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
89.68%
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 | 2327 days | 100% |
| Amanda Walden | 10/10 | 3210 days | 57% |
| Monique Pos | 9/10 | 3300 days | 52% |
| Alison Egan-Jones | 9/10 | 3330 days | 50% |
| Sylvain Schiber | 9/10 | 3331 days | 50% |
| Sylvain Chanton | 10/10 | 3336 days | 50% |
| Julian Gury | 8/10 | 3344 days | 49% |
| R. Damen | 9/10 | 3361 days | 49% |
| Michelle Smit | 10/10 | 3422 days | 46% |
| Gesa Roemer | 8/10 | 3552 days | 39% |
| Anais Roux | 10/10 | 3557 days | 40% |
| Luca Staudt | 8/10 | 3576 days | 38% |
| Florian Bisault | 7/10 | 3577 days | 36% |
| Anna Jungclaus | 9/10 | 3584 days | 38% |
| Signe Broedbaek | 7/10 | 3586 days | 35% |
| Petra Fragner | 10/10 | 3592 days | 38% |
| Koehler Ute | 10/10 | 3604 days | 37% |
| Niclas Ullno | 8/10 | 3607 days | 36% |
| Tamara | 7/10 | 3608 days | 34% |
| Chloe Guerillot | 9/10 | 3618 days | 36% |
| Luisa and Hannes | 9/10 | 3631 days | 36% |
| elena salimzhanova | 10/10 | 3635 days | 36% |
| Jakub Trojanek | 8/10 | 3646 days | 34% |
| Malina | 10/10 | 3652 days | 35% |
| Emma Keegan | 7/10 | 3910 days | 21% |
| Emilie Normand | 7/10 | 3981 days | 17% |
| Christopher Buch Madsen | 8/10 | 4302 days | 3% |
| Phil Bromby | 9/10 | 4304 days | 3% |
| Tobias Thull | 7/10 | 4310 days | 2% |
| Rita Hochstiasser | 8/10 | 4332 days | 1% |
| Nelle Dutilleur | 10/10 | 4353 days | 0% |
| Mathias Butterlin | 8/10 | 4353 days | 0% |
| Daryl | 8/10 | 4361 days | 0% |
| Bert Pubeg | 9/10 | 4427 days | 24% |
| Alex | 8/10 | 4731 days | 24% |
| Lucie | 9/10 | 4767 days | 24% |
| Henzen | 9/10 | 4771 days | 24% |
| Roy Barton | 9/10 | 5034 days | 24% |
| Brian Livesey | 9/10 | 5042 days | 24% |
| Merlyn | 8/10 | 5050 days | 24% |
| Beyeler | 10/10 | 5054 days | 24% |
| Ralf Glaser | 7/10 | 5054 days | 22% |
| Suzanne van Kol | 8/10 | 5059 days | 24% |
| kiwifrenchy | 10/10 | 5066 days | 24% |
| _mel_ | 9/10 | 5097 days | 24% |
| C | 10/10 | 5097 days | 24% |
| Sarah and Soren | 10/10 | 5134 days | 24% |
| Erik Folkersen | 10/10 | 5142 days | 24% |
| Rudlinger | 10/10 | 5145 days | 24% |
| GenH | 10/10 | 5372 days | 24% |
| R Tearle | 10/10 | 5381 days | 24% |
| Franzi & Tobi | 10/10 | 5383 days | 24% |
| Nathalie | 10/10 | 5387 days | 24% |
| Ven | 9/10 | 5389 days | 24% |
| Jerven and Kim | 10/10 | 5396 days | 24% |
| Sarah Luijckx | 1/10 | 5398 days | 9% |
| Alan Jeffery | 7/10 | 5399 days | 22% |
| Birgette Weiner | 9/10 | 5417 days | 24% |
| Tim Van Nispen | 9/10 | 5419 days | 24% |
| Bottcher | 10/10 | 5419 days | 24% |
| Sue & Graham Mullin | 10/10 | 5426 days | 24% |
| John Simpson | 9/10 | 5428 days | 24% |
| Karen Phillips | 9/10 | 5428 days | 24% |
| Michelle Booty | 8/10 | 5430 days | 24% |
| Nadia Husain | 7/10 | 5431 days | 22% |
| Dietmar Gans | 10/10 | 5737 days | 24% |
| Matt Roper | 10/10 | 5759 days | 24% |
| Chris Glasg | 10/10 | 5776 days | 24% |
| Jamie Hallifax | 9/10 | 5787 days | 24% |
| Paul Ritchie | 10/10 | 5791 days | 24% |
| Gerry Donoghue | 10/10 | 5810 days | 24% |
| Yvonne German | 9/10 | 5813 days | 24% |
| DebbieM | 5/10 | 5827 days | 18% |
| mj111 | 10/10 | 5827 days | 24% |
| Susann Koschmeider | 10/10 | 5862 days | 24% |
| X Otte | 10/10 | 5866 days | 24% |
| Hans Hoff | 10/10 | 5866 days | 24% |
| Solveig Mosinski | 10/10 | 5870 days | 24% |
| Val and Barnie Weir | 10/10 | 5881 days | 24% |
| Wim Put | 9/10 | 5884 days | 24% |
| discerner | 10/10 | 5888 days | 24% |
| Phillip Reade | 10/10 | 5888 days | 24% |
| Tim Beuzeval | 9/10 | 5888 days | 24% |
| barp | 9/10 | 5919 days | 24% |
| Becky Fairweather | 10/10 | 6072 days | 24% |
| David | 10/10 | 6102 days | 24% |
| martinat | 10/10 | 6102 days | 24% |
| Mike | 9/10 | 6111 days | 24% |
| MichaelS1 | 9/10 | 6118 days | 24% |
| StefanieGermany | 9/10 | 6119 days | 24% |
| Veronika | 9/10 | 6121 days | 24% |
| Ralph Boese | 7/10 | 6122 days | 22% |
| ToyalFrance | 9/10 | 6122 days | 24% |
| ReneeA | 9/10 | 6150 days | 24% |
| Lorna | 8/10 | 6151 days | 24% |
| Bruce | 10/10 | 6152 days | 24% |
| Sandra | 10/10 | 6159 days | 24% |
| Heidi | 7/10 | 6166 days | 22% |
| Philipp | 9/10 | 6166 days | 24% |
| Simon | 9/10 | 6168 days | 24% |
| Kathryn | 8/10 | 6169 days | 24% |
| Barbara | 9/10 | 6174 days | 24% |
| Joachim | 10/10 | 6174 days | 24% |
| Ans | 7/10 | 6175 days | 22% |
| Minder | 10/10 | 6176 days | 24% |
| Evi | 7/10 | 6207 days | 22% |
| Ann Maree | 9/10 | 6210 days | 24% |
| Trine | 9/10 | 6220 days | 24% |
| Carina Korn | 10/10 | 6317 days | 24% |
| Christian | 7/10 | 6317 days | 22% |
| Nick | 10/10 | 6320 days | 24% |
| Terri Scott | 7/10 | 6337 days | 22% |
| Alan Bellerby | 10/10 | 6488 days | 24% |
| Robert | 4/10 | 6494 days | 15% |
| Elise | 10/10 | 6494 days | 24% |
| Fung | 8/10 | 6494 days | 24% |
| Peter Aston | 9/10 | 6494 days | 24% |
| Tony Wicks | 8/10 | 6499 days | 24% |
| Sue | 8/10 | 6506 days | 24% |
| Carla | 9/10 | 6514 days | 24% |
| Melissa Steedman | 9/10 | 6541 days | 24% |
| Vanessa Brennan | 7/10 | 6541 days | 22% |
| Tim | 9/10 | 6542 days | 24% |
| Mary | 10/10 | 6592 days | 24% |
| Agnes | 9/10 | 6808 days | 24% |
| Cohen | 9/10 | 6828 days | 24% |
| John | 8/10 | 6832 days | 24% |
| SueLinsk | 9/10 | 6832 days | 24% |
| Frauke | 7/10 | 6874 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
-4.06% 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 | -4.00% |
| 198 | -4.02% |
| 199 | -4.04% |
| 200 | -4.06% |
| 201 | -4.08% |
| 202 | -4.10% |
| 203 | -4.12% |
| … | … |
Balancing Adjustment
1.70% 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.