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
92.09%
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 | 379 days | 77.24 | 100% | |
| Amanda Walden | 10/10 | 1262 days | 4.67 | 6% | |
| Monique Pos | 9/10 | 1352 days | 4.5 | 6% | |
| Alison Egan-Jones | 9/10 | 1382 days | 4.44 | 6% | |
| Sylvain Schiber | 9/10 | 1383 days | 4.44 | 6% | |
| Sylvain Chanton | 10/10 | 1388 days |  |
4.43 | 6% |
| Julian Gury | 8/10 | 1396 days | |
4.19 | 5% |
| R. Damen | 9/10 | 1413 days | 4.38 | 6% | |
| Michelle Smit | 10/10 | 1474 days | 4.26 | 6% | |
| Gesa Roemer | 8/10 | 1604 days | |
3.8 | 5% |
| Anais Roux | 10/10 | 1609 days | |
3.99 | 5% |
| Luca Staudt | 8/10 | 1628 days | |
3.76 | 5% |
| Florian Bisault | 7/10 | 1629 days | |
3.6 | 5% |
| Anna Jungclaus | 9/10 | 1636 days | |
3.94 | 5% |
| Signe Broedbaek | 7/10 | 1638 days | |
3.58 | 5% |
| Petra Fragner | 10/10 | 1644 days | |
3.93 | 5% |
| Koehler Ute | 10/10 | 1656 days | 3.9 | 5% | |
| Niclas Ullno | 8/10 | 1659 days | |
3.7 | 5% |
| Tamara | 7/10 | 1660 days | |
3.54 | 5% |
| Chloe Guerillot | 9/10 | 1670 days | |
3.87 | 5% |
| Luisa and Hannes | 9/10 | 1683 days | |
3.85 | 5% |
| elena salimzhanova | 10/10 | 1687 days | 3.84 | 5% | |
| Jakub Trojanek | 8/10 | 1698 days | |
3.63 | 5% |
| Malina | 10/10 | 1704 days | |
3.81 | 5% |
| Emma Keegan | 7/10 | 1962 days | 3.01 | 4% | |
| Emilie Normand | 7/10 | 2033 days | |
2.88 | 4% |
| Christopher Buch Madsen | 8/10 | 2354 days | |
2.41 | 3% |
| Phil Bromby | 9/10 | 2356 days | |
2.53 | 3% |
| Tobias Thull | 7/10 | 2362 days | |
2.29 | 3% |
| Rita Hochstiasser | 8/10 | 2384 days | |
2.35 | 3% |
| Nelle Dutilleur | 10/10 | 2405 days | |
2.44 | 3% |
| Mathias Butterlin | 8/10 | 2405 days | |
2.31 | 3% |
| Daryl | 8/10 | 2413 days | |
2.3 | 3% |
| Bert Pubeg | 9/10 | 2479 days | 2.29 | 3% | |
| Alex | 8/10 | 2783 days | 1.61 | 2% | |
| Lucie | 9/10 | 2819 days | |
1.63 | 2% |
| Henzen | 9/10 | 2823 days | |
1.62 | 2% |
| Roy Barton | 9/10 | 3086 days | |
1.1 | 1% |
| Brian Livesey | 9/10 | 3094 days | |
1.09 | 1% |
| Merlyn | 8/10 | 3102 days | |
1.02 | 1% |
| Beyeler | 10/10 | 3106 days | |
1.06 | 1% |
| Ralf Glaser | 7/10 | 3106 days | |
0.97 | 1% |
| Suzanne van Kol | 8/10 | 3111 days | |
1.0 | 1% |
| kiwifrenchy | 10/10 | 3118 days | 1.04 | 1% | |
| _mel_ | 9/10 | 3149 days | 0.98 | 1% | |
| C | 10/10 | 3149 days | 0.98 | 1% | |
| Sarah and Soren | 10/10 | 3186 days | |
0.91 | 1% |
| Erik Folkersen | 10/10 | 3194 days | |
0.89 | 1% |
| Rudlinger | 10/10 | 3197 days | |
0.89 | 1% |
| GenH | 10/10 | 3424 days | 0.44 | 1% | |
| R Tearle | 10/10 | 3433 days | |
0.42 | 1% |
| Franzi & Tobi | 10/10 | 3435 days | |
0.42 | 1% |
| Nathalie | 10/10 | 3439 days | |
0.41 | 1% |
| Ven | 9/10 | 3441 days | |
0.41 | 1% |
| Jerven and Kim | 10/10 | 3448 days | |
0.4 | 1% |
| Sarah Luijckx | 1/10 | 3450 days | |
0.29 | 0% |
| Alan Jeffery | 7/10 | 3451 days | |
0.35 | 0% |
| Birgette Weiner | 9/10 | 3469 days | |
0.35 | 0% |
| Tim Van Nispen | 9/10 | 3471 days | |
0.35 | 0% |
| Bottcher | 10/10 | 3471 days | |
0.35 | 0% |
| Sue & Graham Mullin | 10/10 | 3478 days | |
0.34 | 0% |
| John Simpson | 9/10 | 3480 days | |
0.33 | 0% |
| Karen Phillips | 9/10 | 3480 days | |
0.33 | 0% |
| Michelle Booty | 8/10 | 3482 days | |
0.31 | 0% |
| Nadia Husain | 7/10 | 3483 days | |
0.3 | 0% |
| Dietmar Gans | 10/10 | 3789 days | 0.0 | 0% | |
| Matt Roper | 10/10 | 3811 days | |
0.0 | 0% |
| Chris Glasg | 10/10 | 3828 days | |
0.0 | 0% |
| Jamie Hallifax | 9/10 | 3839 days | |
0.0 | 0% |
| Paul Ritchie | 10/10 | 3843 days | |
0.0 | 0% |
| Gerry Donoghue | 10/10 | 3862 days | |
0.0 | 0% |
| Yvonne German | 9/10 | 3865 days | |
0.0 | 0% |
| DebbieM | 5/10 | 3879 days | 0.0 | 0% | |
| mj111 | 10/10 | 3879 days | 0.0 | 0% | |
| Susann Koschmeider | 10/10 | 3914 days | |
0.0 | 0% |
| X Otte | 10/10 | 3918 days | |
0.0 | 0% |
| Hans Hoff | 10/10 | 3918 days | |
0.0 | 0% |
| Solveig Mosinski | 10/10 | 3922 days | |
0.0 | 0% |
| Val and Barnie Weir | 10/10 | 3933 days | |
0.0 | 0% |
| Wim Put | 9/10 | 3936 days | |
0.0 | 0% |
| discerner | 10/10 | 3940 days | 0.0 | 0% | |
| Phillip Reade | 10/10 | 3940 days | 0.0 | 0% | |
| Tim Beuzeval | 9/10 | 3940 days | |
0.0 | 0% |
| barp | 9/10 | 3971 days | |
0.0 | 0% |
| Becky Fairweather | 10/10 | 4124 days | 0.0 | 0% | |
| David | 10/10 | 4154 days | 0.0 | 0% | |
| martinat | 10/10 | 4154 days | |
0.0 | 0% |
| Mike | 9/10 | 4163 days | |
0.0 | 0% |
| MichaelS1 | 9/10 | 4170 days | |
0.0 | 0% |
| StefanieGermany | 9/10 | 4171 days | |
0.0 | 0% |
| Veronika | 9/10 | 4173 days | |
0.0 | 0% |
| Ralph Boese | 7/10 | 4174 days | |
0.0 | 0% |
| ToyalFrance | 9/10 | 4174 days | |
0.0 | 0% |
| ReneeA | 9/10 | 4202 days | |
0.0 | 0% |
| Lorna | 8/10 | 4203 days | |
0.0 | 0% |
| Bruce | 10/10 | 4204 days | |
0.0 | 0% |
| Sandra | 10/10 | 4211 days | |
0.0 | 0% |
| Heidi | 7/10 | 4218 days | |
0.0 | 0% |
| Philipp | 9/10 | 4218 days | |
0.0 | 0% |
| Simon | 9/10 | 4220 days | |
0.0 | 0% |
| Kathryn | 8/10 | 4221 days | |
0.0 | 0% |
| Barbara | 9/10 | 4226 days | |
0.0 | 0% |
| Joachim | 10/10 | 4226 days | |
0.0 | 0% |
| Ans | 7/10 | 4227 days | |
0.0 | 0% |
| Minder | 10/10 | 4228 days | |
0.0 | 0% |
| Evi | 7/10 | 4259 days | |
0.0 | 0% |
| Ann Maree | 9/10 | 4262 days | 0.0 | 0% | |
| Trine | 9/10 | 4272 days | |
0.0 | 0% |
| Carina Korn | 10/10 | 4369 days | |
0.0 | 0% |
| Christian | 7/10 | 4369 days | |
0.0 | 0% |
| Nick | 10/10 | 4372 days | |
0.0 | 0% |
| Terri Scott | 7/10 | 4389 days | |
0.0 | 0% |
| Alan Bellerby | 10/10 | 4540 days | |
0.0 | 0% |
| Robert | 4/10 | 4546 days | |
0.0 | 0% |
| Elise | 10/10 | 4546 days | |
0.0 | 0% |
| Fung | 8/10 | 4546 days | |
0.0 | 0% |
| Peter Aston | 9/10 | 4546 days | |
0.0 | 0% |
| Tony Wicks | 8/10 | 4551 days | |
0.0 | 0% |
| Sue | 8/10 | 4558 days | |
0.0 | 0% |
| Carla | 9/10 | 4566 days | |
0.0 | 0% |
| Melissa Steedman | 9/10 | 4593 days | |
0.0 | 0% |
| Vanessa Brennan | 7/10 | 4593 days | |
0.0 | 0% |
| Tim | 9/10 | 4594 days | |
0.0 | 0% |
| Mary | 10/10 | 4644 days | |
0.0 | 0% |
| Agnes | 9/10 | 4860 days | |
0.0 | 0% |
| Cohen | 9/10 | 4880 days | |
0.0 | 0% |
| John | 8/10 | 4884 days | |
0.0 | 0% |
| SueLinsk | 9/10 | 4884 days | |
0.0 | 0% |
| Frauke | 7/10 | 4926 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
-2.31% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 113 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 | -2.28% |
| 198 | -2.29% |
| 199 | -2.30% |
| 200 | -2.31% |
| 201 | -2.32% |
| 202 | -2.33% |
| 203 | -2.35% |
| … | … |
Final Ranking Score
90%
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.