Kia ora, 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
99.77%
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 | 3287 days | 100% |
| Marianne Leclerco | 10/10 | 3354 days | 56% |
| Steven Goossens | 10/10 | 3379 days | 91% |
| Chris Ru | 10/10 | 3379 days | 91% |
| Christin Winter | 10/10 | 3380 days | 91% |
| Maud Eskes | 10/10 | 3440 days | 86% |
| Brooke Dees | 10/10 | 3440 days | 86% |
| Johanna Mabille | 10/10 | 3472 days | 83% |
| Felix Eberhard | 10/10 | 3532 days | 77% |
| Danny Hughes | 10/10 | 3593 days | 71% |
| Lee Gilson | 10/10 | 3593 days | 71% |
| Magalie Gilles | 10/10 | 3593 days | 71% |
| Anthony Baker | 10/10 | 3593 days | 71% |
| Matthew Durham | 10/10 | 3593 days | 71% |
| Weston Newman | 10/10 | 3594 days | 71% |
| Lydia Downey | 10/10 | 3624 days | 68% |
| Jon S | 10/10 | 3624 days | 68% |
| Kevin Hopper | 10/10 | 3652 days | 66% |
| Marion Butz | 10/10 | 3652 days | 66% |
| James Martin | 10/10 | 3683 days | 63% |
| Joel Tennant | 10/10 | 3683 days | 63% |
| Dominique Brandl | 10/10 | 3744 days | 57% |
| Christine Zumbeck | 10/10 | 3744 days | 57% |
| Philip Ayles | 10/10 | 3775 days | 54% |
| Hayden | 10/10 | 3805 days | 51% |
| bryce | 10/10 | 3837 days | 49% |
| Gunther Kothen | 10/10 | 3959 days | 37% |
| Charli & Ben | 10/10 | 3959 days | 37% |
| Dave Macleod | 10/10 | 3959 days | 37% |
| rick kaminer | 10/10 | 4018 days | 32% |
| Josch Beh | 10/10 | 4018 days | 32% |
| Matthew Blaikie | 10/10 | 4018 days | 32% |
| Mandy Dawson | 9/10 | 4018 days | 31% |
| Tess Idiens | 10/10 | 4048 days | 29% |
| Mikaël Krummen | 10/10 | 4049 days | 29% |
| Brian Barnard | 10/10 | 4141 days | 20% |
| Alix | 10/10 | 4141 days | 20% |
| sebastian krause | 10/10 | 4233 days | 11% |
| Annika Strönisch | 10/10 | 4233 days | 11% |
| Sarah Ling | 10/10 | 4263 days | 9% |
| Lydia Lowe | 10/10 | 4294 days | 6% |
| Debbie hogan | 10/10 | 4324 days | 3% |
| Ellen Herrlin | 10/10 | 4324 days | 3% |
| Brendon | 10/10 | 4355 days | 0% |
| Rob | 10/10 | 4355 days | 0% |
| JamesR | 10/10 | 4355 days | 0% |
| david kirk | 10/10 | 4355 days | 0% |
| Bhakti Patel | 10/10 | 4383 days | 46% |
| bernd | 10/10 | 4383 days | 46% |
| Amy Coolidge | 10/10 | 4383 days | 46% |
| Don Mueller | 10/10 | 4383 days | 46% |
| Katie Morgan | 10/10 | 4413 days | 46% |
| barbara nielsen | 10/10 | 4414 days | 46% |
| Stine Bøttern | 10/10 | 4414 days | 46% |
| embatfish | 10/10 | 4445 days | 46% |
| christie wood | 10/10 | 4445 days | 46% |
| Mellow | 10/10 | 4475 days | 46% |
| MelNZ | 10/10 | 4567 days | 46% |
| ToGy | 10/10 | 4720 days | 46% |
| EtienneCornu | 10/10 | 4749 days | 46% |
| francis | 10/10 | 4780 days | 46% |
| melika | 10/10 | 4780 days | 46% |
| esty6 | 10/10 | 4780 days | 46% |
| cerys1979 | 10/10 | 4780 days | 46% |
| jamieroysimmonds | 10/10 | 4811 days | 46% |
| rudling36 | 10/10 | 4872 days | 46% |
| sftyler | 10/10 | 4872 days | 46% |
| eoolsen | 10/10 | 4902 days | 46% |
| jmark | 10/10 | 4902 days | 46% |
| GenoReynoldo | 10/10 | 4902 days | 46% |
| Kiedo | 10/10 | 4994 days | 46% |
| gillwalsh | 10/10 | 5025 days | 46% |
| ocds4321 | 10/10 | 5025 days | 46% |
| toquade | 10/10 | 5055 days | 46% |
| Tajon | 10/10 | 5055 days | 46% |
| aragonesa | 10/10 | 5055 days | 46% |
| Kris_Lim | 10/10 | 5055 days | 46% |
| Glen_Mitchell | 10/10 | 5086 days | 46% |
| baz15 | 10/10 | 5086 days | 46% |
| hoellund | 10/10 | 5114 days | 46% |
| bttrix | 10/10 | 5114 days | 46% |
| nigel275 | 9/10 | 5114 days | 45% |
| leonsenchenko | 10/10 | 5114 days | 46% |
| lightoverloard | 10/10 | 5114 days | 46% |
| Lodesman | 10/10 | 5145 days | 46% |
| rivendell | 10/10 | 5145 days | 46% |
| illgetubutla | 10/10 | 5145 days | 46% |
| drross | 10/10 | 5176 days | 46% |
| nickjjjjbbbb | 10/10 | 5176 days | 46% |
| berniesheehan | 10/10 | 5206 days | 46% |
| JeanLouis | 10/10 | 5206 days | 46% |
| OliviaDW | 10/10 | 5206 days | 46% |
| Scaife | 10/10 | 5206 days | 46% |
| Kristien | 10/10 | 5206 days | 46% |
| Malcolm Glad | 9/10 | 5464 days | 26% |
| Alan_Maich | 10/10 | 5510 days | 46% |
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
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 50 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 | -4.08% |
| 198 | -4.10% |
| 199 | -4.12% |
| 200 | -4.14% |
| 201 | -4.16% |
| 202 | -4.18% |
| 203 | -4.20% |
| … | … |
Balancing Adjustment
0.38% 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.