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
72.67%
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 | 357 days | 61.45 | 100% | |
| Rado Hank | 8/10 | 686 days |  |
29.93 | 49% |
| Matthias and Adriane | 9/10 | 941 days | |
8.76 | 14% |
| Laure and Pascal | 9/10 | 954 days | |
8.15 | 13% |
| Thomas Klinting | 10/10 | 980 days | |
7.1 | 12% |
| Helna Saumanova | 9/10 | 985 days | |
6.92 | 11% |
| Danny | 7/10 | 1037 days | |
5.04 | 8% |
| Marine Lavie | 8/10 | 1299 days | |
4.42 | 7% |
| Cate Ronke | 8/10 | 1302 days | |
4.41 | 7% |
| Stephan Friedrich | 9/10 | 1318 days | 4.62 | 8% | |
| Stula Vladimir | 10/10 | 1336 days | |
4.59 | 7% |
| Isabelle | 10/10 | 1339 days | |
4.58 | 7% |
| Mikkel Palleson | 7/10 | 1342 days | |
4.17 | 7% |
| Meilin | 5/10 | 1348 days | |
3.7 | 6% |
| Sebastian and Susanna | 7/10 | 1387 days | |
4.1 | 7% |
| Jakob Gerber | 7/10 | 1392 days | 4.09 | 7% | |
| Marie Weber | 9/10 | 1701 days | |
3.96 | 6% |
| Erik Hafuer | 4/10 | 1735 days | |
3.08 | 5% |
| Caroline Jonsson | 7/10 | 2000 days | |
3.14 | 5% |
| Jonny Ronnblom | 7/10 | 2000 days | |
3.14 | 5% |
| Catherine Schlachter | 9/10 | 2007 days | |
3.44 | 6% |
| Christina Perez | 8/10 | 2007 days | |
3.27 | 5% |
| Bea Westkam | 10/10 | 2016 days | |
3.42 | 6% |
| Julia Moellers | 8/10 | 2016 days | |
3.25 | 5% |
| Anne Haenchen | 8/10 | 2032 days | |
3.23 | 5% |
| Kathi | 8/10 | 2032 days | |
3.23 | 5% |
| Sophia | 7/10 | 2049 days | |
3.06 | 5% |
| Lukas | 6/10 | 2058 days | |
2.78 | 5% |
| Celine Darde | 8/10 | 2072 days | |
3.16 | 5% |
| Ludovic Denee | 8/10 | 2072 days | |
3.16 | 5% |
| Melanie Pretzel | 8/10 | 2399 days | |
2.63 | 4% |
| Frederic Birke | 8/10 | 2399 days | |
2.63 | 4% |
| Andre and Marina | 2/10 | 2430 days | |
2.04 | 3% |
| Hanneke P | 7/10 | 2456 days | 2.43 | 4% | |
| Joroen Borkert | 9/10 | 2474 days | |
2.64 | 4% |
| Roux | 8/10 | 2477 days | |
2.5 | 4% |
| Leo | 9/10 | 2491 days | |
2.61 | 4% |
| Lutz Huuemorder | 8/10 | 2493 days | |
2.48 | 4% |
| Henzen | 8/10 | 2496 days | |
2.47 | 4% |
| Tuedi Muggli | 10/10 | 2759 days | |
2.15 | 3% |
| Romla | 8/10 | 2769 days | |
2.03 | 3% |
| Ronald Veldman | 8/10 | 2769 days | |
2.03 | 3% |
| Richard | 8/10 | 2772 days | |
2.02 | 3% |
| Marie Dutron | 6/10 | 2772 days | |
1.77 | 3% |
| Carl & Desiree Potter | 9/10 | 2774 days | |
2.13 | 3% |
| Frans | 10/10 | 2774 days | |
2.13 | 3% |
| Preben vil Helmsen | 10/10 | 2774 days | |
2.13 | 3% |
| Johann Maier | 10/10 | 2775 days | |
2.12 | 3% |
| Gillian MacLaren | 8/10 | 2776 days | |
2.02 | 3% |
| Eline Vakentijn | 8/10 | 2776 days | |
2.02 | 3% |
| Langerak | 9/10 | 2778 days | |
2.12 | 3% |
| Magda Savels | 8/10 | 2784 days | |
2.0 | 3% |
| Roger ter Horst | 9/10 | 2786 days | |
2.1 | 3% |
| Maria Dietrich | 9/10 | 2786 days | |
2.1 | 3% |
| Samplonius | 8/10 | 2786 days | |
2.0 | 3% |
| Manuela Zimmerti | 9/10 | 2854 days | |
1.99 | 3% |
| Dirk Faupel | 9/10 | 2857 days | |
1.98 | 3% |
| Dirk Faupel | 9/10 | 2857 days | |
1.98 | 3% |
| Robert Carswell | 7/10 | 2859 days | |
1.8 | 3% |
| Marc & Pauline | 8/10 | 2859 days | |
1.88 | 3% |
| Gerard Crothers | 10/10 | 2860 days | |
1.98 | 3% |
| Steve Eley | 7/10 | 2862 days | |
1.8 | 3% |
| van Rees | 8/10 | 2862 days | |
1.88 | 3% |
| Ron & Hannah de Reuver | 9/10 | 2867 days | |
1.97 | 3% |
| Wolfgang Goggel | 9/10 | 2867 days | |
1.97 | 3% |
| Gary A | 7/10 | 2883 days | |
1.76 | 3% |
| Tina | 9/10 | 2883 days | |
1.94 | 3% |
| Jon_and_Family | 8/10 | 3097 days | 1.49 | 2% | |
| Franzi & Tobi | 9/10 | 3108 days | |
1.55 | 3% |
| Oliver Berg | 7/10 | 3111 days | |
1.41 | 2% |
| Marianne Wheatley | 10/10 | 3116 days | |
1.54 | 3% |
| Krabbe | 8/10 | 3119 days | |
1.46 | 2% |
| Rolf | 4/10 | 3119 days | |
1.21 | 2% |
| Malcolm Jones | 8/10 | 3121 days | |
1.45 | 2% |
| Berger | 8/10 | 3132 days | |
1.44 | 2% |
| Pieter | 9/10 | 3133 days | |
1.51 | 2% |
| mr Schumader | 9/10 | 3142 days | |
1.49 | 2% |
| Tamlin Barton | 6/10 | 3143 days | |
1.24 | 2% |
| Tim Van Nispen | 8/10 | 3144 days | |
1.42 | 2% |
| Johanna | 6/10 | 3145 days | |
1.24 | 2% |
| Eva Stauderova | 10/10 | 3147 days | |
1.49 | 2% |
| Patrick Decoster | 9/10 | 3149 days | |
1.48 | 2% |
| Liz Dolman | 8/10 | 3151 days | |
1.41 | 2% |
| Kay and Colin Yendole | 9/10 | 3152 days | |
1.48 | 2% |
| Chamton | 6/10 | 3156 days | |
1.22 | 2% |
| willsworthy | 9/10 | 3248 days | 1.31 | 2% | |
| allesca | 8/10 | 3279 days | 1.2 | 2% | |
| Bergemann | 8/10 | 3479 days | |
0.87 | 1% |
| Silke Seemann | 9/10 | 3484 days | |
0.91 | 1% |
| John Harrison | 8/10 | 3500 days | |
0.84 | 1% |
| Tanja Haring | 9/10 | 3506 days | |
0.87 | 1% |
| Amanda Hoff | 10/10 | 3521 days | 0.85 | 1% | |
| Beute Jacob | 8/10 | 3534 days | |
0.78 | 1% |
| Alies van der plank | 8/10 | 3538 days | |
0.78 | 1% |
| mariekef | 10/10 | 3567 days | |
0.77 | 1% |
| sanneb1 | 8/10 | 3568 days | |
0.73 | 1% |
| keane | 7/10 | 3568 days | |
0.7 | 1% |
| mariak | 8/10 | 3569 days | |
0.73 | 1% |
| usigmund | 8/10 | 3572 days | |
0.72 | 1% |
| hofstetterf | 10/10 | 3581 days | |
0.74 | 1% |
| Stefan Lua | 10/10 | 3585 days | |
0.74 | 1% |
| Peter Essink | 9/10 | 3585 days | |
0.74 | 1% |
| Wolfgang Mages | 10/10 | 3587 days | |
0.73 | 1% |
| Ann S | 10/10 | 3591 days | |
0.73 | 1% |
| Roeder Grit | 8/10 | 3594 days | |
0.68 | 1% |
| ulrichk | 10/10 | 3700 days | |
0.54 | 1% |
| gerrys | 7/10 | 3782 days | |
0.36 | 1% |
| RolandV | 10/10 | 3811 days | |
0.35 | 1% |
| GemmaC | 8/10 | 3816 days | |
0.32 | 1% |
| CeesVanW | 8/10 | 3824 days | |
0.31 | 1% |
| LaurensD | 7/10 | 3827 days | |
0.29 | 0% |
| StefanieA | 10/10 | 3829 days | |
0.32 | 1% |
| Hendrik Flier | 7/10 | 3833 days | |
0.28 | 0% |
| PBouwmessten | 9/10 | 3847 days | |
0.29 | 0% |
| MauzcoV | 9/10 | 3847 days | |
0.29 | 0% |
| marcusr | 9/10 | 3868 days | |
0.25 | 0% |
| Eugene | 10/10 | 3868 days | |
0.25 | 0% |
| Tony | 10/10 | 3875 days | |
0.24 | 0% |
| Ian S | 9/10 | 3876 days | |
0.24 | 0% |
| Miguel | 9/10 | 3877 days | |
0.24 | 0% |
| Thamar | 8/10 | 3891 days | |
0.2 | 0% |
| Andie | 10/10 | 3899 days | |
0.2 | 0% |
| Miranda | 8/10 | 3903 days | |
0.18 | 0% |
| Miha | 10/10 | 3931 days | |
0.14 | 0% |
| Gerits | 10/10 | 3939 days | |
0.13 | 0% |
| Sluijs | 10/10 | 3944 days | |
0.12 | 0% |
| olland | 10/10 | 3947 days | |
0.12 | 0% |
| Liz | 10/10 | 3966 days | |
0.08 | 0% |
| Stefan | 9/10 | 3990 days | |
0.04 | 0% |
| Cory Fusco | 8/10 | 4051 days | |
0.0 | 0% |
| Katie Wise | 10/10 | 4059 days | |
0.0 | 0% |
| Heckter | 7/10 | 4198 days | |
0.0 | 0% |
| Jennifer Baulch | 9/10 | 4203 days | |
0.0 | 0% |
| Nancy Dol | 7/10 | 4224 days | |
0.0 | 0% |
| David Buckley | 9/10 | 4227 days | |
0.0 | 0% |
| Jenny Hulsebosch | 9/10 | 4255 days | |
0.0 | 0% |
| Peter | 10/10 | 4296 days | |
0.0 | 0% |
| bart | 6/10 | 4301 days | |
0.0 | 0% |
| Miriam&Eva | 5/10 | 4517 days | |
0.0 | 0% |
| Dennis | 8/10 | 4574 days | |
0.0 | 0% |
| Arjan | 7/10 | 4588 days | |
0.0 | 0% |
| Meyer | 9/10 | 4590 days | |
0.0 | 0% |
| Lucy | 8/10 | 4592 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
69%
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.