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 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
99.80%
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 | 3597 days | 100% |
| Marianne Leclerco | 10/10 | 3663 days | 54% |
| Steven Goossens | 10/10 | 3689 days | 88% |
| Chris Ru | 10/10 | 3689 days | 88% |
| Christin Winter | 10/10 | 3689 days | 88% |
| Maud Eskes | 10/10 | 3750 days | 80% |
| Brooke Dees | 10/10 | 3750 days | 80% |
| Johanna Mabille | 10/10 | 3781 days | 76% |
| Felix Eberhard | 10/10 | 3842 days | 68% |
| Danny Hughes | 10/10 | 3903 days | 60% |
| Lee Gilson | 10/10 | 3903 days | 60% |
| Magalie Gilles | 10/10 | 3903 days | 60% |
| Anthony Baker | 10/10 | 3903 days | 60% |
| Matthew Durham | 10/10 | 3903 days | 60% |
| Weston Newman | 10/10 | 3903 days | 60% |
| Lydia Downey | 10/10 | 3934 days | 56% |
| Jon S | 10/10 | 3934 days | 56% |
| Kevin Hopper | 10/10 | 3962 days | 52% |
| Marion Butz | 10/10 | 3962 days | 52% |
| James Martin | 10/10 | 3993 days | 48% |
| Joel Tennant | 10/10 | 3993 days | 48% |
| Dominique Brandl | 10/10 | 4054 days | 40% |
| Christine Zumbeck | 10/10 | 4054 days | 40% |
| Philip Ayles | 10/10 | 4085 days | 36% |
| Hayden | 10/10 | 4115 days | 32% |
| bryce | 10/10 | 4146 days | 28% |
| Gunther Kothen | 10/10 | 4268 days | 12% |
| Charli & Ben | 10/10 | 4268 days | 12% |
| Dave Macleod | 10/10 | 4268 days | 12% |
| rick kaminer | 10/10 | 4327 days | 4% |
| Josch Beh | 10/10 | 4327 days | 4% |
| Matthew Blaikie | 10/10 | 4327 days | 4% |
| Mandy Dawson | 9/10 | 4327 days | 4% |
| Tess Idiens | 10/10 | 4358 days | 0% |
| Mikaël Krummen | 10/10 | 4358 days | 0% |
| Brian Barnard | 10/10 | 4450 days | 64% |
| Alix | 10/10 | 4450 days | 64% |
| sebastian krause | 10/10 | 4542 days | 64% |
| Annika Strönisch | 10/10 | 4542 days | 64% |
| Sarah Ling | 10/10 | 4572 days | 64% |
| Lydia Lowe | 10/10 | 4603 days | 64% |
| Debbie hogan | 10/10 | 4633 days | 64% |
| Ellen Herrlin | 10/10 | 4633 days | 64% |
| Brendon | 10/10 | 4664 days | 64% |
| Rob | 10/10 | 4664 days | 64% |
| JamesR | 10/10 | 4664 days | 64% |
| david kirk | 10/10 | 4664 days | 64% |
| Bhakti Patel | 10/10 | 4692 days | 64% |
| bernd | 10/10 | 4692 days | 64% |
| Amy Coolidge | 10/10 | 4692 days | 64% |
| Don Mueller | 10/10 | 4692 days | 64% |
| Katie Morgan | 10/10 | 4723 days | 64% |
| barbara nielsen | 10/10 | 4723 days | 64% |
| Stine Bøttern | 10/10 | 4723 days | 64% |
| embatfish | 10/10 | 4754 days | 64% |
| christie wood | 10/10 | 4754 days | 64% |
| Mellow | 10/10 | 4784 days | 64% |
| MelNZ | 10/10 | 4876 days | 64% |
| ToGy | 10/10 | 5029 days | 64% |
| EtienneCornu | 10/10 | 5058 days | 64% |
| francis | 10/10 | 5089 days | 64% |
| melika | 10/10 | 5089 days | 64% |
| esty6 | 10/10 | 5089 days | 64% |
| cerys1979 | 10/10 | 5089 days | 64% |
| jamieroysimmonds | 10/10 | 5120 days | 64% |
| rudling36 | 10/10 | 5181 days | 64% |
| sftyler | 10/10 | 5181 days | 64% |
| eoolsen | 10/10 | 5211 days | 64% |
| jmark | 10/10 | 5211 days | 64% |
| GenoReynoldo | 10/10 | 5211 days | 64% |
| Kiedo | 10/10 | 5303 days | 64% |
| gillwalsh | 10/10 | 5334 days | 64% |
| ocds4321 | 10/10 | 5334 days | 64% |
| toquade | 10/10 | 5364 days | 64% |
| Tajon | 10/10 | 5364 days | 64% |
| aragonesa | 10/10 | 5364 days | 64% |
| Kris_Lim | 10/10 | 5364 days | 64% |
| Glen_Mitchell | 10/10 | 5395 days | 64% |
| baz15 | 10/10 | 5395 days | 64% |
| hoellund | 10/10 | 5423 days | 64% |
| bttrix | 10/10 | 5423 days | 64% |
| nigel275 | 9/10 | 5423 days | 64% |
| leonsenchenko | 10/10 | 5423 days | 64% |
| lightoverloard | 10/10 | 5423 days | 64% |
| Lodesman | 10/10 | 5454 days | 64% |
| rivendell | 10/10 | 5454 days | 64% |
| illgetubutla | 10/10 | 5454 days | 64% |
| drross | 10/10 | 5485 days | 64% |
| nickjjjjbbbb | 10/10 | 5485 days | 64% |
| berniesheehan | 10/10 | 5515 days | 64% |
| JeanLouis | 10/10 | 5515 days | 64% |
| OliviaDW | 10/10 | 5515 days | 64% |
| Scaife | 10/10 | 5515 days | 64% |
| Kristien | 10/10 | 5515 days | 64% |
| Malcolm Glad | 9/10 | 5773 days | 37% |
| Alan_Maich | 10/10 | 5819 days | 64% |
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
-4.07% 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
0.37% 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.