Hey, 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 Dive North.
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.
Dive North
Valid Reviews
96 Valid Reviews
The Dive North experience has a total of 96 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.
Within these 96 valid reviews, the experience has 2 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 96 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 93 |
|
97% |
| 9/10 | 3 |
|
3% |
| 8/10 | 0 |
|
0% |
| 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% |
99.69% Average
The raw data average (mean) for all the Dive North valid reviews is 99.69% and is based on 96 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Weighted Average
99.81%
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 |
|---|---|---|---|
| Michael Halligan | 10/10 | 3607 days | 100% |
| Marianne Leclerco | 10/10 | 3674 days | 55% |
| Steven Goossens | 10/10 | 3699 days | 88% |
| Chris Ru | 10/10 | 3699 days | 88% |
| Christin Winter | 10/10 | 3700 days | 88% |
| Maud Eskes | 10/10 | 3760 days | 80% |
| Brooke Dees | 10/10 | 3760 days | 80% |
| Johanna Mabille | 10/10 | 3792 days | 76% |
| Felix Eberhard | 10/10 | 3852 days | 68% |
| Danny Hughes | 10/10 | 3913 days | 60% |
| Lee Gilson | 10/10 | 3913 days | 60% |
| Magalie Gilles | 10/10 | 3913 days | 60% |
| Anthony Baker | 10/10 | 3913 days | 60% |
| Matthew Durham | 10/10 | 3913 days | 60% |
| Weston Newman | 10/10 | 3914 days | 60% |
| Lydia Downey | 10/10 | 3944 days | 56% |
| Jon S | 10/10 | 3944 days | 56% |
| Kevin Hopper | 10/10 | 3972 days | 52% |
| Marion Butz | 10/10 | 3972 days | 52% |
| James Martin | 10/10 | 4003 days | 48% |
| Joel Tennant | 10/10 | 4003 days | 48% |
| Dominique Brandl | 10/10 | 4064 days | 40% |
| Christine Zumbeck | 10/10 | 4064 days | 40% |
| Philip Ayles | 10/10 | 4095 days | 36% |
| Hayden | 10/10 | 4125 days | 32% |
| bryce | 10/10 | 4157 days | 28% |
| Gunther Kothen | 10/10 | 4279 days | 12% |
| Charli & Ben | 10/10 | 4279 days | 12% |
| Dave Macleod | 10/10 | 4279 days | 12% |
| rick kaminer | 10/10 | 4338 days | 4% |
| Josch Beh | 10/10 | 4338 days | 4% |
| Matthew Blaikie | 10/10 | 4338 days | 4% |
| Mandy Dawson | 9/10 | 4338 days | 4% |
| Tess Idiens | 10/10 | 4368 days | 0% |
| Mikaël Krummen | 10/10 | 4369 days | 0% |
| Brian Barnard | 10/10 | 4461 days | 66% |
| Alix | 10/10 | 4461 days | 66% |
| sebastian krause | 10/10 | 4553 days | 66% |
| Annika Strönisch | 10/10 | 4553 days | 66% |
| Sarah Ling | 10/10 | 4583 days | 66% |
| Lydia Lowe | 10/10 | 4614 days | 66% |
| Debbie hogan | 10/10 | 4644 days | 66% |
| Ellen Herrlin | 10/10 | 4644 days | 66% |
| Brendon | 10/10 | 4675 days | 66% |
| Rob | 10/10 | 4675 days | 66% |
| JamesR | 10/10 | 4675 days | 66% |
| david kirk | 10/10 | 4675 days | 66% |
| Bhakti Patel | 10/10 | 4703 days | 66% |
| bernd | 10/10 | 4703 days | 66% |
| Amy Coolidge | 10/10 | 4703 days | 66% |
| Don Mueller | 10/10 | 4703 days | 66% |
| Katie Morgan | 10/10 | 4733 days | 66% |
| barbara nielsen | 10/10 | 4734 days | 66% |
| Stine Bøttern | 10/10 | 4734 days | 66% |
| embatfish | 10/10 | 4765 days | 66% |
| christie wood | 10/10 | 4765 days | 66% |
| Mellow | 10/10 | 4795 days | 66% |
| MelNZ | 10/10 | 4887 days | 66% |
| ToGy | 10/10 | 5040 days | 66% |
| EtienneCornu | 10/10 | 5069 days | 66% |
| francis | 10/10 | 5100 days | 66% |
| melika | 10/10 | 5100 days | 66% |
| esty6 | 10/10 | 5100 days | 66% |
| cerys1979 | 10/10 | 5100 days | 66% |
| jamieroysimmonds | 10/10 | 5131 days | 66% |
| rudling36 | 10/10 | 5192 days | 66% |
| sftyler | 10/10 | 5192 days | 66% |
| eoolsen | 10/10 | 5222 days | 66% |
| jmark | 10/10 | 5222 days | 66% |
| GenoReynoldo | 10/10 | 5222 days | 66% |
| Kiedo | 10/10 | 5314 days | 66% |
| gillwalsh | 10/10 | 5345 days | 66% |
| ocds4321 | 10/10 | 5345 days | 66% |
| toquade | 10/10 | 5375 days | 66% |
| Tajon | 10/10 | 5375 days | 66% |
| aragonesa | 10/10 | 5375 days | 66% |
| Kris_Lim | 10/10 | 5375 days | 66% |
| Glen_Mitchell | 10/10 | 5406 days | 66% |
| baz15 | 10/10 | 5406 days | 66% |
| hoellund | 10/10 | 5434 days | 66% |
| bttrix | 10/10 | 5434 days | 66% |
| nigel275 | 9/10 | 5434 days | 65% |
| leonsenchenko | 10/10 | 5434 days | 66% |
| lightoverloard | 10/10 | 5434 days | 66% |
| Lodesman | 10/10 | 5465 days | 66% |
| rivendell | 10/10 | 5465 days | 66% |
| illgetubutla | 10/10 | 5465 days | 66% |
| drross | 10/10 | 5496 days | 66% |
| nickjjjjbbbb | 10/10 | 5496 days | 66% |
| berniesheehan | 10/10 | 5526 days | 66% |
| JeanLouis | 10/10 | 5526 days | 66% |
| OliviaDW | 10/10 | 5526 days | 66% |
| Scaife | 10/10 | 5526 days | 66% |
| Kristien | 10/10 | 5526 days | 66% |
| Malcolm Glad | 9/10 | 5784 days | 38% |
| Alan_Maich | 10/10 | 5830 days | 66% |
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 Dive North experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the Dive North 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 Dive North experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
0.36% 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
96%
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.