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
81.74%
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 | 3860 days | 26% |
| Ben Blackwell | 8/10 | 3874 days | 94% |
| mathieu boustie | 5/10 | 3971 days | 14% |
| Mattias | 7/10 | 4582 days | 85% |
| Arnaud Memay | 7/10 | 4663 days | 85% |
| Susser | 8/10 | 4663 days | 96% |
| Samuel Fritscher | 9/10 | 4971 days | 98% |
| Fabian and Teresa | 10/10 | 4997 days | 100% |
| Joroen Borkert | 7/10 | 5053 days | 85% |
| Faassen | 8/10 | 5074 days | 96% |
| Ben Simons | 9/10 | 5337 days | 98% |
| Martin Beuker | 4/10 | 5347 days | 24% |
| Romla | 8/10 | 5348 days | 96% |
| Marie Dutron | 8/10 | 5351 days | 96% |
| Preben vil Helmsen | 10/10 | 5353 days | 100% |
| Rick & Suus | 8/10 | 5354 days | 96% |
| Nora | 9/10 | 5354 days | 98% |
| Barry Baily | 9/10 | 5354 days | 98% |
| Christiane & Dirk | 8/10 | 5355 days | 96% |
| Scott Simpson | 5/10 | 5358 days | 48% |
| Wolfgang Beute | 8/10 | 5358 days | 96% |
| batzi | 3/10 | 5462 days | 0% |
| bow | 3/10 | 5615 days | 0% |
| Nick van de Belt | 9/10 | 5684 days | 98% |
| Patrick Gloede | 9/10 | 5690 days | 98% |
| Stoop | 9/10 | 5693 days | 98% |
| Siegfried Tuiel | 10/10 | 5696 days | 100% |
| Laura Leigh | 6/10 | 5700 days | 70% |
| John Taylor | 7/10 | 5706 days | 85% |
| Jon_and_Family | 7/10 | 5707 days | 85% |
| Marjan Van Den Braak | 4/10 | 5708 days | 24% |
| Wouter Teensma | 8/10 | 5711 days | 96% |
| Ann Parry | 10/10 | 5711 days | 100% |
| Rob | 8/10 | 5722 days | 96% |
| Alan & Gill Geach | 7/10 | 5729 days | 85% |
| Sarah Ewing | 9/10 | 5732 days | 98% |
| John N | 8/10 | 6066 days | 96% |
| Elisabeth Egerup | 10/10 | 6079 days | 100% |
| Wielink | 8/10 | 6080 days | 96% |
| Pierre Pilon | 9/10 | 6080 days | 98% |
| Pascal Auber | 8/10 | 6086 days | 96% |
| Lamb | 9/10 | 6099 days | 98% |
| Tonny | 8/10 | 6099 days | 96% |
| Dawn Campbell | 10/10 | 6131 days | 100% |
| guichard | 7/10 | 6151 days | 85% |
| HairyHaggis | 10/10 | 6162 days | 100% |
| katepat | 10/10 | 6162 days | 100% |
| Colin S | 10/10 | 6170 days | 100% |
| Ulyate | 6/10 | 6173 days | 70% |
| Alex D'Souza | 7/10 | 6223 days | 85% |
| Patrick | 9/10 | 6253 days | 98% |
| billdee | 10/10 | 6284 days | 100% |
| EvertG | 8/10 | 6387 days | 96% |
| KatrinK | 10/10 | 6399 days | 100% |
| David | 8/10 | 6406 days | 96% |
| neeltjec | 9/10 | 6406 days | 98% |
| monikav | 10/10 | 6406 days | 100% |
| Martien van Brakel | 9/10 | 6406 days | 98% |
| kymberlyw | 9/10 | 6408 days | 98% |
| Katy1 | 8/10 | 6408 days | 96% |
| Anneleen | 8/10 | 6437 days | 96% |
| RosC | 6/10 | 6441 days | 70% |
| Simon | 9/10 | 6456 days | 98% |
| Gunhild | 9/10 | 6471 days | 98% |
| Lars | 10/10 | 6474 days | 100% |
| Miha | 7/10 | 6511 days | 85% |
| Ana | 7/10 | 6519 days | 85% |
| Cindy | 9/10 | 6520 days | 98% |
| Mark | 9/10 | 6538 days | 98% |
| Stephanie Schikora | 10/10 | 6549 days | 100% |
| Rhys Howell | 6/10 | 6740 days | 70% |
| Ben | 9/10 | 6777 days | 98% |
| Vikki | 10/10 | 6782 days | 100% |
| Kelly Noirin | 8/10 | 6793 days | 96% |
| Ohad | 9/10 | 6799 days | 98% |
| Trinkler | 9/10 | 6799 days | 98% |
| Nancy Dol | 9/10 | 6803 days | 98% |
| George Clark | 7/10 | 6803 days | 85% |
| Kathy Hawey | 8/10 | 6805 days | 96% |
| Myrtille de Vries | 9/10 | 6810 days | 98% |
| Buys | 9/10 | 6811 days | 98% |
| Haemnerli | 8/10 | 6811 days | 96% |
| Vaclaf | 9/10 | 6817 days | 98% |
| Jenny Hulsebosch | 9/10 | 6834 days | 98% |
| Willemien | 8/10 | 6898 days | 96% |
| Vern | 7/10 | 7008 days | 85% |
| James | 8/10 | 7008 days | 96% |
| Rietveld | 8/10 | 7164 days | 96% |
| Janne | 8/10 | 7176 days | 96% |
| Nina | 3/10 | 7178 days | 0% |
| Inga | 4/10 | 7178 days | 24% |
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
-3.56% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 59 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 | -3.51% |
| 198 | -3.53% |
| 199 | -3.55% |
| 200 | -3.56% |
| 201 | -3.58% |
| 202 | -3.60% |
| 203 | -3.62% |
| … | … |
Balancing Adjustment
3.54% 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
82%
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.