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
92.13%
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 | 77 days | 99.06 | 100% | |
| Amanda Walden | 10/10 | 960 days | 7.89 | 8% | |
| Monique Pos | 9/10 | 1050 days | 5.32 | 5% | |
| Alison Egan-Jones | 9/10 | 1080 days | 5.04 | 5% | |
| Sylvain Schiber | 9/10 | 1080 days | 5.04 | 5% | |
| Sylvain Chanton | 10/10 | 1085 days |  |
5.02 | 5% |
| Julian Gury | 8/10 | 1093 days | |
4.75 | 5% |
| R. Damen | 9/10 | 1111 days | 4.97 | 5% | |
| Michelle Smit | 10/10 | 1172 days | 4.87 | 5% | |
| Gesa Roemer | 8/10 | 1301 days | |
4.41 | 4% |
| Anais Roux | 10/10 | 1306 days | |
4.64 | 5% |
| Luca Staudt | 8/10 | 1325 days | |
4.38 | 4% |
| Florian Bisault | 7/10 | 1326 days | |
4.19 | 4% |
| Anna Jungclaus | 9/10 | 1333 days | |
4.59 | 5% |
| Signe Broedbaek | 7/10 | 1335 days | |
4.18 | 4% |
| Petra Fragner | 10/10 | 1341 days | |
4.58 | 5% |
| Koehler Ute | 10/10 | 1354 days | 4.56 | 5% | |
| Niclas Ullno | 8/10 | 1356 days | |
4.33 | 4% |
| Tamara | 7/10 | 1357 days | |
4.14 | 4% |
| Chloe Guerillot | 9/10 | 1367 days | |
4.53 | 5% |
| Luisa and Hannes | 9/10 | 1380 days | |
4.51 | 5% |
| elena salimzhanova | 10/10 | 1385 days | 4.5 | 5% | |
| Jakub Trojanek | 8/10 | 1395 days | |
4.26 | 4% |
| Malina | 10/10 | 1401 days | |
4.48 | 5% |
| Emma Keegan | 7/10 | 1660 days | 3.67 | 4% | |
| Emilie Normand | 7/10 | 1730 days | |
3.56 | 4% |
| Christopher Buch Madsen | 8/10 | 2051 days | |
3.19 | 3% |
| Phil Bromby | 9/10 | 2053 days | |
3.36 | 3% |
| Tobias Thull | 7/10 | 2059 days | |
3.05 | 3% |
| Rita Hochstiasser | 8/10 | 2081 days | |
3.15 | 3% |
| Nelle Dutilleur | 10/10 | 2102 days | |
3.28 | 3% |
| Mathias Butterlin | 8/10 | 2102 days | |
3.11 | 3% |
| Daryl | 8/10 | 2110 days | |
3.1 | 3% |
| Bert Pubeg | 9/10 | 2176 days | 3.15 | 3% | |
| Alex | 8/10 | 2480 days | 2.5 | 3% | |
| Lucie | 9/10 | 2516 days | |
2.57 | 3% |
| Henzen | 9/10 | 2520 days | |
2.56 | 3% |
| Roy Barton | 9/10 | 2783 days | |
2.11 | 2% |
| Brian Livesey | 9/10 | 2791 days | |
2.1 | 2% |
| Merlyn | 8/10 | 2799 days | |
1.98 | 2% |
| Beyeler | 10/10 | 2803 days | |
2.08 | 2% |
| Ralf Glaser | 7/10 | 2803 days | |
1.89 | 2% |
| Suzanne van Kol | 8/10 | 2808 days | |
1.96 | 2% |
| kiwifrenchy | 10/10 | 2815 days | 2.05 | 2% | |
| _mel_ | 9/10 | 2846 days | 2.0 | 2% | |
| C | 10/10 | 2846 days | 2.0 | 2% | |
| Sarah and Soren | 10/10 | 2883 days | |
1.94 | 2% |
| Erik Folkersen | 10/10 | 2891 days | |
1.92 | 2% |
| Rudlinger | 10/10 | 2894 days | |
1.92 | 2% |
| GenH | 10/10 | 3121 days | 1.53 | 2% | |
| R Tearle | 10/10 | 3130 days | |
1.52 | 2% |
| Franzi & Tobi | 10/10 | 3132 days | |
1.51 | 2% |
| Nathalie | 10/10 | 3136 days | |
1.51 | 2% |
| Ven | 9/10 | 3138 days | |
1.5 | 2% |
| Jerven and Kim | 10/10 | 3145 days | |
1.49 | 2% |
| Sarah Luijckx | 1/10 | 3147 days | |
1.09 | 1% |
| Alan Jeffery | 7/10 | 3148 days | |
1.35 | 1% |
| Birgette Weiner | 9/10 | 3166 days | |
1.45 | 1% |
| Tim Van Nispen | 9/10 | 3168 days | |
1.45 | 1% |
| Bottcher | 10/10 | 3168 days | |
1.45 | 1% |
| Sue & Graham Mullin | 10/10 | 3175 days | |
1.44 | 1% |
| John Simpson | 9/10 | 3177 days | |
1.43 | 1% |
| Karen Phillips | 9/10 | 3177 days | |
1.43 | 1% |
| Michelle Booty | 8/10 | 3179 days | |
1.36 | 1% |
| Nadia Husain | 7/10 | 3180 days | |
1.3 | 1% |
| Dietmar Gans | 10/10 | 3486 days | 0.91 | 1% | |
| Matt Roper | 10/10 | 3508 days | |
0.87 | 1% |
| Chris Glasg | 10/10 | 3525 days | |
0.84 | 1% |
| Jamie Hallifax | 9/10 | 3536 days | |
0.82 | 1% |
| Paul Ritchie | 10/10 | 3540 days | |
0.81 | 1% |
| Gerry Donoghue | 10/10 | 3559 days | |
0.78 | 1% |
| Yvonne German | 9/10 | 3562 days | |
0.78 | 1% |
| DebbieM | 5/10 | 3576 days | 0.61 | 1% | |
| mj111 | 10/10 | 3576 days | 0.75 | 1% | |
| Susann Koschmeider | 10/10 | 3611 days | |
0.69 | 1% |
| X Otte | 10/10 | 3615 days | |
0.68 | 1% |
| Hans Hoff | 10/10 | 3615 days | |
0.68 | 1% |
| Solveig Mosinski | 10/10 | 3619 days | |
0.68 | 1% |
| Val and Barnie Weir | 10/10 | 3630 days | |
0.66 | 1% |
| Wim Put | 9/10 | 3633 days | |
0.65 | 1% |
| discerner | 10/10 | 3637 days | 0.65 | 1% | |
| Phillip Reade | 10/10 | 3637 days | 0.65 | 1% | |
| Tim Beuzeval | 9/10 | 3637 days | |
0.65 | 1% |
| barp | 9/10 | 3668 days | |
0.59 | 1% |
| Becky Fairweather | 10/10 | 3821 days | 0.33 | 0% | |
| David | 10/10 | 3851 days | 0.28 | 0% | |
| martinat | 10/10 | 3851 days | |
0.28 | 0% |
| Mike | 9/10 | 3861 days | |
0.26 | 0% |
| MichaelS1 | 9/10 | 3867 days | |
0.25 | 0% |
| StefanieGermany | 9/10 | 3869 days | |
0.25 | 0% |
| Veronika | 9/10 | 3871 days | |
0.25 | 0% |
| Ralph Boese | 7/10 | 3871 days | |
0.22 | 0% |
| ToyalFrance | 9/10 | 3871 days | |
0.25 | 0% |
| ReneeA | 9/10 | 3899 days | |
0.2 | 0% |
| Lorna | 8/10 | 3901 days | |
0.19 | 0% |
| Bruce | 10/10 | 3902 days | |
0.19 | 0% |
| Sandra | 10/10 | 3909 days | |
0.18 | 0% |
| Heidi | 7/10 | 3916 days | |
0.15 | 0% |
| Philipp | 9/10 | 3916 days | |
0.17 | 0% |
| Simon | 9/10 | 3918 days | |
0.17 | 0% |
| Kathryn | 8/10 | 3919 days | |
0.16 | 0% |
| Barbara | 9/10 | 3924 days | |
0.16 | 0% |
| Joachim | 10/10 | 3924 days | |
0.16 | 0% |
| Ans | 7/10 | 3925 days | |
0.14 | 0% |
| Minder | 10/10 | 3926 days | |
0.15 | 0% |
| Evi | 7/10 | 3957 days | |
0.09 | 0% |
| Ann Maree | 9/10 | 3960 days | 0.09 | 0% | |
| Trine | 9/10 | 3970 days | |
0.08 | 0% |
| Carina Korn | 10/10 | 4067 days | |
0.0 | 0% |
| Christian | 7/10 | 4067 days | |
0.0 | 0% |
| Nick | 10/10 | 4070 days | |
0.0 | 0% |
| Terri Scott | 7/10 | 4087 days | |
0.0 | 0% |
| Alan Bellerby | 10/10 | 4237 days | |
0.0 | 0% |
| Robert | 4/10 | 4243 days | |
0.0 | 0% |
| Elise | 10/10 | 4243 days | |
0.0 | 0% |
| Fung | 8/10 | 4243 days | |
0.0 | 0% |
| Peter Aston | 9/10 | 4243 days | |
0.0 | 0% |
| Tony Wicks | 8/10 | 4248 days | |
0.0 | 0% |
| Sue | 8/10 | 4255 days | |
0.0 | 0% |
| Carla | 9/10 | 4263 days | |
0.0 | 0% |
| Melissa Steedman | 9/10 | 4290 days | |
0.0 | 0% |
| Vanessa Brennan | 7/10 | 4290 days | |
0.0 | 0% |
| Tim | 9/10 | 4291 days | |
0.0 | 0% |
| Mary | 10/10 | 4341 days | |
0.0 | 0% |
| Agnes | 9/10 | 4557 days | |
0.0 | 0% |
| Cohen | 9/10 | 4577 days | |
0.0 | 0% |
| John | 8/10 | 4581 days | |
0.0 | 0% |
| SueLinsk | 9/10 | 4581 days | |
0.0 | 0% |
| Frauke | 7/10 | 4623 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
-1.34% 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 67 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 64 | -1.28% |
| 65 | -1.30% |
| 66 | -1.32% |
| 67 | -1.34% |
| 68 | -1.36% |
| 69 | -1.38% |
| 70 | -1.40% |
| … | … |
Final Ranking Score
91%
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.