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
90.18%
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 | 654 days | 100% |
| Amanda Walden | 10/10 | 1537 days | 11% |
| Monique Pos | 9/10 | 1627 days | 10% |
| Alison Egan-Jones | 9/10 | 1657 days | 10% |
| Sylvain Schiber | 9/10 | 1658 days | 10% |
| Sylvain Chanton | 10/10 | 1663 days | 10% |
| Julian Gury | 8/10 | 1671 days | 9% |
| R. Damen | 9/10 | 1688 days | 10% |
| Michelle Smit | 10/10 | 1749 days | 10% |
| Gesa Roemer | 8/10 | 1879 days | 8% |
| Anais Roux | 10/10 | 1884 days | 9% |
| Luca Staudt | 8/10 | 1903 days | 8% |
| Florian Bisault | 7/10 | 1904 days | 8% |
| Anna Jungclaus | 9/10 | 1911 days | 9% |
| Signe Broedbaek | 7/10 | 1913 days | 8% |
| Petra Fragner | 10/10 | 1919 days | 9% |
| Koehler Ute | 10/10 | 1931 days | 9% |
| Niclas Ullno | 8/10 | 1934 days | 8% |
| Tamara | 7/10 | 1935 days | 8% |
| Chloe Guerillot | 9/10 | 1945 days | 8% |
| Luisa and Hannes | 9/10 | 1958 days | 8% |
| elena salimzhanova | 10/10 | 1962 days | 8% |
| Jakub Trojanek | 8/10 | 1973 days | 8% |
| Malina | 10/10 | 1979 days | 8% |
| Emma Keegan | 7/10 | 2237 days | 6% |
| Emilie Normand | 7/10 | 2308 days | 6% |
| Christopher Buch Madsen | 8/10 | 2629 days | 4% |
| Phil Bromby | 9/10 | 2631 days | 5% |
| Tobias Thull | 7/10 | 2637 days | 4% |
| Rita Hochstiasser | 8/10 | 2659 days | 4% |
| Nelle Dutilleur | 10/10 | 2680 days | 4% |
| Mathias Butterlin | 8/10 | 2680 days | 4% |
| Daryl | 8/10 | 2688 days | 4% |
| Bert Pubeg | 9/10 | 2754 days | 4% |
| Alex | 8/10 | 3058 days | 2% |
| Lucie | 9/10 | 3094 days | 2% |
| Henzen | 9/10 | 3098 days | 2% |
| Roy Barton | 9/10 | 3361 days | 1% |
| Brian Livesey | 9/10 | 3369 days | 1% |
| Merlyn | 8/10 | 3377 days | 0% |
| Beyeler | 10/10 | 3381 days | 1% |
| Ralf Glaser | 7/10 | 3381 days | 0% |
| Suzanne van Kol | 8/10 | 3386 days | 0% |
| kiwifrenchy | 10/10 | 3393 days | 0% |
| _mel_ | 9/10 | 3424 days | 0% |
| C | 10/10 | 3424 days | 0% |
| Sarah and Soren | 10/10 | 3461 days | 0% |
| Erik Folkersen | 10/10 | 3469 days | 0% |
| Rudlinger | 10/10 | 3472 days | 0% |
| GenH | 10/10 | 3699 days | 2% |
| R Tearle | 10/10 | 3708 days | 2% |
| Franzi & Tobi | 10/10 | 3710 days | 2% |
| Nathalie | 10/10 | 3714 days | 2% |
| Ven | 9/10 | 3716 days | 2% |
| Jerven and Kim | 10/10 | 3723 days | 2% |
| Sarah Luijckx | 1/10 | 3725 days | 1% |
| Alan Jeffery | 7/10 | 3726 days | 2% |
| Birgette Weiner | 9/10 | 3744 days | 2% |
| Tim Van Nispen | 9/10 | 3746 days | 2% |
| Bottcher | 10/10 | 3746 days | 2% |
| Sue & Graham Mullin | 10/10 | 3753 days | 2% |
| John Simpson | 9/10 | 3755 days | 2% |
| Karen Phillips | 9/10 | 3755 days | 2% |
| Michelle Booty | 8/10 | 3757 days | 2% |
| Nadia Husain | 7/10 | 3758 days | 2% |
| Dietmar Gans | 10/10 | 4064 days | 2% |
| Matt Roper | 10/10 | 4086 days | 2% |
| Chris Glasg | 10/10 | 4103 days | 2% |
| Jamie Hallifax | 9/10 | 4114 days | 2% |
| Paul Ritchie | 10/10 | 4118 days | 2% |
| Gerry Donoghue | 10/10 | 4137 days | 2% |
| Yvonne German | 9/10 | 4140 days | 2% |
| DebbieM | 5/10 | 4154 days | 1% |
| mj111 | 10/10 | 4154 days | 2% |
| Susann Koschmeider | 10/10 | 4189 days | 2% |
| X Otte | 10/10 | 4193 days | 2% |
| Hans Hoff | 10/10 | 4193 days | 2% |
| Solveig Mosinski | 10/10 | 4197 days | 2% |
| Val and Barnie Weir | 10/10 | 4208 days | 2% |
| Wim Put | 9/10 | 4211 days | 2% |
| discerner | 10/10 | 4215 days | 2% |
| Phillip Reade | 10/10 | 4215 days | 2% |
| Tim Beuzeval | 9/10 | 4215 days | 2% |
| barp | 9/10 | 4246 days | 2% |
| Becky Fairweather | 10/10 | 4399 days | 2% |
| David | 10/10 | 4429 days | 2% |
| martinat | 10/10 | 4429 days | 2% |
| Mike | 9/10 | 4438 days | 2% |
| MichaelS1 | 9/10 | 4445 days | 2% |
| StefanieGermany | 9/10 | 4446 days | 2% |
| Veronika | 9/10 | 4448 days | 2% |
| Ralph Boese | 7/10 | 4449 days | 2% |
| ToyalFrance | 9/10 | 4449 days | 2% |
| ReneeA | 9/10 | 4477 days | 2% |
| Lorna | 8/10 | 4478 days | 2% |
| Bruce | 10/10 | 4479 days | 2% |
| Sandra | 10/10 | 4486 days | 2% |
| Heidi | 7/10 | 4493 days | 2% |
| Philipp | 9/10 | 4493 days | 2% |
| Simon | 9/10 | 4495 days | 2% |
| Kathryn | 8/10 | 4496 days | 2% |
| Barbara | 9/10 | 4501 days | 2% |
| Joachim | 10/10 | 4501 days | 2% |
| Ans | 7/10 | 4502 days | 2% |
| Minder | 10/10 | 4503 days | 2% |
| Evi | 7/10 | 4534 days | 2% |
| Ann Maree | 9/10 | 4537 days | 2% |
| Trine | 9/10 | 4547 days | 2% |
| Carina Korn | 10/10 | 4644 days | 2% |
| Christian | 7/10 | 4644 days | 2% |
| Nick | 10/10 | 4647 days | 2% |
| Terri Scott | 7/10 | 4664 days | 2% |
| Alan Bellerby | 10/10 | 4815 days | 2% |
| Robert | 4/10 | 4821 days | 1% |
| Elise | 10/10 | 4821 days | 2% |
| Fung | 8/10 | 4821 days | 2% |
| Peter Aston | 9/10 | 4821 days | 2% |
| Tony Wicks | 8/10 | 4826 days | 2% |
| Sue | 8/10 | 4833 days | 2% |
| Carla | 9/10 | 4841 days | 2% |
| Melissa Steedman | 9/10 | 4868 days | 2% |
| Vanessa Brennan | 7/10 | 4868 days | 2% |
| Tim | 9/10 | 4869 days | 2% |
| Mary | 10/10 | 4919 days | 2% |
| Agnes | 9/10 | 5135 days | 2% |
| Cohen | 9/10 | 5155 days | 2% |
| John | 8/10 | 5159 days | 2% |
| SueLinsk | 9/10 | 5159 days | 2% |
| Frauke | 7/10 | 5201 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
-2.76% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 93 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 | -2.72% |
| 198 | -2.73% |
| 199 | -2.74% |
| 200 | -2.76% |
| 201 | -2.77% |
| 202 | -2.79% |
| 203 | -2.80% |
| … | … |
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.