Hi, 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 Dolphin Eco Cruise.
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.
Dolphin Eco Cruise
Valid Reviews
91 Valid Reviews
The Dolphin Eco Cruise experience has a total of 93 reviews. There are 91 valid reviews that are included when calculating the ranking score and 2 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 91 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 15 |
|
16% |
| 9/10 | 26 |
|
29% |
| 8/10 | 25 |
|
27% |
| 7/10 | 12 |
|
13% |
| 6/10 | 4 |
|
4% |
| 5/10 | 2 |
|
2% |
| 4/10 | 4 |
|
4% |
| 3/10 | 3 |
|
3% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
79.89% Average
The raw data average (mean) for all the Dolphin Eco Cruise valid reviews is 79.89% and is based on 91 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
80 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 91 valid reviews, the experience has 80 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 80 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 12 |
|
15% |
| 9/10 | 25 |
|
31% |
| 8/10 | 24 |
|
30% |
| 7/10 | 10 |
|
13% |
| 6/10 | 3 |
|
4% |
| 5/10 | 1 |
|
1% |
| 4/10 | 4 |
|
5% |
| 3/10 | 1 |
|
1% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
81.13% Average
The raw data average (mean) for all the Dolphin Eco Cruise face-to-face reviews is 81.13% and is based on 80 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
81.56%
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 |
|---|---|---|---|
| Nadja Guiliani | 4/10 | 3524 days | 66% |
| Ben Blackwell | 8/10 | 3538 days | 100% |
| mathieu boustie | 5/10 | 3635 days | 67% |
| Mattias | 7/10 | 4246 days | 10% |
| Arnaud Memay | 7/10 | 4327 days | 0% |
| Susser | 8/10 | 4327 days | 0% |
| Samuel Fritscher | 9/10 | 4635 days | 59% |
| Fabian and Teresa | 10/10 | 4661 days | 59% |
| Joroen Borkert | 7/10 | 4717 days | 55% |
| Faassen | 8/10 | 4738 days | 58% |
| Ben Simons | 9/10 | 5001 days | 59% |
| Martin Beuker | 4/10 | 5011 days | 37% |
| Romla | 8/10 | 5012 days | 58% |
| Marie Dutron | 8/10 | 5015 days | 58% |
| Preben vil Helmsen | 10/10 | 5017 days | 59% |
| Rick & Suus | 8/10 | 5018 days | 58% |
| Nora | 9/10 | 5018 days | 59% |
| Barry Baily | 9/10 | 5018 days | 59% |
| Christiane & Dirk | 8/10 | 5019 days | 58% |
| Scott Simpson | 5/10 | 5022 days | 44% |
| Wolfgang Beute | 8/10 | 5022 days | 58% |
| batzi | 3/10 | 5126 days | 30% |
| bow | 3/10 | 5279 days | 30% |
| Nick van de Belt | 9/10 | 5348 days | 59% |
| Patrick Gloede | 9/10 | 5354 days | 59% |
| Stoop | 9/10 | 5357 days | 59% |
| Siegfried Tuiel | 10/10 | 5360 days | 59% |
| Laura Leigh | 6/10 | 5364 days | 50% |
| John Taylor | 7/10 | 5370 days | 55% |
| Jon_and_Family | 7/10 | 5371 days | 55% |
| Marjan Van Den Braak | 4/10 | 5372 days | 37% |
| Wouter Teensma | 8/10 | 5375 days | 58% |
| Ann Parry | 10/10 | 5375 days | 59% |
| Rob | 8/10 | 5386 days | 58% |
| Alan & Gill Geach | 7/10 | 5393 days | 55% |
| Sarah Ewing | 9/10 | 5396 days | 59% |
| John N | 8/10 | 5730 days | 58% |
| Elisabeth Egerup | 10/10 | 5743 days | 59% |
| Wielink | 8/10 | 5744 days | 58% |
| Pierre Pilon | 9/10 | 5744 days | 59% |
| Pascal Auber | 8/10 | 5750 days | 58% |
| Lamb | 9/10 | 5763 days | 59% |
| Tonny | 8/10 | 5763 days | 58% |
| Dawn Campbell | 10/10 | 5795 days | 59% |
| guichard | 7/10 | 5815 days | 55% |
| HairyHaggis | 10/10 | 5826 days | 59% |
| katepat | 10/10 | 5826 days | 59% |
| Colin S | 10/10 | 5834 days | 59% |
| Ulyate | 6/10 | 5837 days | 50% |
| Alex D'Souza | 7/10 | 5887 days | 55% |
| Patrick | 9/10 | 5917 days | 59% |
| billdee | 10/10 | 5948 days | 59% |
| EvertG | 8/10 | 6051 days | 58% |
| KatrinK | 10/10 | 6063 days | 59% |
| David | 8/10 | 6070 days | 58% |
| neeltjec | 9/10 | 6070 days | 59% |
| monikav | 10/10 | 6070 days | 59% |
| Martien van Brakel | 9/10 | 6070 days | 59% |
| kymberlyw | 9/10 | 6071 days | 59% |
| Katy1 | 8/10 | 6072 days | 58% |
| Anneleen | 8/10 | 6100 days | 58% |
| RosC | 6/10 | 6105 days | 50% |
| Simon | 9/10 | 6119 days | 59% |
| Gunhild | 9/10 | 6134 days | 59% |
| Lars | 10/10 | 6137 days | 59% |
| Miha | 7/10 | 6175 days | 55% |
| Ana | 7/10 | 6182 days | 55% |
| Cindy | 9/10 | 6183 days | 59% |
| Mark | 9/10 | 6201 days | 59% |
| Stephanie Schikora | 10/10 | 6213 days | 59% |
| Rhys Howell | 6/10 | 6404 days | 50% |
| Ben | 9/10 | 6441 days | 59% |
| Vikki | 10/10 | 6446 days | 59% |
| Kelly Noirin | 8/10 | 6457 days | 58% |
| Ohad | 9/10 | 6463 days | 59% |
| Trinkler | 9/10 | 6463 days | 59% |
| Nancy Dol | 9/10 | 6467 days | 59% |
| George Clark | 7/10 | 6467 days | 55% |
| Kathy Hawey | 8/10 | 6469 days | 58% |
| Myrtille de Vries | 9/10 | 6474 days | 59% |
| Buys | 9/10 | 6475 days | 59% |
| Haemnerli | 8/10 | 6475 days | 58% |
| Vaclaf | 9/10 | 6481 days | 59% |
| Jenny Hulsebosch | 9/10 | 6498 days | 59% |
| Willemien | 8/10 | 6562 days | 58% |
| Vern | 7/10 | 6672 days | 55% |
| James | 8/10 | 6672 days | 58% |
| Rietveld | 8/10 | 6828 days | 58% |
| Janne | 8/10 | 6840 days | 58% |
| Nina | 3/10 | 6842 days | 30% |
| Inga | 4/10 | 6842 days | 37% |
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 Dolphin Eco Cruise experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-3.99% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 45 days. However the Dolphin Eco Cruise 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 Dolphin Eco Cruise experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.93% |
| 198 | -3.95% |
| 199 | -3.97% |
| 200 | -3.99% |
| 201 | -4.01% |
| 202 | -4.03% |
| 203 | -4.05% |
| … | … |
Balancing Adjustment
3.73% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
81%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.