G'day, 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 Doubtful Sound Overnight 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.
Doubtful Sound Overnight Cruise
Valid Reviews
89 Valid Reviews
The Doubtful Sound Overnight Cruise experience has a total of 89 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 89 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 55 |
|
62% |
| 9/10 | 25 |
|
28% |
| 8/10 | 8 |
|
9% |
| 7/10 | 0 |
|
0% |
| 6/10 | 1 |
|
1% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
94.94% Average
The raw data average (mean) for all the Doubtful Sound Overnight Cruise valid reviews is 94.94% and is based on 89 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
74 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 89 valid reviews, the experience has 74 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 74 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 44 |
|
59% |
| 9/10 | 22 |
|
30% |
| 8/10 | 8 |
|
11% |
| 7/10 | 0 |
|
0% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
94.86% Average
The raw data average (mean) for all the Doubtful Sound Overnight Cruise face-to-face reviews is 94.86% and is based on 74 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
95.20%
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 | Relative Weight |
|---|---|---|---|
| Jonny Horn | 9/10 | 3094 days | 100% |
| Hazel Norman | 10/10 | 3109 days | 100% |
| James Jackson | 10/10 | 3110 days | 100% |
| Bartlomiej Berger | 9/10 | 3805 days | 31% |
| Ann Wilson | 8/10 | 4061 days | 6% |
| Anne and Steve Bartlett | 9/10 | 4126 days | 0% |
| Abby Rescr | 9/10 | 4440 days | 25% |
| Frederick Dean | 8/10 | 4440 days | 24% |
| Joey Mertzig | 10/10 | 4457 days | 25% |
| Rien | 9/10 | 4797 days | 25% |
| Clausen | 9/10 | 4798 days | 25% |
| kiwifrenchy | 10/10 | 4805 days | 25% |
| Sam | 10/10 | 4809 days | 25% |
| Pete & Pat Etheridge | 10/10 | 4814 days | 25% |
| Mike & Jennie | 9/10 | 4816 days | 25% |
| Stefes Wencke | 10/10 | 4818 days | 25% |
| Uwe Henze | 10/10 | 4819 days | 25% |
| Manuela Weber | 10/10 | 4819 days | 25% |
| Thyg Lingdal | 10/10 | 4833 days | 25% |
| caro | 10/10 | 4865 days | 25% |
| Dean | 9/10 | 4880 days | 25% |
| Anna Bret | 8/10 | 4905 days | 24% |
| Jaime Castells | 9/10 | 4905 days | 25% |
| Gary Koehler | 10/10 | 5162 days | 25% |
| jlgavin | 6/10 | 5171 days | 18% |
| Verheyen | 10/10 | 5175 days | 25% |
| Chris Darlington | 10/10 | 5179 days | 25% |
| Dieter Uhlmann | 9/10 | 5182 days | 25% |
| Angi Otti | 10/10 | 5190 days | 25% |
| Jackie Morris | 10/10 | 5190 days | 25% |
| Samuel Prechel | 10/10 | 5191 days | 25% |
| David Glover | 10/10 | 5193 days | 25% |
| Claus Olsen | 10/10 | 5194 days | 25% |
| H Schepers | 9/10 | 5195 days | 25% |
| georgiarose89 | 10/10 | 5230 days | 25% |
| chrissie2011 | 10/10 | 5230 days | 25% |
| Chris | 10/10 | 5449 days | 25% |
| Sabine | 10/10 | 5449 days | 25% |
| Kevin & Chris | 9/10 | 5469 days | 25% |
| davidm239 | 9/10 | 5475 days | 25% |
| Margie | 10/10 | 5514 days | 25% |
| Agnes | 8/10 | 5515 days | 24% |
| Graeme + Jane Ryan | 10/10 | 5526 days | 25% |
| Westermann | 10/10 | 5527 days | 25% |
| Peter Brown | 10/10 | 5532 days | 25% |
| johnandgin | 10/10 | 5536 days | 25% |
| Angela | 10/10 | 5537 days | 25% |
| T. Timmers | 9/10 | 5550 days | 25% |
| Loleit | 10/10 | 5557 days | 25% |
| David Valentine | 10/10 | 5558 days | 25% |
| Annette Schmitt | 9/10 | 5558 days | 25% |
| Jeremy & Sarah Rind | 10/10 | 5563 days | 25% |
| Jessica | 9/10 | 5569 days | 25% |
| ChristinaO | 10/10 | 5595 days | 25% |
| Simon Jones | 9/10 | 5595 days | 25% |
| Jerry | 10/10 | 5626 days | 25% |
| HairyHaggis | 9/10 | 5656 days | 25% |
| Suzanne | 10/10 | 5687 days | 25% |
| Traveller Girl | 10/10 | 5840 days | 25% |
| Switz | 10/10 | 5854 days | 25% |
| DanielGermany | 10/10 | 5862 days | 25% |
| CornelissenS | 9/10 | 5887 days | 25% |
| Inger | 10/10 | 5887 days | 25% |
| Robert | 9/10 | 5901 days | 25% |
| Theresa | 9/10 | 5907 days | 25% |
| Sue | 9/10 | 5909 days | 25% |
| Inger Skov | 10/10 | 5913 days | 25% |
| Ruben | 8/10 | 5943 days | 24% |
| Claire | 10/10 | 5956 days | 25% |
| C Digby | 9/10 | 5960 days | 25% |
| Adam | 10/10 | 6001 days | 25% |
| Stephanie Schikora | 10/10 | 6013 days | 25% |
| Sue Stewart | 10/10 | 6120 days | 25% |
| James Gibbs | 8/10 | 6212 days | 24% |
| Helen | 9/10 | 6220 days | 25% |
| Menashe | 10/10 | 6240 days | 25% |
| George Jeffs | 10/10 | 6249 days | 25% |
| Paul Weston | 9/10 | 6263 days | 25% |
| Marian Mckinney | 10/10 | 6263 days | 25% |
| Charles Price | 8/10 | 6274 days | 24% |
| Vicky Elliott | 10/10 | 6281 days | 25% |
| Anne Mainwaring | 10/10 | 6289 days | 25% |
| Kilsby | 10/10 | 6298 days | 25% |
| Dupre | 8/10 | 6339 days | 24% |
| dieter | 10/10 | 6357 days | 25% |
| Rene Schotvanger | 10/10 | 6472 days | 25% |
| Pat Brewster | 10/10 | 6472 days | 25% |
| Paul Yacoumis | 10/10 | 6598 days | 25% |
| Sandra | 10/10 | 6607 days | 25% |
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 Doubtful Sound Overnight Cruise experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-3.20% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 74 days. However the Doubtful Sound Overnight 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 Doubtful Sound Overnight Cruise experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.16% |
| 198 | -3.17% |
| 199 | -3.19% |
| 200 | -3.20% |
| 201 | -3.22% |
| 202 | -3.24% |
| 203 | -3.25% |
| … | … |
Balancing Adjustment
0.75% 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
93%
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.