Ranking Score Explained

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.

Cymen Crick's avatar

Cymen Crick

Rankers Owner

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

99.75%

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 3216 days 100%
Marianne Leclerco 10/10 3282 days 57%
Steven Goossens 10/10 3308 days 92%
Chris Ru 10/10 3308 days 92%
Christin Winter 10/10 3308 days 92%
Maud Eskes 10/10 3369 days 87%
Brooke Dees 10/10 3369 days 87%
Johanna Mabille 10/10 3400 days 84%
Felix Eberhard 10/10 3461 days 79%
Danny Hughes 10/10 3522 days 74%
Lee Gilson 10/10 3522 days 74%
Magalie Gilles 10/10 3522 days 74%
Anthony Baker 10/10 3522 days 74%
Matthew Durham 10/10 3522 days 74%
Weston Newman 10/10 3522 days 74%
Lydia Downey 10/10 3553 days 71%
Jon S 10/10 3553 days 71%
Kevin Hopper 10/10 3581 days 68%
Marion Butz 10/10 3581 days 68%
James Martin 10/10 3612 days 66%
Joel Tennant 10/10 3612 days 66%
Dominique Brandl 10/10 3673 days 61%
Christine Zumbeck 10/10 3673 days 61%
Philip Ayles 10/10 3704 days 58%
Hayden 10/10 3734 days 55%
bryce 10/10 3765 days 53%
Gunther Kothen 10/10 3887 days 42%
Charli & Ben 10/10 3887 days 42%
Dave Macleod 10/10 3887 days 42%
rick kaminer 10/10 3946 days 37%
Josch Beh 10/10 3946 days 37%
Matthew Blaikie 10/10 3946 days 37%
Mandy Dawson 9/10 3946 days 37%
Tess Idiens 10/10 3977 days 34%
Mikaël Krummen 10/10 3977 days 34%
Brian Barnard 10/10 4069 days 26%
Alix 10/10 4069 days 26%
sebastian krause 10/10 4161 days 18%
Annika Strönisch 10/10 4161 days 18%
Sarah Ling 10/10 4191 days 16%
Lydia Lowe 10/10 4222 days 13%
Debbie hogan 10/10 4252 days 10%
Ellen Herrlin 10/10 4252 days 10%
Brendon 10/10 4283 days 8%
Rob 10/10 4283 days 8%
JamesR 10/10 4283 days 8%
david kirk 10/10 4283 days 8%
Bhakti Patel 10/10 4311 days 5%
bernd 10/10 4311 days 5%
Amy Coolidge 10/10 4311 days 5%
Don Mueller 10/10 4311 days 5%
Katie Morgan 10/10 4342 days 3%
barbara nielsen 10/10 4342 days 3%
Stine Bøttern 10/10 4342 days 3%
embatfish 10/10 4373 days 0%
christie wood 10/10 4373 days 0%
Mellow 10/10 4403 days 44%
MelNZ 10/10 4495 days 44%
ToGy 10/10 4648 days 44%
EtienneCornu 10/10 4677 days 44%
francis 10/10 4708 days 44%
melika 10/10 4708 days 44%
esty6 10/10 4708 days 44%
cerys1979 10/10 4708 days 44%
jamieroysimmonds 10/10 4739 days 44%
rudling36 10/10 4800 days 44%
sftyler 10/10 4800 days 44%
eoolsen 10/10 4830 days 44%
jmark 10/10 4830 days 44%
GenoReynoldo 10/10 4830 days 44%
Kiedo 10/10 4922 days 44%
gillwalsh 10/10 4953 days 44%
ocds4321 10/10 4953 days 44%
toquade 10/10 4983 days 44%
Tajon 10/10 4983 days 44%
aragonesa 10/10 4983 days 44%
Kris_Lim 10/10 4983 days 44%
Glen_Mitchell 10/10 5014 days 44%
baz15 10/10 5014 days 44%
hoellund 10/10 5042 days 44%
bttrix 10/10 5042 days 44%
nigel275 9/10 5042 days 43%
leonsenchenko 10/10 5042 days 44%
lightoverloard 10/10 5042 days 44%
Lodesman 10/10 5073 days 44%
rivendell 10/10 5073 days 44%
illgetubutla 10/10 5073 days 44%
drross 10/10 5104 days 44%
nickjjjjbbbb 10/10 5104 days 44%
berniesheehan 10/10 5134 days 44%
JeanLouis 10/10 5134 days 44%
OliviaDW 10/10 5134 days 44%
Scaife 10/10 5134 days 44%
Kristien 10/10 5134 days 44%
Malcolm Glad 9/10 5392 days 26%
Alan_Maich 10/10 5438 days 44%

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 43 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

0.37% 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.