuemorder | 8/10 | 4435 days | 29% |
| Henzen | 8/10 | 4438 days | 29% |
| Tuedi Muggli | 10/10 | 4701 days | 30% |
| Romla | 8/10 | 4711 days | 29% |
| Ronald Veldman | 8/10 | 4711 days | 29% |
| Richard | 8/10 | 4714 days | 29% |
| Marie Dutron | 6/10 | 4714 days | 25% |
| Carl & Desiree Potter | 9/10 | 4716 days | 29% |
| Frans | 10/10 | 4716 days | 30% |
| Preben vil Helmsen | 10/10 | 4716 days | 30% |
| Johann Maier | 10/10 | 4717 days | 30% |
| Gillian MacLaren | 8/10 | 4718 days | 29% |
| Eline Vakentijn | 8/10 | 4718 days | 29% |
| Langerak | 9/10 | 4720 days | 29% |
| Magda Savels | 8/10 | 4726 days | 29% |
| Roger ter Horst | 9/10 | 4728 days | 29% |
| Maria Dietrich | 9/10 | 4728 days | 29% |
| Samplonius | 8/10 | 4728 days | 29% |
| Manuela Zimmerti | 9/10 | 4796 days | 29% |
| Dirk Faupel | 9/10 | 4799 days | 29% |
| Dirk Faupel | 9/10 | 4799 days | 29% |
| Robert Carswell | 7/10 | 4801 days | 28% |
| Marc & Pauline | 8/10 | 4801 days | 29% |
| Gerard Crothers | 10/10 | 4802 days | 30% |
| Steve Eley | 7/10 | 4804 days | 28% |
| van Rees | 8/10 | 4804 days | 29% |
| Ron & Hannah de Reuver | 9/10 | 4809 days | 29% |
| Wolfgang Goggel | 9/10 | 4809 days | 29% |
| Gary A | 7/10 | 4825 days | 28% |
| Tina | 9/10 | 4825 days | 29% |
| Jon_and_Family | 8/10 | 5039 days | 29% |
| Franzi & Tobi | 9/10 | 5050 days | 29% |
| Oliver Berg | 7/10 | 5053 days | 28% |
| Marianne Wheatley | 10/10 | 5058 days | 30% |
| Krabbe | 8/10 | 5061 days | 29% |
| Rolf | 4/10 | 5061 days | 19% |
| Malcolm Jones | 8/10 | 5063 days | 29% |
| Berger | 8/10 | 5074 days | 29% |
| Pieter | 9/10 | 5075 days | 29% |
| mr Schumader | 9/10 | 5084 days | 29% |
| Tamlin Barton | 6/10 | 5085 days | 25% |
| Tim Van Nispen | 8/10 | 5086 days | 29% |
| Johanna | 6/10 | 5087 days | 25% |
| Eva Stauderova | 10/10 | 5089 days | 30% |
| Patrick Decoster | 9/10 | 5091 days | 29% |
| Liz Dolman | 8/10 | 5093 days | 29% |
| Kay and Colin Yendole | 9/10 | 5094 days | 29% |
| Chamton | 6/10 | 5098 days | 25% |
| willsworthy | 9/10 | 5190 days | 29% |
| allesca | 8/10 | 5221 days | 29% |
| Bergemann | 8/10 | 5421 days | 29% |
| Silke Seemann | 9/10 | 5426 days | 29% |
| John Harrison | 8/10 | 5442 days | 29% |
| Tanja Haring | 9/10 | 5448 days | 29% |
| Amanda Hoff | 10/10 | 5463 days | 30% |
| Beute Jacob | 8/10 | 5476 days | 29% |
| Alies van der plank | 8/10 | 5480 days | 29% |
| mariekef | 10/10 | 5509 days | 30% |
| sanneb1 | 8/10 | 5510 days | 29% |
| keane | 7/10 | 5510 days | 28% |
| mariak | 8/10 | 5511 days | 29% |
| usigmund | 8/10 | 5514 days | 29% |
| hofstetterf | 10/10 | 5523 days | 30% |
| Stefan Lua | 10/10 | 5527 days | 30% |
| Peter Essink | 9/10 | 5527 days | 29% |
| Wolfgang Mages | 10/10 | 5529 days | 30% |
| Ann S | 10/10 | 5533 days | 30% |
| Roeder Grit | 8/10 | 5536 days | 29% |
| ulrichk | 10/10 | 5642 days | 30% |
| gerrys | 7/10 | 5724 days | 28% |
| RolandV | 10/10 | 5753 days | 30% |
| GemmaC | 8/10 | 5758 days | 29% |
| CeesVanW | 8/10 | 5766 days | 29% |
| LaurensD | 7/10 | 5769 days | 28% |
| StefanieA | 10/10 | 5771 days | 30% |
| Hendrik Flier | 7/10 | 5775 days | 28% |
| PBouwmessten | 9/10 | 5789 days | 29% |
| MauzcoV | 9/10 | 5789 days | 29% |
| marcusr | 9/10 | 5811 days | 29% |
| Eugene | 10/10 | 5811 days | 30% |
| Tony | 10/10 | 5817 days | 30% |
| Ian S | 9/10 | 5818 days | 29% |
| Miguel | 9/10 | 5820 days | 29% |
| Thamar | 8/10 | 5834 days | 29% |
| Andie | 10/10 | 5841 days | 30% |
| Miranda | 8/10 | 5846 days | 29% |
| Miha | 10/10 | 5874 days | 30% |
| Gerits | 10/10 | 5882 days | 30% |
| Sluijs | 10/10 | 5886 days | 30% |
| olland | 10/10 | 5890 days | 30% |
| Liz | 10/10 | 5909 days | 30% |
| Stefan | 9/10 | 5933 days | 29% |
| Cory Fusco | 8/10 | 5994 days | 29% |
| Katie Wise | 10/10 | 6002 days | 30% |
| Heckter | 7/10 | 6140 days | 28% |
| Jennifer Baulch | 9/10 | 6145 days | 29% |
| Nancy Dol | 7/10 | 6166 days | 28% |
| David Buckley | 9/10 | 6169 days | 29% |
| Jenny Hulsebosch | 9/10 | 6197 days | 29% |
| Peter | 10/10 | 6238 days | 30% |
| bart | 6/10 | 6243 days | 25% |
| Miriam&Eva | 5/10 | 6459 days | 23% |
| Dennis | 8/10 | 6516 days | 29% |
| Arjan | 7/10 | 6530 days | 28% |
| Meyer | 9/10 | 6532 days | 29% |
| Lucy | 8/10 | 6534 days | 29% |
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
-4.08% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 46 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 | -4.02% |
| 198 | -4.04% |
| 199 | -4.06% |
| 200 | -4.08% |
| 201 | -4.10% |
| 202 | -4.12% |
| 203 | -4.15% |
| … | … |
Balancing Adjustment
3.15% 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.