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
91.02%
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 | 534 days | 100% |
| Amanda Walden | 10/10 | 1417 days | 8% |
| Monique Pos | 9/10 | 1507 days | 8% |
| Alison Egan-Jones | 9/10 | 1537 days | 8% |
| Sylvain Schiber | 9/10 | 1537 days | 8% |
| Sylvain Chanton | 10/10 | 1542 days | 7% |
| Julian Gury | 8/10 | 1550 days | 7% |
| R. Damen | 9/10 | 1568 days | 7% |
| Michelle Smit | 10/10 | 1629 days | 7% |
| Gesa Roemer | 8/10 | 1758 days | 6% |
| Anais Roux | 10/10 | 1763 days | 7% |
| Luca Staudt | 8/10 | 1782 days | 6% |
| Florian Bisault | 7/10 | 1783 days | 6% |
| Anna Jungclaus | 9/10 | 1790 days | 7% |
| Signe Broedbaek | 7/10 | 1792 days | 6% |
| Petra Fragner | 10/10 | 1798 days | 7% |
| Koehler Ute | 10/10 | 1811 days | 7% |
| Niclas Ullno | 8/10 | 1813 days | 6% |
| Tamara | 7/10 | 1814 days | 6% |
| Chloe Guerillot | 9/10 | 1824 days | 6% |
| Luisa and Hannes | 9/10 | 1837 days | 6% |
| elena salimzhanova | 10/10 | 1842 days | 6% |
| Jakub Trojanek | 8/10 | 1852 days | 6% |
| Malina | 10/10 | 1858 days | 6% |
| Emma Keegan | 7/10 | 2117 days | 5% |
| Emilie Normand | 7/10 | 2187 days | 5% |
| Christopher Buch Madsen | 8/10 | 2508 days | 4% |
| Phil Bromby | 9/10 | 2510 days | 4% |
| Tobias Thull | 7/10 | 2516 days | 4% |
| Rita Hochstiasser | 8/10 | 2538 days | 4% |
| Nelle Dutilleur | 10/10 | 2559 days | 4% |
| Mathias Butterlin | 8/10 | 2559 days | 4% |
| Daryl | 8/10 | 2567 days | 4% |
| Bert Pubeg | 9/10 | 2633 days | 4% |
| Alex | 8/10 | 2937 days | 2% |
| Lucie | 9/10 | 2973 days | 2% |
| Henzen | 9/10 | 2977 days | 2% |
| Roy Barton | 9/10 | 3240 days | 1% |
| Brian Livesey | 9/10 | 3248 days | 1% |
| Merlyn | 8/10 | 3256 days | 1% |
| Beyeler | 10/10 | 3260 days | 1% |
| Ralf Glaser | 7/10 | 3260 days | 1% |
| Suzanne van Kol | 8/10 | 3265 days | 1% |
| kiwifrenchy | 10/10 | 3272 days | 1% |
| _mel_ | 9/10 | 3303 days | 1% |
| C | 10/10 | 3303 days | 1% |
| Sarah and Soren | 10/10 | 3340 days | 1% |
| Erik Folkersen | 10/10 | 3348 days | 1% |
| Rudlinger | 10/10 | 3351 days | 1% |
| GenH | 10/10 | 3578 days | 0% |
| R Tearle | 10/10 | 3587 days | 0% |
| Franzi & Tobi | 10/10 | 3589 days | 0% |
| Nathalie | 10/10 | 3593 days | 0% |
| Ven | 9/10 | 3595 days | 0% |
| Jerven and Kim | 10/10 | 3602 days | 0% |
| Sarah Luijckx | 1/10 | 3604 days | 0% |
| Alan Jeffery | 7/10 | 3605 days | 0% |
| Birgette Weiner | 9/10 | 3623 days | 0% |
| Tim Van Nispen | 9/10 | 3625 days | 0% |
| Bottcher | 10/10 | 3625 days | 0% |
| Sue & Graham Mullin | 10/10 | 3632 days | 0% |
| John Simpson | 9/10 | 3634 days | 0% |
| Karen Phillips | 9/10 | 3634 days | 0% |
| Michelle Booty | 8/10 | 3636 days | 0% |
| Nadia Husain | 7/10 | 3637 days | 0% |
| Dietmar Gans | 10/10 | 3943 days | 2% |
| Matt Roper | 10/10 | 3965 days | 2% |
| Chris Glasg | 10/10 | 3982 days | 2% |
| Jamie Hallifax | 9/10 | 3993 days | 2% |
| Paul Ritchie | 10/10 | 3997 days | 2% |
| Gerry Donoghue | 10/10 | 4016 days | 2% |
| Yvonne German | 9/10 | 4019 days | 2% |
| DebbieM | 5/10 | 4033 days | 1% |
| mj111 | 10/10 | 4033 days | 2% |
| Susann Koschmeider | 10/10 | 4068 days | 2% |
| X Otte | 10/10 | 4072 days | 2% |
| Hans Hoff | 10/10 | 4072 days | 2% |
| Solveig Mosinski | 10/10 | 4076 days | 2% |
| Val and Barnie Weir | 10/10 | 4087 days | 2% |
| Wim Put | 9/10 | 4090 days | 2% |
| discerner | 10/10 | 4094 days | 2% |
| Phillip Reade | 10/10 | 4094 days | 2% |
| Tim Beuzeval | 9/10 | 4094 days | 2% |
| barp | 9/10 | 4125 days | 2% |
| Becky Fairweather | 10/10 | 4278 days | 2% |
| David | 10/10 | 4308 days | 2% |
| martinat | 10/10 | 4308 days | 2% |
| Mike | 9/10 | 4317 days | 2% |
| MichaelS1 | 9/10 | 4324 days | 2% |
| StefanieGermany | 9/10 | 4325 days | 2% |
| Veronika | 9/10 | 4327 days | 2% |
| Ralph Boese | 7/10 | 4328 days | 2% |
| ToyalFrance | 9/10 | 4328 days | 2% |
| ReneeA | 9/10 | 4356 days | 2% |
| Lorna | 8/10 | 4357 days | 2% |
| Bruce | 10/10 | 4358 days | 2% |
| Sandra | 10/10 | 4365 days | 2% |
| Heidi | 7/10 | 4372 days | 2% |
| Philipp | 9/10 | 4372 days | 2% |
| Simon | 9/10 | 4374 days | 2% |
| Kathryn | 8/10 | 4375 days | 2% |
| Barbara | 9/10 | 4380 days | 2% |
| Joachim | 10/10 | 4380 days | 2% |
| Ans | 7/10 | 4381 days | 2% |
| Minder | 10/10 | 4382 days | 2% |
| Evi | 7/10 | 4413 days | 2% |
| Ann Maree | 9/10 | 4416 days | 2% |
| Trine | 9/10 | 4426 days | 2% |
| Carina Korn | 10/10 | 4524 days | 2% |
| Christian | 7/10 | 4524 days | 2% |
| Nick | 10/10 | 4526 days | 2% |
| Terri Scott | 7/10 | 4544 days | 2% |
| Alan Bellerby | 10/10 | 4694 days | 2% |
| Robert | 4/10 | 4700 days | 1% |
| Elise | 10/10 | 4700 days | 2% |
| Fung | 8/10 | 4700 days | 2% |
| Peter Aston | 9/10 | 4700 days | 2% |
| Tony Wicks | 8/10 | 4705 days | 2% |
| Sue | 8/10 | 4712 days | 2% |
| Carla | 9/10 | 4720 days | 2% |
| Melissa Steedman | 9/10 | 4747 days | 2% |
| Vanessa Brennan | 7/10 | 4747 days | 2% |
| Tim | 9/10 | 4748 days | 2% |
| Mary | 10/10 | 4798 days | 2% |
| Agnes | 9/10 | 5014 days | 2% |
| Cohen | 9/10 | 5034 days | 2% |
| John | 8/10 | 5038 days | 2% |
| SueLinsk | 9/10 | 5038 days | 2% |
| Frauke | 7/10 | 5080 days | 2% |
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
-4.08% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 46 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 | -4.02% |
| 198 | -4.04% |
| 199 | -4.06% |
| 200 | -4.08% |
| 201 | -4.10% |
| 202 | -4.12% |
| 203 | -4.15% |
| … | … |
Final Ranking Score
87%
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.