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

99.77%

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 10/10 753 days 100%
Marianne Leclerco 10/10 819 days 86%
Steven Goossens 10/10 845 days 59%
Chris Ru 10/10 845 days 59%
Christin Winter 10/10 845 days 59%
Maud Eskes 10/10 906 days 39%
Brooke Dees 10/10 906 days 39%
Johanna Mabille 10/10 937 days 31%
Felix Eberhard 10/10 998 days 19%
Danny Hughes 10/10 1059 days 13%
Lee Gilson 10/10 1059 days 13%
Magalie Gilles 10/10 1059 days 13%
Anthony Baker 10/10 1059 days 13%
Matthew Durham 10/10 1059 days 13%
Weston Newman 10/10 1059 days 13%
Lydia Downey 10/10 1090 days 12%
Jon S 10/10 1090 days 12%
Kevin Hopper 10/10 1118 days 12%
Marion Butz 10/10 1118 days 12%
James Martin 10/10 1149 days 12%
Joel Tennant 10/10 1149 days 12%
Dominique Brandl 10/10 1210 days 11%
Christine Zumbeck 10/10 1210 days 11%
Philip Ayles 10/10 1241 days 11%
Hayden 10/10 1271 days 11%
bryce 10/10 1302 days 11%
Gunther Kothen 10/10 1424 days 10%
Charli & Ben 10/10 1424 days 10%
Dave Macleod 10/10 1424 days 10%
rick kaminer 10/10 1483 days 10%
Josch Beh 10/10 1483 days 10%
Matthew Blaikie 10/10 1483 days 10%
Mandy Dawson 9/10 1483 days 10%
Tess Idiens 10/10 1514 days 9%
Mikaël Krummen 10/10 1514 days 9%
Brian Barnard 10/10 1606 days 9%
Alix 10/10 1606 days 9%
sebastian krause 10/10 1698 days 8%
Annika Strönisch 10/10 1698 days 8%
Sarah Ling 10/10 1728 days 8%
Lydia Lowe 10/10 1759 days 8%
Debbie hogan 10/10 1789 days 8%
Ellen Herrlin 10/10 1789 days 8%
Brendon 10/10 1820 days 7%
Rob 10/10 1820 days 7%
JamesR 10/10 1820 days 7%
david kirk 10/10 1820 days 7%
Bhakti Patel 10/10 1848 days 7%
bernd 10/10 1848 days 7%
Amy Coolidge 10/10 1848 days 7%
Don Mueller 10/10 1848 days 7%
Katie Morgan 10/10 1879 days 7%
barbara nielsen 10/10 1879 days 7%
Stine Bøttern 10/10 1879 days 7%
embatfish 10/10 1910 days 7%
christie wood 10/10 1910 days 7%
Mellow 10/10 1940 days 7%
MelNZ 10/10 2032 days 6%
ToGy 10/10 2185 days 5%
EtienneCornu 10/10 2214 days 5%
francis 10/10 2245 days 5%
melika 10/10 2245 days 5%
esty6 10/10 2245 days 5%
cerys1979 10/10 2245 days 5%
jamieroysimmonds 10/10 2276 days 5%
rudling36 10/10 2337 days 4%
sftyler 10/10 2337 days 4%
eoolsen 10/10 2367 days 4%
jmark 10/10 2367 days 4%
GenoReynoldo 10/10 2367 days 4%
Kiedo 10/10 2459 days 3%
gillwalsh 10/10 2490 days 3%
ocds4321 10/10 2490 days 3%
toquade 10/10 2520 days 3%
Tajon 10/10 2520 days 3%
aragonesa 10/10 2520 days 3%
Kris_Lim 10/10 2520 days 3%
Glen_Mitchell 10/10 2551 days 3%
baz15 10/10 2551 days 3%
hoellund 10/10 2579 days 3%
bttrix 10/10 2579 days 3%
nigel275 9/10 2579 days 3%
leonsenchenko 10/10 2579 days 3%
lightoverloard 10/10 2579 days 3%
Lodesman 10/10 2610 days 2%
rivendell 10/10 2610 days 2%
illgetubutla 10/10 2610 days 2%
drross 10/10 2641 days 2%
nickjjjjbbbb 10/10 2641 days 2%
berniesheehan 10/10 2671 days 2%
JeanLouis 10/10 2671 days 2%
OliviaDW 10/10 2671 days 2%
Scaife 10/10 2671 days 2%
Kristien 10/10 2671 days 2%
Malcolm Glad 9/10 2929 days 3%
Alan_Maich 10/10 2975 days 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.