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
70.53%
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 | Face-to-Face | Weight | Relative Weight |
|---|---|---|---|---|---|
| Dave | 3/10 | 409 days | 56.59 | 100% | |
| Rado Hank | 8/10 | 738 days |  |
23.94 | 42% |
| Matthias and Adriane | 9/10 | 993 days | |
6.65 | 12% |
| Laure and Pascal | 9/10 | 1006 days | |
6.26 | 11% |
| Thomas Klinting | 10/10 | 1032 days | |
5.63 | 10% |
| Helna Saumanova | 9/10 | 1037 days | |
5.53 | 10% |
| Danny | 7/10 | 1089 days | |
4.56 | 8% |
| Marine Lavie | 8/10 | 1351 days | |
4.27 | 8% |
| Cate Ronke | 8/10 | 1354 days | |
4.27 | 8% |
| Stephan Friedrich | 9/10 | 1370 days | 4.46 | 8% | |
| Stula Vladimir | 10/10 | 1388 days | |
4.43 | 8% |
| Isabelle | 10/10 | 1391 days | |
4.42 | 8% |
| Mikkel Palleson | 7/10 | 1394 days | |
4.02 | 7% |
| Meilin | 5/10 | 1400 days | |
3.57 | 6% |
| Sebastian and Susanna | 7/10 | 1439 days | |
3.94 | 7% |
| Jakob Gerber | 7/10 | 1444 days | 3.93 | 7% | |
| Marie Weber | 9/10 | 1753 days | |
3.71 | 7% |
| Erik Hafuer | 4/10 | 1787 days | |
2.88 | 5% |
| Caroline Jonsson | 7/10 | 2052 days | |
2.85 | 5% |
| Jonny Ronnblom | 7/10 | 2052 days | |
2.85 | 5% |
| Catherine Schlachter | 9/10 | 2059 days | |
3.11 | 6% |
| Christina Perez | 8/10 | 2059 days | |
2.96 | 5% |
| Bea Westkam | 10/10 | 2068 days | |
3.1 | 5% |
| Julia Moellers | 8/10 | 2068 days | |
2.94 | 5% |
| Anne Haenchen | 8/10 | 2084 days | |
2.91 | 5% |
| Kathi | 8/10 | 2084 days | |
2.91 | 5% |
| Sophia | 7/10 | 2101 days | |
2.76 | 5% |
| Lukas | 6/10 | 2110 days | |
2.5 | 4% |
| Celine Darde | 8/10 | 2124 days | |
2.84 | 5% |
| Ludovic Denee | 8/10 | 2124 days | |
2.84 | 5% |
| Melanie Pretzel | 8/10 | 2451 days | |
2.23 | 4% |
| Frederic Birke | 8/10 | 2451 days | |
2.23 | 4% |
| Andre and Marina | 2/10 | 2482 days | |
1.71 | 3% |
| Hanneke P | 7/10 | 2508 days | 2.03 | 4% | |
| Joroen Borkert | 9/10 | 2526 days | |
2.2 | 4% |
| Roux | 8/10 | 2529 days | |
2.08 | 4% |
| Leo | 9/10 | 2543 days | |
2.17 | 4% |
| Lutz Huuemorder | 8/10 | 2545 days | |
2.05 | 4% |
| Henzen | 8/10 | 2548 days | |
2.05 | 4% |
| Tuedi Muggli | 10/10 | 2811 days | |
1.64 | 3% |
| Romla | 8/10 | 2821 days | |
1.54 | 3% |
| Ronald Veldman | 8/10 | 2821 days | |
1.54 | 3% |
| Richard | 8/10 | 2824 days | |
1.54 | 3% |
| Marie Dutron | 6/10 | 2824 days | |
1.34 | 2% |
| Carl & Desiree Potter | 9/10 | 2826 days | |
1.61 | 3% |
| Frans | 10/10 | 2826 days | |
1.61 | 3% |
| Preben vil Helmsen | 10/10 | 2826 days | |
1.61 | 3% |
| Johann Maier | 10/10 | 2827 days | |
1.61 | 3% |
| Gillian MacLaren | 8/10 | 2828 days | |
1.53 | 3% |
| Eline Vakentijn | 8/10 | 2828 days | |
1.53 | 3% |
| Langerak | 9/10 | 2830 days | |
1.6 | 3% |
| Magda Savels | 8/10 | 2836 days | |
1.51 | 3% |
| Roger ter Horst | 9/10 | 2838 days | |
1.59 | 3% |
| Maria Dietrich | 9/10 | 2838 days | |
1.59 | 3% |
| Samplonius | 8/10 | 2838 days | |
1.51 | 3% |
| Manuela Zimmerti | 9/10 | 2906 days | |
1.46 | 3% |
| Dirk Faupel | 9/10 | 2909 days | |
1.45 | 3% |
| Dirk Faupel | 9/10 | 2909 days | |
1.45 | 3% |
| Robert Carswell | 7/10 | 2911 days | |
1.32 | 2% |
| Marc & Pauline | 8/10 | 2911 days | |
1.37 | 2% |
| Gerard Crothers | 10/10 | 2912 days | |
1.44 | 3% |
| Steve Eley | 7/10 | 2914 days | |
1.31 | 2% |
| van Rees | 8/10 | 2914 days | |
1.37 | 2% |
| Ron & Hannah de Reuver | 9/10 | 2919 days | |
1.43 | 3% |
| Wolfgang Goggel | 9/10 | 2919 days | |
1.43 | 3% |
| Gary A | 7/10 | 2935 days | |
1.27 | 2% |
| Tina | 9/10 | 2935 days | |
1.4 | 2% |
| Jon_and_Family | 8/10 | 3149 days | 0.93 | 2% | |
| Franzi & Tobi | 9/10 | 3160 days | |
0.96 | 2% |
| Oliver Berg | 7/10 | 3163 days | |
0.87 | 2% |
| Marianne Wheatley | 10/10 | 3168 days | |
0.94 | 2% |
| Krabbe | 8/10 | 3171 days | |
0.89 | 2% |
| Rolf | 4/10 | 3171 days | |
0.74 | 1% |
| Malcolm Jones | 8/10 | 3173 days | |
0.89 | 2% |
| Berger | 8/10 | 3184 days | |
0.87 | 2% |
| Pieter | 9/10 | 3185 days | |
0.91 | 2% |
| mr Schumader | 9/10 | 3194 days | |
0.89 | 2% |
| Tamlin Barton | 6/10 | 3195 days | |
0.74 | 1% |
| Tim Van Nispen | 8/10 | 3196 days | |
0.84 | 1% |
| Johanna | 6/10 | 3197 days | |
0.74 | 1% |
| Eva Stauderova | 10/10 | 3199 days | |
0.88 | 2% |
| Patrick Decoster | 9/10 | 3201 days | |
0.88 | 2% |
| Liz Dolman | 8/10 | 3203 days | |
0.83 | 1% |
| Kay and Colin Yendole | 9/10 | 3204 days | |
0.87 | 2% |
| Chamton | 6/10 | 3208 days | |
0.72 | 1% |
| willsworthy | 9/10 | 3300 days | 0.68 | 1% | |
| allesca | 8/10 | 3331 days | 0.59 | 1% | |
| Bergemann | 8/10 | 3531 days | |
0.22 | 0% |
| Silke Seemann | 9/10 | 3536 days | |
0.22 | 0% |
| John Harrison | 8/10 | 3552 days | |
0.18 | 0% |
| Tanja Haring | 9/10 | 3558 days | |
0.18 | 0% |
| Amanda Hoff | 10/10 | 3573 days | 0.15 | 0% | |
| Beute Jacob | 8/10 | 3586 days | |
0.12 | 0% |
| Alies van der plank | 8/10 | 3590 days | |
0.11 | 0% |
| mariekef | 10/10 | 3619 days | |
0.06 | 0% |
| sanneb1 | 8/10 | 3620 days | |
0.06 | 0% |
| keane | 7/10 | 3620 days | |
0.05 | 0% |
| mariak | 8/10 | 3621 days | |
0.05 | 0% |
| usigmund | 8/10 | 3624 days | |
0.05 | 0% |
| hofstetterf | 10/10 | 3633 days | |
0.03 | 0% |
| Stefan Lua | 10/10 | 3637 days | |
0.03 | 0% |
| Peter Essink | 9/10 | 3637 days | |
0.03 | 0% |
| Wolfgang Mages | 10/10 | 3639 days | |
0.02 | 0% |
| Ann S | 10/10 | 3643 days | |
0.01 | 0% |
| Roeder Grit | 8/10 | 3646 days | |
0.01 | 0% |
| ulrichk | 10/10 | 3752 days | |
0.0 | 0% |
| gerrys | 7/10 | 3834 days | |
0.0 | 0% |
| RolandV | 10/10 | 3863 days | |
0.0 | 0% |
| GemmaC | 8/10 | 3868 days | |
0.0 | 0% |
| CeesVanW | 8/10 | 3876 days | |
0.0 | 0% |
| LaurensD | 7/10 | 3879 days | |
0.0 | 0% |
| StefanieA | 10/10 | 3881 days | |
0.0 | 0% |
| Hendrik Flier | 7/10 | 3885 days | |
0.0 | 0% |
| PBouwmessten | 9/10 | 3899 days | |
0.0 | 0% |
| MauzcoV | 9/10 | 3899 days | |
0.0 | 0% |
| marcusr | 9/10 | 3921 days | |
0.0 | 0% |
| Eugene | 10/10 | 3921 days | |
0.0 | 0% |
| Tony | 10/10 | 3928 days | |
0.0 | 0% |
| Ian S | 9/10 | 3929 days | |
0.0 | 0% |
| Miguel | 9/10 | 3930 days | |
0.0 | 0% |
| Thamar | 8/10 | 3944 days | |
0.0 | 0% |
| Andie | 10/10 | 3952 days | |
0.0 | 0% |
| Miranda | 8/10 | 3956 days | |
0.0 | 0% |
| Miha | 10/10 | 3984 days | |
0.0 | 0% |
| Gerits | 10/10 | 3992 days | |
0.0 | 0% |
| Sluijs | 10/10 | 3997 days | |
0.0 | 0% |
| olland | 10/10 | 4000 days | |
0.0 | 0% |
| Liz | 10/10 | 4019 days | |
0.0 | 0% |
| Stefan | 9/10 | 4043 days | |
0.0 | 0% |
| Cory Fusco | 8/10 | 4104 days | |
0.0 | 0% |
| Katie Wise | 10/10 | 4112 days | |
0.0 | 0% |
| Heckter | 7/10 | 4250 days | |
0.0 | 0% |
| Jennifer Baulch | 9/10 | 4255 days | |
0.0 | 0% |
| Nancy Dol | 7/10 | 4276 days | |
0.0 | 0% |
| David Buckley | 9/10 | 4279 days | |
0.0 | 0% |
| Jenny Hulsebosch | 9/10 | 4307 days | |
0.0 | 0% |
| Peter | 10/10 | 4348 days | |
0.0 | 0% |
| bart | 6/10 | 4353 days | |
0.0 | 0% |
| Miriam&Eva | 5/10 | 4569 days | |
0.0 | 0% |
| Dennis | 8/10 | 4626 days | |
0.0 | 0% |
| Arjan | 7/10 | 4640 days | |
0.0 | 0% |
| Meyer | 9/10 | 4642 days | |
0.0 | 0% |
| Lucy | 8/10 | 4644 days | |
0.0 | 0% |
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
-3.98% Adjustment
There may be an adjustment if an experience hasn't received any reviews within the last 60 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 199 days.
The Waimangu Volcanic Valley experience has been adjusted for 199 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 196 | -3.92% |
| 197 | -3.94% |
| 198 | -3.96% |
| 199 | -3.98% |
| 200 | -4.00% |
| 201 | -4.02% |
| 202 | -4.04% |
| … | … |
Final Ranking Score
67%
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.