Ranking Score Explained
Kia ora 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
89.07%
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 | 1067 days | 100% |
| Amanda Walden | 10/10 | 1950 days | 63% |
| Monique Pos | 9/10 | 2040 days | 59% |
| Alison Egan-Jones | 9/10 | 2070 days | 58% |
| Sylvain Schiber | 9/10 | 2071 days | 58% |
| Sylvain Chanton | 10/10 | 2076 days | 58% |
| Julian Gury | 8/10 | 2084 days | 54% |
| R. Damen | 9/10 | 2101 days | 57% |
| Michelle Smit | 10/10 | 2162 days | 54% |
| Gesa Roemer | 8/10 | 2292 days | 46% |
| Anais Roux | 10/10 | 2297 days | 49% |
| Luca Staudt | 8/10 | 2316 days | 46% |
| Florian Bisault | 7/10 | 2317 days | 43% |
| Anna Jungclaus | 9/10 | 2324 days | 48% |
| Signe Broedbaek | 7/10 | 2326 days | 43% |
| Petra Fragner | 10/10 | 2332 days | 48% |
| Koehler Ute | 10/10 | 2344 days | 47% |
| Niclas Ullno | 8/10 | 2347 days | 44% |
| Tamara | 7/10 | 2348 days | 42% |
| Chloe Guerillot | 9/10 | 2358 days | 47% |
| Luisa and Hannes | 9/10 | 2371 days | 46% |
| elena salimzhanova | 10/10 | 2375 days | 46% |
| Jakub Trojanek | 8/10 | 2386 days | 43% |
| Malina | 10/10 | 2392 days | 45% |
| Emma Keegan | 7/10 | 2650 days | 31% |
| Emilie Normand | 7/10 | 2721 days | 28% |
| Christopher Buch Madsen | 8/10 | 3042 days | 18% |
| Phil Bromby | 9/10 | 3044 days | 19% |
| Tobias Thull | 7/10 | 3050 days | 16% |
| Rita Hochstiasser | 8/10 | 3072 days | 17% |
| Nelle Dutilleur | 10/10 | 3093 days | 17% |
| Mathias Butterlin | 8/10 | 3093 days | 16% |
| Daryl | 8/10 | 3101 days | 15% |
| Bert Pubeg | 9/10 | 3167 days | 14% |
| Alex | 8/10 | 3471 days | 1% |
| Lucie | 9/10 | 3507 days | 0% |
| Henzen | 9/10 | 3511 days | 0% |
| Roy Barton | 9/10 | 3774 days | 15% |
| Brian Livesey | 9/10 | 3782 days | 15% |
| Merlyn | 8/10 | 3790 days | 14% |
| Beyeler | 10/10 | 3794 days | 15% |
| Ralf Glaser | 7/10 | 3794 days | 13% |
| Suzanne van Kol | 8/10 | 3799 days | 14% |
| kiwifrenchy | 10/10 | 3806 days | 15% |
| _mel_ | 9/10 | 3837 days | 15% |
| C | 10/10 | 3837 days | 15% |
| Sarah and Soren | 10/10 | 3874 days | 15% |
| Erik Folkersen | 10/10 | 3882 days | 15% |
| Rudlinger | 10/10 | 3885 days | 15% |
| GenH | 10/10 | 4112 days | 15% |
| R Tearle | 10/10 | 4121 days | 15% |
| Franzi & Tobi | 10/10 | 4123 days | 15% |
| Nathalie | 10/10 | 4127 days | 15% |
| Ven | 9/10 | 4129 days | 15% |
| Jerven and Kim | 10/10 | 4136 days | 15% |
| Sarah Luijckx | 1/10 | 4138 days | 9% |
| Alan Jeffery | 7/10 | 4139 days | 13% |
| Birgette Weiner | 9/10 | 4157 days | 15% |
| Tim Van Nispen | 9/10 | 4159 days | 15% |
| Bottcher | 10/10 | 4159 days | 15% |
| Sue & Graham Mullin | 10/10 | 4166 days | 15% |
| John Simpson | 9/10 | 4168 days | 15% |
| Karen Phillips | 9/10 | 4168 days | 15% |
| Michelle Booty | 8/10 | 4170 days | 14% |
| Nadia Husain | 7/10 | 4171 days | 13% |
| Dietmar Gans | 10/10 | 4477 days | 15% |
| Matt Roper | 10/10 | 4499 days | 15% |
| Chris Glasg | 10/10 | 4516 days | 15% |
| Jamie Hallifax | 9/10 | 4527 days | 15% |
| Paul Ritchie | 10/10 | 4531 days | 15% |
| Gerry Donoghue | 10/10 | 4550 days | 15% |
| Yvonne German | 9/10 | 4553 days | 15% |
| DebbieM | 5/10 | 4567 days | 11% |
| mj111 | 10/10 | 4567 days | 15% |
| Susann Koschmeider | 10/10 | 4602 days | 15% |
| X Otte | 10/10 | 4606 days | 15% |
| Hans Hoff | 10/10 | 4606 days | 15% |
| Solveig Mosinski | 10/10 | 4610 days | 15% |
| Val and Barnie Weir | 10/10 | 4621 days | 15% |
| Wim Put | 9/10 | 4624 days | 15% |
| discerner | 10/10 | 4628 days | 15% |
| Phillip Reade | 10/10 | 4628 days | 15% |
| Tim Beuzeval | 9/10 | 4628 days | 15% |
| barp | 9/10 | 4659 days | 15% |
| Becky Fairweather | 10/10 | 4812 days | 15% |
| David | 10/10 | 4842 days | 15% |
| martinat | 10/10 | 4842 days | 15% |
| Mike | 9/10 | 4851 days | 15% |
| MichaelS1 | 9/10 | 4858 days | 15% |
| StefanieGermany | 9/10 | 4859 days | 15% |
| Veronika | 9/10 | 4861 days | 15% |
| Ralph Boese | 7/10 | 4862 days | 13% |
| ToyalFrance | 9/10 | 4862 days | 15% |
| ReneeA | 9/10 | 4890 days | 15% |
| Lorna | 8/10 | 4891 days | 14% |
| Bruce | 10/10 | 4892 days | 15% |
| Sandra | 10/10 | 4899 days | 15% |
| Heidi | 7/10 | 4906 days | 13% |
| Philipp | 9/10 | 4906 days | 15% |
| Simon | 9/10 | 4908 days | 15% |
| Kathryn | 8/10 | 4909 days | 14% |
| Barbara | 9/10 | 4914 days | 15% |
| Joachim | 10/10 | 4914 days | 15% |
| Ans | 7/10 | 4915 days | 13% |
| Minder | 10/10 | 4916 days | 15% |
| Evi | 7/10 | 4947 days | 13% |
| Ann Maree | 9/10 | 4950 days | 15% |
| Trine | 9/10 | 4960 days | 15% |
| Carina Korn | 10/10 | 5058 days | 15% |
| Christian | 7/10 | 5058 days | 13% |
| Nick | 10/10 | 5060 days | 15% |
| Terri Scott | 7/10 | 5077 days | 13% |
| Alan Bellerby | 10/10 | 5228 days | 15% |
| Robert | 4/10 | 5234 days | 11% |
| Elise | 10/10 | 5234 days | 15% |
| Fung | 8/10 | 5234 days | 14% |
| Peter Aston | 9/10 | 5234 days | 15% |
| Tony Wicks | 8/10 | 5239 days | 14% |
| Sue | 8/10 | 5246 days | 14% |
| Carla | 9/10 | 5254 days | 15% |
| Melissa Steedman | 9/10 | 5281 days | 15% |
| Vanessa Brennan | 7/10 | 5281 days | 13% |
| Tim | 9/10 | 5282 days | 15% |
| Mary | 10/10 | 5332 days | 15% |
| Agnes | 9/10 | 5548 days | 15% |
| Cohen | 9/10 | 5568 days | 15% |
| John | 8/10 | 5572 days | 14% |
| SueLinsk | 9/10 | 5572 days | 15% |
| Frauke | 7/10 | 5614 days | 13% |
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
-2.03% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 123 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 | -1.99% |
| 198 | -2.00% |
| 199 | -2.02% |
| 200 | -2.03% |
| 201 | -2.04% |
| 202 | -2.05% |
| 203 | -2.06% |
| … | … |
Final Ranking Score
87%
The final ranking score once any adjustments, ratings, 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.