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
92.20%
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 | 310 days | 84.77 | 100% | |
| Amanda Walden | 10/10 | 1193 days | 4.81 | 6% | |
| Monique Pos | 9/10 | 1283 days | 4.63 | 5% | |
| Alison Egan-Jones | 9/10 | 1313 days | 4.57 | 5% | |
| Sylvain Schiber | 9/10 | 1313 days | 4.57 | 5% | |
| Sylvain Chanton | 10/10 | 1318 days |  |
4.56 | 5% |
| Julian Gury | 8/10 | 1326 days | |
4.32 | 5% |
| R. Damen | 9/10 | 1344 days | 4.51 | 5% | |
| Michelle Smit | 10/10 | 1405 days | 4.39 | 5% | |
| Gesa Roemer | 8/10 | 1534 days | |
3.93 | 5% |
| Anais Roux | 10/10 | 1539 days | |
4.13 | 5% |
| Luca Staudt | 8/10 | 1558 days | |
3.89 | 5% |
| Florian Bisault | 7/10 | 1559 days | |
3.72 | 4% |
| Anna Jungclaus | 9/10 | 1566 days | |
4.08 | 5% |
| Signe Broedbaek | 7/10 | 1568 days | |
3.71 | 4% |
| Petra Fragner | 10/10 | 1574 days | |
4.06 | 5% |
| Koehler Ute | 10/10 | 1587 days | 4.04 | 5% | |
| Niclas Ullno | 8/10 | 1589 days | |
3.83 | 5% |
| Tamara | 7/10 | 1590 days | |
3.67 | 4% |
| Chloe Guerillot | 9/10 | 1600 days | |
4.01 | 5% |
| Luisa and Hannes | 9/10 | 1613 days | |
3.99 | 5% |
| elena salimzhanova | 10/10 | 1618 days | 3.98 | 5% | |
| Jakub Trojanek | 8/10 | 1628 days | |
3.76 | 4% |
| Malina | 10/10 | 1634 days | |
3.95 | 5% |
| Emma Keegan | 7/10 | 1893 days | 3.13 | 4% | |
| Emilie Normand | 7/10 | 1963 days | |
3.0 | 4% |
| Christopher Buch Madsen | 8/10 | 2284 days | |
2.54 | 3% |
| Phil Bromby | 9/10 | 2286 days | |
2.67 | 3% |
| Tobias Thull | 7/10 | 2292 days | |
2.42 | 3% |
| Rita Hochstiasser | 8/10 | 2314 days | |
2.48 | 3% |
| Nelle Dutilleur | 10/10 | 2335 days | |
2.57 | 3% |
| Mathias Butterlin | 8/10 | 2335 days | |
2.44 | 3% |
| Daryl | 8/10 | 2343 days | |
2.43 | 3% |
| Bert Pubeg | 9/10 | 2409 days | 2.43 | 3% | |
| Alex | 8/10 | 2713 days | 1.74 | 2% | |
| Lucie | 9/10 | 2749 days | |
1.76 | 2% |
| Henzen | 9/10 | 2753 days | |
1.76 | 2% |
| Roy Barton | 9/10 | 3016 days | |
1.24 | 1% |
| Brian Livesey | 9/10 | 3024 days | |
1.23 | 1% |
| Merlyn | 8/10 | 3032 days | |
1.15 | 1% |
| Beyeler | 10/10 | 3036 days | |
1.2 | 1% |
| Ralf Glaser | 7/10 | 3036 days | |
1.09 | 1% |
| Suzanne van Kol | 8/10 | 3041 days | |
1.13 | 1% |
| kiwifrenchy | 10/10 | 3048 days | 1.18 | 1% | |
| _mel_ | 9/10 | 3079 days | 1.12 | 1% | |
| C | 10/10 | 3079 days | 1.12 | 1% | |
| Sarah and Soren | 10/10 | 3116 days | |
1.05 | 1% |
| Erik Folkersen | 10/10 | 3124 days | |
1.03 | 1% |
| Rudlinger | 10/10 | 3127 days | |
1.02 | 1% |
| GenH | 10/10 | 3354 days | 0.58 | 1% | |
| R Tearle | 10/10 | 3363 days | |
0.56 | 1% |
| Franzi & Tobi | 10/10 | 3365 days | |
0.56 | 1% |
| Nathalie | 10/10 | 3369 days | |
0.55 | 1% |
| Ven | 9/10 | 3371 days | |
0.55 | 1% |
| Jerven and Kim | 10/10 | 3378 days | |
0.53 | 1% |
| Sarah Luijckx | 1/10 | 3380 days | |
0.39 | 0% |
| Alan Jeffery | 7/10 | 3381 days | |
0.48 | 1% |
| Birgette Weiner | 9/10 | 3399 days | |
0.49 | 1% |
| Tim Van Nispen | 9/10 | 3401 days | |
0.49 | 1% |
| Bottcher | 10/10 | 3401 days | |
0.49 | 1% |
| Sue & Graham Mullin | 10/10 | 3408 days | |
0.47 | 1% |
| John Simpson | 9/10 | 3410 days | |
0.47 | 1% |
| Karen Phillips | 9/10 | 3410 days | |
0.47 | 1% |
| Michelle Booty | 8/10 | 3412 days | |
0.44 | 1% |
| Nadia Husain | 7/10 | 3413 days | |
0.42 | 0% |
| Dietmar Gans | 10/10 | 3719 days | 0.0 | 0% | |
| Matt Roper | 10/10 | 3741 days | |
0.0 | 0% |
| Chris Glasg | 10/10 | 3758 days | |
0.0 | 0% |
| Jamie Hallifax | 9/10 | 3769 days | |
0.0 | 0% |
| Paul Ritchie | 10/10 | 3773 days | |
0.0 | 0% |
| Gerry Donoghue | 10/10 | 3792 days | |
0.0 | 0% |
| Yvonne German | 9/10 | 3795 days | |
0.0 | 0% |
| DebbieM | 5/10 | 3809 days | 0.0 | 0% | |
| mj111 | 10/10 | 3809 days | 0.0 | 0% | |
| Susann Koschmeider | 10/10 | 3844 days | |
0.0 | 0% |
| X Otte | 10/10 | 3848 days | |
0.0 | 0% |
| Hans Hoff | 10/10 | 3848 days | |
0.0 | 0% |
| Solveig Mosinski | 10/10 | 3852 days | |
0.0 | 0% |
| Val and Barnie Weir | 10/10 | 3863 days | |
0.0 | 0% |
| Wim Put | 9/10 | 3866 days | |
0.0 | 0% |
| discerner | 10/10 | 3870 days | 0.0 | 0% | |
| Phillip Reade | 10/10 | 3870 days | 0.0 | 0% | |
| Tim Beuzeval | 9/10 | 3870 days | |
0.0 | 0% |
| barp | 9/10 | 3901 days | |
0.0 | 0% |
| Becky Fairweather | 10/10 | 4054 days | 0.0 | 0% | |
| David | 10/10 | 4084 days | 0.0 | 0% | |
| martinat | 10/10 | 4084 days | |
0.0 | 0% |
| Mike | 9/10 | 4094 days | |
0.0 | 0% |
| MichaelS1 | 9/10 | 4100 days | |
0.0 | 0% |
| StefanieGermany | 9/10 | 4102 days | |
0.0 | 0% |
| Veronika | 9/10 | 4104 days | |
0.0 | 0% |
| Ralph Boese | 7/10 | 4104 days | |
0.0 | 0% |
| ToyalFrance | 9/10 | 4104 days | |
0.0 | 0% |
| ReneeA | 9/10 | 4132 days | |
0.0 | 0% |
| Lorna | 8/10 | 4134 days | |
0.0 | 0% |
| Bruce | 10/10 | 4135 days | |
0.0 | 0% |
| Sandra | 10/10 | 4141 days | |
0.0 | 0% |
| Heidi | 7/10 | 4149 days | |
0.0 | 0% |
| Philipp | 9/10 | 4149 days | |
0.0 | 0% |
| Simon | 9/10 | 4150 days | |
0.0 | 0% |
| Kathryn | 8/10 | 4151 days | |
0.0 | 0% |
| Barbara | 9/10 | 4156 days | |
0.0 | 0% |
| Joachim | 10/10 | 4157 days | |
0.0 | 0% |
| Ans | 7/10 | 4157 days | |
0.0 | 0% |
| Minder | 10/10 | 4159 days | |
0.0 | 0% |
| Evi | 7/10 | 4190 days | |
0.0 | 0% |
| Ann Maree | 9/10 | 4193 days | 0.0 | 0% | |
| Trine | 9/10 | 4203 days | |
0.0 | 0% |
| Carina Korn | 10/10 | 4300 days | |
0.0 | 0% |
| Christian | 7/10 | 4300 days | |
0.0 | 0% |
| Nick | 10/10 | 4303 days | |
0.0 | 0% |
| Terri Scott | 7/10 | 4320 days | |
0.0 | 0% |
| Alan Bellerby | 10/10 | 4470 days | |
0.0 | 0% |
| Robert | 4/10 | 4476 days | |
0.0 | 0% |
| Elise | 10/10 | 4476 days | |
0.0 | 0% |
| Fung | 8/10 | 4476 days | |
0.0 | 0% |
| Peter Aston | 9/10 | 4476 days | |
0.0 | 0% |
| Tony Wicks | 8/10 | 4481 days | |
0.0 | 0% |
| Sue | 8/10 | 4488 days | |
0.0 | 0% |
| Carla | 9/10 | 4496 days | |
0.0 | 0% |
| Melissa Steedman | 9/10 | 4523 days | |
0.0 | 0% |
| Vanessa Brennan | 7/10 | 4523 days | |
0.0 | 0% |
| Tim | 9/10 | 4524 days | |
0.0 | 0% |
| Mary | 10/10 | 4574 days | |
0.0 | 0% |
| Agnes | 9/10 | 4790 days | |
0.0 | 0% |
| Cohen | 9/10 | 4810 days | |
0.0 | 0% |
| John | 8/10 | 4814 days | |
0.0 | 0% |
| SueLinsk | 9/10 | 4814 days | |
0.0 | 0% |
| Frauke | 7/10 | 4856 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
-2.34% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 110 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 | -2.31% |
| 198 | -2.32% |
| 199 | -2.33% |
| 200 | -2.34% |
| 201 | -2.36% |
| 202 | -2.37% |
| 203 | -2.38% |
| … | … |
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.