G'day, 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
89.49%
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 |
|---|---|---|---|
| Matthew Mutimer | 10/10 | 2496 days | 100% |
| Amanda Walden | 10/10 | 3379 days | 47% |
| Monique Pos | 9/10 | 3469 days | 41% |
| Alison Egan-Jones | 9/10 | 3499 days | 40% |
| Sylvain Schiber | 9/10 | 3499 days | 40% |
| Sylvain Chanton | 10/10 | 3504 days | 40% |
| Julian Gury | 8/10 | 3512 days | 38% |
| R. Damen | 9/10 | 3530 days | 38% |
| Michelle Smit | 10/10 | 3591 days | 35% |
| Gesa Roemer | 8/10 | 3720 days | 26% |
| Anais Roux | 10/10 | 3725 days | 27% |
| Luca Staudt | 8/10 | 3744 days | 25% |
| Florian Bisault | 7/10 | 3745 days | 23% |
| Anna Jungclaus | 9/10 | 3752 days | 25% |
| Signe Broedbaek | 7/10 | 3754 days | 22% |
| Petra Fragner | 10/10 | 3760 days | 25% |
| Koehler Ute | 10/10 | 3773 days | 24% |
| Niclas Ullno | 8/10 | 3775 days | 23% |
| Tamara | 7/10 | 3776 days | 21% |
| Chloe Guerillot | 9/10 | 3786 days | 23% |
| Luisa and Hannes | 9/10 | 3799 days | 22% |
| elena salimzhanova | 10/10 | 3804 days | 22% |
| Jakub Trojanek | 8/10 | 3814 days | 21% |
| Malina | 10/10 | 3820 days | 21% |
| Emma Keegan | 7/10 | 4079 days | 4% |
| Emilie Normand | 7/10 | 4149 days | 0% |
| Christopher Buch Madsen | 8/10 | 4470 days | 18% |
| Phil Bromby | 9/10 | 4472 days | 18% |
| Tobias Thull | 7/10 | 4478 days | 16% |
| Rita Hochstiasser | 8/10 | 4500 days | 18% |
| Nelle Dutilleur | 10/10 | 4521 days | 18% |
| Mathias Butterlin | 8/10 | 4521 days | 18% |
| Daryl | 8/10 | 4529 days | 18% |
| Bert Pubeg | 9/10 | 4595 days | 18% |
| Alex | 8/10 | 4899 days | 18% |
| Lucie | 9/10 | 4935 days | 18% |
| Henzen | 9/10 | 4939 days | 18% |
| Roy Barton | 9/10 | 5202 days | 18% |
| Brian Livesey | 9/10 | 5210 days | 18% |
| Merlyn | 8/10 | 5218 days | 18% |
| Beyeler | 10/10 | 5222 days | 18% |
| Ralf Glaser | 7/10 | 5222 days | 16% |
| Suzanne van Kol | 8/10 | 5227 days | 18% |
| kiwifrenchy | 10/10 | 5234 days | 18% |
| _mel_ | 9/10 | 5265 days | 18% |
| C | 10/10 | 5265 days | 18% |
| Sarah and Soren | 10/10 | 5302 days | 18% |
| Erik Folkersen | 10/10 | 5310 days | 18% |
| Rudlinger | 10/10 | 5313 days | 18% |
| GenH | 10/10 | 5540 days | 18% |
| R Tearle | 10/10 | 5549 days | 18% |
| Franzi & Tobi | 10/10 | 5551 days | 18% |
| Nathalie | 10/10 | 5555 days | 18% |
| Ven | 9/10 | 5557 days | 18% |
| Jerven and Kim | 10/10 | 5564 days | 18% |
| Sarah Luijckx | 1/10 | 5566 days | 0% |
| Alan Jeffery | 7/10 | 5567 days | 16% |
| Birgette Weiner | 9/10 | 5585 days | 18% |
| Tim Van Nispen | 9/10 | 5587 days | 18% |
| Bottcher | 10/10 | 5587 days | 18% |
| Sue & Graham Mullin | 10/10 | 5594 days | 18% |
| John Simpson | 9/10 | 5596 days | 18% |
| Karen Phillips | 9/10 | 5596 days | 18% |
| Michelle Booty | 8/10 | 5598 days | 18% |
| Nadia Husain | 7/10 | 5599 days | 16% |
| Dietmar Gans | 10/10 | 5905 days | 18% |
| Matt Roper | 10/10 | 5927 days | 18% |
| Chris Glasg | 10/10 | 5944 days | 18% |
| Jamie Hallifax | 9/10 | 5955 days | 18% |
| Paul Ritchie | 10/10 | 5959 days | 18% |
| Gerry Donoghue | 10/10 | 5978 days | 18% |
| Yvonne German | 9/10 | 5981 days | 18% |
| DebbieM | 5/10 | 5995 days | 11% |
| mj111 | 10/10 | 5995 days | 18% |
| Susann Koschmeider | 10/10 | 6030 days | 18% |
| X Otte | 10/10 | 6034 days | 18% |
| Hans Hoff | 10/10 | 6034 days | 18% |
| Solveig Mosinski | 10/10 | 6038 days | 18% |
| Val and Barnie Weir | 10/10 | 6049 days | 18% |
| Wim Put | 9/10 | 6052 days | 18% |
| discerner | 10/10 | 6056 days | 18% |
| Phillip Reade | 10/10 | 6056 days | 18% |
| Tim Beuzeval | 9/10 | 6056 days | 18% |
| barp | 9/10 | 6087 days | 18% |
| Becky Fairweather | 10/10 | 6240 days | 18% |
| David | 10/10 | 6270 days | 18% |
| martinat | 10/10 | 6270 days | 18% |
| Mike | 9/10 | 6280 days | 18% |
| MichaelS1 | 9/10 | 6286 days | 18% |
| StefanieGermany | 9/10 | 6288 days | 18% |
| Veronika | 9/10 | 6289 days | 18% |
| Ralph Boese | 7/10 | 6290 days | 16% |
| ToyalFrance | 9/10 | 6290 days | 18% |
| ReneeA | 9/10 | 6318 days | 18% |
| Lorna | 8/10 | 6320 days | 18% |
| Bruce | 10/10 | 6321 days | 18% |
| Sandra | 10/10 | 6327 days | 18% |
| Heidi | 7/10 | 6335 days | 16% |
| Philipp | 9/10 | 6335 days | 18% |
| Simon | 9/10 | 6336 days | 18% |
| Kathryn | 8/10 | 6337 days | 18% |
| Barbara | 9/10 | 6342 days | 18% |
| Joachim | 10/10 | 6342 days | 18% |
| Ans | 7/10 | 6343 days | 16% |
| Minder | 10/10 | 6344 days | 18% |
| Evi | 7/10 | 6376 days | 16% |
| Ann Maree | 9/10 | 6378 days | 18% |
| Trine | 9/10 | 6389 days | 18% |
| Carina Korn | 10/10 | 6486 days | 18% |
| Christian | 7/10 | 6486 days | 16% |
| Nick | 10/10 | 6489 days | 18% |
| Terri Scott | 7/10 | 6506 days | 16% |
| Alan Bellerby | 10/10 | 6656 days | 18% |
| Robert | 4/10 | 6662 days | 8% |
| Elise | 10/10 | 6662 days | 18% |
| Fung | 8/10 | 6662 days | 18% |
| Peter Aston | 9/10 | 6662 days | 18% |
| Tony Wicks | 8/10 | 6667 days | 18% |
| Sue | 8/10 | 6674 days | 18% |
| Carla | 9/10 | 6682 days | 18% |
| Melissa Steedman | 9/10 | 6709 days | 18% |
| Vanessa Brennan | 7/10 | 6709 days | 16% |
| Tim | 9/10 | 6710 days | 18% |
| Mary | 10/10 | 6760 days | 18% |
| Agnes | 9/10 | 6976 days | 18% |
| Cohen | 9/10 | 6996 days | 18% |
| John | 8/10 | 7000 days | 18% |
| SueLinsk | 9/10 | 7000 days | 18% |
| Frauke | 7/10 | 7042 days | 16% |
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
-2.45% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 106 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The White Island Tours experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -2.42% |
| 198 | -2.43% |
| 199 | -2.44% |
| 200 | -2.45% |
| 201 | -2.46% |
| 202 | -2.48% |
| 203 | -2.49% |
| … | … |
Balancing Adjustment
1.45% 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
88%
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.