Ranking Score Explained

Hi there, 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.

Nick Morrison's avatar

Nick Morrison

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

99.74%

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 Face-to-Face Weight Relative Weight
Michael Halligan 10/10 1086 days 5.01 77%
Marianne Leclerco 10/10 1153 days true 5.9 100%
Steven Goossens 10/10 1178 days 4.89 74%
Chris Ru 10/10 1178 days 4.89 74%
Christin Winter 10/10 1179 days 4.88 74%
Maud Eskes 10/10 1239 days 4.8 72%
Brooke Dees 10/10 1239 days 4.8 72%
Johanna Mabille 10/10 1271 days 4.76 71%
Felix Eberhard 10/10 1331 days 4.68 69%
Danny Hughes 10/10 1392 days 4.59 67%
Lee Gilson 10/10 1392 days 4.59 67%
Magalie Gilles 10/10 1392 days 4.59 67%
Anthony Baker 10/10 1392 days 4.59 67%
Matthew Durham 10/10 1392 days 4.59 67%
Weston Newman 10/10 1393 days 4.59 67%
Lydia Downey 10/10 1423 days 4.55 66%
Jon S 10/10 1423 days 4.55 66%
Kevin Hopper 10/10 1451 days 4.51 65%
Marion Butz 10/10 1451 days 4.51 65%
James Martin 10/10 1482 days 4.47 64%
Joel Tennant 10/10 1482 days 4.47 64%
Dominique Brandl 10/10 1543 days 4.39 61%
Christine Zumbeck 10/10 1543 days 4.39 61%
Philip Ayles 10/10 1574 days 4.34 60%
Hayden 10/10 1604 days 4.3 59%
bryce 10/10 1636 days 4.26 58%
Gunther Kothen 10/10 1758 days 4.09 54%
Charli & Ben 10/10 1758 days 4.09 54%
Dave Macleod 10/10 1758 days 4.09 54%
rick kaminer 10/10 1817 days 4.01 52%
Josch Beh 10/10 1817 days 4.01 52%
Matthew Blaikie 10/10 1817 days 4.01 52%
Mandy Dawson 9/10 1817 days 4.01 52%
Tess Idiens 10/10 1847 days 3.97 51%
Mikaël Krummen 10/10 1848 days 3.97 51%
Brian Barnard 10/10 1940 days 3.84 48%
Alix 10/10 1940 days 3.84 48%
sebastian krause 10/10 2032 days 3.72 44%
Annika Strönisch 10/10 2032 days 3.72 44%
Sarah Ling 10/10 2062 days 3.68 43%
Lydia Lowe 10/10 2093 days 3.63 42%
Debbie hogan 10/10 2123 days 3.59 41%
Ellen Herrlin 10/10 2123 days 3.59 41%
Brendon 10/10 2154 days 3.55 40%
Rob 10/10 2154 days 3.55 40%
JamesR 10/10 2154 days 3.55 40%
david kirk 10/10 2154 days 3.55 40%
Bhakti Patel 10/10 2182 days 3.51 39%
bernd 10/10 2182 days 3.51 39%
Amy Coolidge 10/10 2182 days 3.51 39%
Don Mueller 10/10 2182 days 3.51 39%
Katie Morgan 10/10 2212 days 3.47 38%
barbara nielsen 10/10 2213 days 3.47 38%
Stine Bøttern 10/10 2213 days 3.47 38%
embatfish 10/10 2244 days 3.43 37%
christie wood 10/10 2244 days 3.43 37%
Mellow 10/10 2274 days 3.38 36%
MelNZ 10/10 2366 days 3.26 33%
ToGy 10/10 2519 days 3.05 27%
EtienneCornu 10/10 2548 days 3.01 26%
francis 10/10 2579 days 2.97 25%
melika 10/10 2579 days 2.97 25%
esty6 10/10 2579 days 2.97 25%
cerys1979 10/10 2579 days 2.97 25%
jamieroysimmonds 10/10 2610 days 2.92 24%
rudling36 10/10 2671 days 2.84 22%
sftyler 10/10 2671 days 2.84 22%
eoolsen 10/10 2701 days 2.8 21%
jmark 10/10 2701 days 2.8 21%
GenoReynoldo 10/10 2701 days 2.8 21%
Kiedo 10/10 2793 days 2.67 18%
gillwalsh 10/10 2824 days 2.63 17%
ocds4321 10/10 2824 days 2.63 17%
toquade 10/10 2854 days 2.59 16%
Tajon 10/10 2854 days 2.59 16%
aragonesa 10/10 2854 days 2.59 16%
Kris_Lim 10/10 2854 days 2.59 16%
Glen_Mitchell 10/10 2885 days 2.55 15%
baz15 10/10 2885 days 2.55 15%
hoellund 10/10 2913 days 2.51 14%
bttrix 10/10 2913 days 2.51 14%
nigel275 9/10 2913 days 2.51 14%
leonsenchenko 10/10 2913 days 2.51 14%
lightoverloard 10/10 2913 days 2.51 14%
Lodesman 10/10 2944 days 2.47 13%
rivendell 10/10 2944 days 2.47 13%
illgetubutla 10/10 2944 days 2.47 13%
drross 10/10 2975 days 2.42 12%
nickjjjjbbbb 10/10 2975 days 2.42 12%
berniesheehan 10/10 3005 days 2.38 11%
JeanLouis 10/10 3005 days 2.38 11%
OliviaDW 10/10 3005 days 2.38 11%
Scaife 10/10 3005 days 2.38 11%
Kristien 10/10 3005 days 2.38 11%
Malcolm Glad 9/10 3263 days true 2.44 12%
Alan_Maich 10/10 3309 days 1.97 0%

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

-7.28% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 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 364 days.

The Dive North experience has been adjusted for 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

Final Ranking Score

92%

The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.