Hi, 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
89.67%
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 | Relative Weight |
|---|---|---|---|
| Matthew Mutimer | 10/10 | 2317 days | 100% |
| Amanda Walden | 10/10 | 3200 days | 57% |
| Monique Pos | 9/10 | 3290 days | 52% |
| Alison Egan-Jones | 9/10 | 3320 days | 50% |
| Sylvain Schiber | 9/10 | 3321 days | 50% |
| Sylvain Chanton | 10/10 | 3326 days | 50% |
| Julian Gury | 8/10 | 3334 days | 49% |
| R. Damen | 9/10 | 3351 days | 49% |
| Michelle Smit | 10/10 | 3412 days | 46% |
| Gesa Roemer | 8/10 | 3542 days | 39% |
| Anais Roux | 10/10 | 3547 days | 40% |
| Luca Staudt | 8/10 | 3566 days | 38% |
| Florian Bisault | 7/10 | 3567 days | 36% |
| Anna Jungclaus | 9/10 | 3574 days | 38% |
| Signe Broedbaek | 7/10 | 3576 days | 35% |
| Petra Fragner | 10/10 | 3582 days | 38% |
| Koehler Ute | 10/10 | 3594 days | 37% |
| Niclas Ullno | 8/10 | 3597 days | 36% |
| Tamara | 7/10 | 3598 days | 34% |
| Chloe Guerillot | 9/10 | 3608 days | 36% |
| Luisa and Hannes | 9/10 | 3621 days | 36% |
| elena salimzhanova | 10/10 | 3625 days | 36% |
| Jakub Trojanek | 8/10 | 3636 days | 34% |
| Malina | 10/10 | 3642 days | 35% |
| Emma Keegan | 7/10 | 3900 days | 21% |
| Emilie Normand | 7/10 | 3971 days | 17% |
| Christopher Buch Madsen | 8/10 | 4292 days | 3% |
| Phil Bromby | 9/10 | 4294 days | 3% |
| Tobias Thull | 7/10 | 4300 days | 2% |
| Rita Hochstiasser | 8/10 | 4322 days | 1% |
| Nelle Dutilleur | 10/10 | 4343 days | 0% |
| Mathias Butterlin | 8/10 | 4343 days | 0% |
| Daryl | 8/10 | 4351 days | 0% |
| Bert Pubeg | 9/10 | 4417 days | 23% |
| Alex | 8/10 | 4721 days | 23% |
| Lucie | 9/10 | 4757 days | 23% |
| Henzen | 9/10 | 4761 days | 23% |
| Roy Barton | 9/10 | 5024 days | 23% |
| Brian Livesey | 9/10 | 5032 days | 23% |
| Merlyn | 8/10 | 5040 days | 23% |
| Beyeler | 10/10 | 5044 days | 24% |
| Ralf Glaser | 7/10 | 5044 days | 22% |
| Suzanne van Kol | 8/10 | 5049 days | 23% |
| kiwifrenchy | 10/10 | 5056 days | 24% |
| _mel_ | 9/10 | 5087 days | 23% |
| C | 10/10 | 5087 days | 24% |
| Sarah and Soren | 10/10 | 5124 days | 24% |
| Erik Folkersen | 10/10 | 5132 days | 24% |
| Rudlinger | 10/10 | 5135 days | 24% |
| GenH | 10/10 | 5362 days | 24% |
| R Tearle | 10/10 | 5371 days | 24% |
| Franzi & Tobi | 10/10 | 5373 days | 24% |
| Nathalie | 10/10 | 5377 days | 24% |
| Ven | 9/10 | 5379 days | 23% |
| Jerven and Kim | 10/10 | 5386 days | 24% |
| Sarah Luijckx | 1/10 | 5388 days | 9% |
| Alan Jeffery | 7/10 | 5389 days | 22% |
| Birgette Weiner | 9/10 | 5407 days | 23% |
| Tim Van Nispen | 9/10 | 5409 days | 23% |
| Bottcher | 10/10 | 5409 days | 24% |
| Sue & Graham Mullin | 10/10 | 5416 days | 24% |
| John Simpson | 9/10 | 5418 days | 23% |
| Karen Phillips | 9/10 | 5418 days | 23% |
| Michelle Booty | 8/10 | 5420 days | 23% |
| Nadia Husain | 7/10 | 5421 days | 22% |
| Dietmar Gans | 10/10 | 5727 days | 24% |
| Matt Roper | 10/10 | 5749 days | 24% |
| Chris Glasg | 10/10 | 5766 days | 24% |
| Jamie Hallifax | 9/10 | 5777 days | 23% |
| Paul Ritchie | 10/10 | 5781 days | 24% |
| Gerry Donoghue | 10/10 | 5800 days | 24% |
| Yvonne German | 9/10 | 5803 days | 23% |
| DebbieM | 5/10 | 5817 days | 18% |
| mj111 | 10/10 | 5817 days | 24% |
| Susann Koschmeider | 10/10 | 5852 days | 24% |
| X Otte | 10/10 | 5856 days | 24% |
| Hans Hoff | 10/10 | 5856 days | 24% |
| Solveig Mosinski | 10/10 | 5860 days | 24% |
| Val and Barnie Weir | 10/10 | 5871 days | 24% |
| Wim Put | 9/10 | 5874 days | 23% |
| discerner | 10/10 | 5878 days | 24% |
| Phillip Reade | 10/10 | 5878 days | 24% |
| Tim Beuzeval | 9/10 | 5878 days | 23% |
| barp | 9/10 | 5909 days | 23% |
| Becky Fairweather | 10/10 | 6062 days | 24% |
| David | 10/10 | 6092 days | 24% |
| martinat | 10/10 | 6092 days | 24% |
| Mike | 9/10 | 6101 days | 23% |
| MichaelS1 | 9/10 | 6108 days | 23% |
| StefanieGermany | 9/10 | 6109 days | 23% |
| Veronika | 9/10 | 6111 days | 23% |
| Ralph Boese | 7/10 | 6112 days | 22% |
| ToyalFrance | 9/10 | 6112 days | 23% |
| ReneeA | 9/10 | 6140 days | 23% |
| Lorna | 8/10 | 6141 days | 23% |
| Bruce | 10/10 | 6142 days | 24% |
| Sandra | 10/10 | 6149 days | 24% |
| Heidi | 7/10 | 6156 days | 22% |
| Philipp | 9/10 | 6156 days | 23% |
| Simon | 9/10 | 6158 days | 23% |
| Kathryn | 8/10 | 6159 days | 23% |
| Barbara | 9/10 | 6164 days | 23% |
| Joachim | 10/10 | 6164 days | 24% |
| Ans | 7/10 | 6165 days | 22% |
| Minder | 10/10 | 6166 days | 24% |
| Evi | 7/10 | 6197 days | 22% |
| Ann Maree | 9/10 | 6200 days | 23% |
| Trine | 9/10 | 6210 days | 23% |
| Carina Korn | 10/10 | 6307 days | 24% |
| Christian | 7/10 | 6307 days | 22% |
| Nick | 10/10 | 6310 days | 24% |
| Terri Scott | 7/10 | 6327 days | 22% |
| Alan Bellerby | 10/10 | 6478 days | 24% |
| Robert | 4/10 | 6484 days | 15% |
| Elise | 10/10 | 6484 days | 24% |
| Fung | 8/10 | 6484 days | 23% |
| Peter Aston | 9/10 | 6484 days | 23% |
| Tony Wicks | 8/10 | 6489 days | 23% |
| Sue | 8/10 | 6496 days | 23% |
| Carla | 9/10 | 6504 days | 23% |
| Melissa Steedman | 9/10 | 6531 days | 23% |
| Vanessa Brennan | 7/10 | 6531 days | 22% |
| Tim | 9/10 | 6532 days | 23% |
| Mary | 10/10 | 6582 days | 24% |
| Agnes | 9/10 | 6798 days | 23% |
| Cohen | 9/10 | 6818 days | 23% |
| John | 8/10 | 6822 days | 23% |
| SueLinsk | 9/10 | 6822 days | 23% |
| Frauke | 7/10 | 6864 days | 22% |
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
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
1.71% 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
87%
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.