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 White Island Tours.
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.
White Island Tours
Valid Reviews
129 Valid Reviews
The White Island Tours experience has a total of 129 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 129 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 48 |
|
37% |
| 9/10 | 42 |
|
33% |
| 8/10 | 19 |
|
15% |
| 7/10 | 17 |
|
13% |
| 6/10 | 0 |
|
0% |
| 5/10 | 1 |
|
1% |
| 4/10 | 1 |
|
1% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 1 |
|
1% |
88.29% Average
The raw data average (mean) for all the White Island Tours valid reviews is 88.29% and is based on 129 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
105 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 129 valid reviews, the experience has 105 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 105 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 34 |
|
32% |
| 9/10 | 35 |
|
33% |
| 8/10 | 18 |
|
17% |
| 7/10 | 16 |
|
15% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 1 |
|
1% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 1 |
|
1% |
87.24% Average
The raw data average (mean) for all the White Island Tours face-to-face reviews is 87.24% and is based on 105 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
91.86%
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 |
|---|---|---|---|---|---|
| Matthew Mutimer | 10/10 | 22 days | 99.92 | 100% | |
| Amanda Walden | 10/10 | 905 days | 10.72 | 11% | |
| Monique Pos | 9/10 | 995 days | 6.58 | 7% | |
| Alison Egan-Jones | 9/10 | 1025 days | 5.78 | 6% | |
| Sylvain Schiber | 9/10 | 1026 days | 5.75 | 6% | |
| Sylvain Chanton | 10/10 | 1031 days |  |
5.65 | 6% |
| Julian Gury | 8/10 | 1039 days | |
5.22 | 5% |
| R. Damen | 9/10 | 1056 days | 5.24 | 5% | |
| Michelle Smit | 10/10 | 1117 days | 4.97 | 5% | |
| Gesa Roemer | 8/10 | 1247 days | |
4.53 | 5% |
| Anais Roux | 10/10 | 1252 days | |
4.76 | 5% |
| Luca Staudt | 8/10 | 1271 days | |
4.5 | 4% |
| Florian Bisault | 7/10 | 1272 days | |
4.3 | 4% |
| Anna Jungclaus | 9/10 | 1279 days | |
4.72 | 5% |
| Signe Broedbaek | 7/10 | 1281 days | |
4.29 | 4% |
| Petra Fragner | 10/10 | 1287 days | |
4.71 | 5% |
| Koehler Ute | 10/10 | 1299 days | 4.69 | 5% | |
| Niclas Ullno | 8/10 | 1302 days | |
4.45 | 4% |
| Tamara | 7/10 | 1303 days | |
4.26 | 4% |
| Chloe Guerillot | 9/10 | 1313 days | |
4.67 | 5% |
| Luisa and Hannes | 9/10 | 1326 days | |
4.65 | 5% |
| elena salimzhanova | 10/10 | 1330 days | 4.64 | 5% | |
| Jakub Trojanek | 8/10 | 1341 days | |
4.39 | 4% |
| Malina | 10/10 | 1347 days | |
4.62 | 5% |
| Emma Keegan | 7/10 | 1605 days | 3.84 | 4% | |
| Emilie Normand | 7/10 | 1676 days | |
3.75 | 4% |
| Christopher Buch Madsen | 8/10 | 1997 days | |
3.45 | 3% |
| Phil Bromby | 9/10 | 1999 days | |
3.62 | 4% |
| Tobias Thull | 7/10 | 2005 days | |
3.29 | 3% |
| Rita Hochstiasser | 8/10 | 2027 days | |
3.4 | 3% |
| Nelle Dutilleur | 10/10 | 2048 days | |
3.55 | 4% |
| Mathias Butterlin | 8/10 | 2048 days | |
3.37 | 3% |
| Daryl | 8/10 | 2056 days | |
3.36 | 3% |
| Bert Pubeg | 9/10 | 2122 days | 3.44 | 3% | |
| Alex | 8/10 | 2426 days | 2.83 | 3% | |
| Lucie | 9/10 | 2462 days | |
2.92 | 3% |
| Henzen | 9/10 | 2466 days | |
2.91 | 3% |
| Roy Barton | 9/10 | 2729 days | |
2.51 | 3% |
| Brian Livesey | 9/10 | 2737 days | |
2.5 | 3% |
| Merlyn | 8/10 | 2745 days | |
2.36 | 2% |
| Beyeler | 10/10 | 2749 days | |
2.48 | 2% |
| Ralf Glaser | 7/10 | 2749 days | |
2.26 | 2% |
| Suzanne van Kol | 8/10 | 2754 days | |
2.35 | 2% |
| kiwifrenchy | 10/10 | 2761 days | 2.46 | 2% | |
| _mel_ | 9/10 | 2792 days | 2.42 | 2% | |
| C | 10/10 | 2792 days | 2.42 | 2% | |
| Sarah and Soren | 10/10 | 2829 days | |
2.36 | 2% |
| Erik Folkersen | 10/10 | 2837 days | |
2.35 | 2% |
| Rudlinger | 10/10 | 2840 days | |
2.34 | 2% |
| GenH | 10/10 | 3067 days | 2.0 | 2% | |
| R Tearle | 10/10 | 3076 days | |
1.98 | 2% |
| Franzi & Tobi | 10/10 | 3078 days | |
1.98 | 2% |
| Nathalie | 10/10 | 3082 days | |
1.98 | 2% |
| Ven | 9/10 | 3084 days | |
1.97 | 2% |
| Jerven and Kim | 10/10 | 3091 days | |
1.96 | 2% |
| Sarah Luijckx | 1/10 | 3093 days | |
1.43 | 1% |
| Alan Jeffery | 7/10 | 3094 days | |
1.78 | 2% |
| Birgette Weiner | 9/10 | 3112 days | |
1.93 | 2% |
| Tim Van Nispen | 9/10 | 3114 days | |
1.93 | 2% |
| Bottcher | 10/10 | 3114 days | |
1.93 | 2% |
| Sue & Graham Mullin | 10/10 | 3121 days | |
1.92 | 2% |
| John Simpson | 9/10 | 3123 days | |
1.91 | 2% |
| Karen Phillips | 9/10 | 3123 days | |
1.91 | 2% |
| Michelle Booty | 8/10 | 3125 days | |
1.81 | 2% |
| Nadia Husain | 7/10 | 3126 days | |
1.74 | 2% |
| Dietmar Gans | 10/10 | 3432 days | 1.44 | 1% | |
| Matt Roper | 10/10 | 3454 days | |
1.41 | 1% |
| Chris Glasg | 10/10 | 3471 days | |
1.38 | 1% |
| Jamie Hallifax | 9/10 | 3482 days | |
1.37 | 1% |
| Paul Ritchie | 10/10 | 3486 days | |
1.36 | 1% |
| Gerry Donoghue | 10/10 | 3505 days | |
1.33 | 1% |
| Yvonne German | 9/10 | 3508 days | |
1.33 | 1% |
| DebbieM | 5/10 | 3522 days | 1.06 | 1% | |
| mj111 | 10/10 | 3522 days | 1.31 | 1% | |
| Susann Koschmeider | 10/10 | 3557 days | |
1.25 | 1% |
| X Otte | 10/10 | 3561 days | |
1.25 | 1% |
| Hans Hoff | 10/10 | 3561 days | |
1.25 | 1% |
| Solveig Mosinski | 10/10 | 3565 days | |
1.24 | 1% |
| Val and Barnie Weir | 10/10 | 3576 days | |
1.22 | 1% |
| Wim Put | 9/10 | 3579 days | |
1.22 | 1% |
| discerner | 10/10 | 3583 days | 1.21 | 1% | |
| Phillip Reade | 10/10 | 3583 days | 1.21 | 1% | |
| Tim Beuzeval | 9/10 | 3583 days | |
1.21 | 1% |
| barp | 9/10 | 3614 days | |
1.17 | 1% |
| Becky Fairweather | 10/10 | 3767 days | 0.93 | 1% | |
| David | 10/10 | 3797 days | 0.89 | 1% | |
| martinat | 10/10 | 3797 days | |
0.89 | 1% |
| Mike | 9/10 | 3806 days | |
0.87 | 1% |
| MichaelS1 | 9/10 | 3813 days | |
0.86 | 1% |
| StefanieGermany | 9/10 | 3814 days | |
0.86 | 1% |
| Veronika | 9/10 | 3816 days | |
0.86 | 1% |
| Ralph Boese | 7/10 | 3817 days | |
0.78 | 1% |
| ToyalFrance | 9/10 | 3817 days | |
0.86 | 1% |
| ReneeA | 9/10 | 3845 days | |
0.81 | 1% |
| Lorna | 8/10 | 3846 days | |
0.77 | 1% |
| Bruce | 10/10 | 3847 days | |
0.81 | 1% |
| Sandra | 10/10 | 3854 days | |
0.8 | 1% |
| Heidi | 7/10 | 3861 days | |
0.72 | 1% |
| Philipp | 9/10 | 3861 days | |
0.79 | 1% |
| Simon | 9/10 | 3863 days | |
0.79 | 1% |
| Kathryn | 8/10 | 3864 days | |
0.75 | 1% |
| Barbara | 9/10 | 3869 days | |
0.78 | 1% |
| Joachim | 10/10 | 3869 days | |
0.78 | 1% |
| Ans | 7/10 | 3870 days | |
0.71 | 1% |
| Minder | 10/10 | 3871 days | |
0.77 | 1% |
| Evi | 7/10 | 3902 days | |
0.66 | 1% |
| Ann Maree | 9/10 | 3905 days | 0.72 | 1% | |
| Trine | 9/10 | 3915 days | |
0.71 | 1% |
| Carina Korn | 10/10 | 4012 days | |
0.56 | 1% |
| Christian | 7/10 | 4012 days | |
0.51 | 1% |
| Nick | 10/10 | 4015 days | |
0.56 | 1% |
| Terri Scott | 7/10 | 4032 days | |
0.48 | 0% |
| Alan Bellerby | 10/10 | 4183 days | |
0.3 | 0% |
| Robert | 4/10 | 4189 days | |
0.23 | 0% |
| Elise | 10/10 | 4189 days | |
0.29 | 0% |
| Fung | 8/10 | 4189 days | |
0.28 | 0% |
| Peter Aston | 9/10 | 4189 days | |
0.29 | 0% |
| Tony Wicks | 8/10 | 4194 days | |
0.27 | 0% |
| Sue | 8/10 | 4201 days | |
0.26 | 0% |
| Carla | 9/10 | 4209 days | |
0.26 | 0% |
| Melissa Steedman | 9/10 | 4236 days | |
0.22 | 0% |
| Vanessa Brennan | 7/10 | 4236 days | |
0.2 | 0% |
| Tim | 9/10 | 4237 days | |
0.22 | 0% |
| Mary | 10/10 | 4287 days | |
0.14 | 0% |
| Agnes | 9/10 | 4503 days | |
0.0 | 0% |
| Cohen | 9/10 | 4523 days | |
0.0 | 0% |
| John | 8/10 | 4527 days | |
0.0 | 0% |
| SueLinsk | 9/10 | 4527 days | |
0.0 | 0% |
| Frauke | 7/10 | 4569 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 White Island Tours experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-0.24% Adjustment
There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the White Island Tours 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 White Island Tours experience has been adjusted for 12 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 9 | -0.18% |
| 10 | -0.20% |
| 11 | -0.22% |
| 12 | -0.24% |
| 13 | -0.26% |
| 14 | -0.28% |
| 15 | -0.30% |
| … | … |
Final Ranking Score
92%
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.