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

99.83%

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 1620 days 3.97 100%
Marianne Leclerco 10/10 1687 days true 3.84 97%
Steven Goossens 10/10 1712 days 3.79 95%
Chris Ru 10/10 1712 days 3.79 95%
Christin Winter 10/10 1713 days 3.79 95%
Maud Eskes 10/10 1773 days 3.67 92%
Brooke Dees 10/10 1773 days 3.67 92%
Johanna Mabille 10/10 1805 days 3.61 91%
Felix Eberhard 10/10 1865 days 3.49 88%
Danny Hughes 10/10 1926 days 3.37 85%
Lee Gilson 10/10 1926 days 3.37 85%
Magalie Gilles 10/10 1926 days 3.37 85%
Anthony Baker 10/10 1926 days 3.37 85%
Matthew Durham 10/10 1926 days 3.37 85%
Weston Newman 10/10 1927 days 3.37 85%
Lydia Downey 10/10 1957 days 3.31 83%
Jon S 10/10 1957 days 3.31 83%
Kevin Hopper 10/10 1985 days 3.26 82%
Marion Butz 10/10 1985 days 3.26 82%
James Martin 10/10 2016 days 3.2 80%
Joel Tennant 10/10 2016 days 3.2 80%
Dominique Brandl 10/10 2077 days 3.08 77%
Christine Zumbeck 10/10 2077 days 3.08 77%
Philip Ayles 10/10 2108 days 3.02 76%
Hayden 10/10 2138 days 2.96 74%
bryce 10/10 2170 days 2.9 73%
Gunther Kothen 10/10 2292 days 2.66 67%
Charli & Ben 10/10 2292 days 2.66 67%
Dave Macleod 10/10 2292 days 2.66 67%
rick kaminer 10/10 2351 days 2.54 64%
Josch Beh 10/10 2351 days 2.54 64%
Matthew Blaikie 10/10 2351 days 2.54 64%
Mandy Dawson 9/10 2351 days 2.54 64%
Tess Idiens 10/10 2381 days 2.48 63%
Mikaël Krummen 10/10 2382 days 2.48 62%
Brian Barnard 10/10 2474 days 2.3 58%
Alix 10/10 2474 days 2.3 58%
sebastian krause 10/10 2566 days 2.12 53%
Annika Strönisch 10/10 2566 days 2.12 53%
Sarah Ling 10/10 2596 days 2.06 52%
Lydia Lowe 10/10 2627 days 2.0 50%
Debbie hogan 10/10 2657 days 1.94 49%
Ellen Herrlin 10/10 2657 days 1.94 49%
Brendon 10/10 2688 days 1.88 47%
Rob 10/10 2688 days 1.88 47%
JamesR 10/10 2688 days 1.88 47%
david kirk 10/10 2688 days 1.88 47%
Bhakti Patel 10/10 2716 days 1.83 46%
bernd 10/10 2716 days 1.83 46%
Amy Coolidge 10/10 2716 days 1.83 46%
Don Mueller 10/10 2716 days 1.83 46%
Katie Morgan 10/10 2746 days 1.77 45%
barbara nielsen 10/10 2747 days 1.77 44%
Stine Bøttern 10/10 2747 days 1.77 44%
embatfish 10/10 2778 days 1.71 43%
christie wood 10/10 2778 days 1.71 43%
Mellow 10/10 2808 days 1.65 41%
MelNZ 10/10 2900 days 1.47 37%
ToGy 10/10 3053 days 1.17 29%
EtienneCornu 10/10 3082 days 1.11 28%
francis 10/10 3113 days 1.05 26%
melika 10/10 3113 days 1.05 26%
esty6 10/10 3113 days 1.05 26%
cerys1979 10/10 3113 days 1.05 26%
jamieroysimmonds 10/10 3144 days 0.99 25%
rudling36 10/10 3205 days 0.87 22%
sftyler 10/10 3205 days 0.87 22%
eoolsen 10/10 3235 days 0.81 20%
jmark 10/10 3235 days 0.81 20%
GenoReynoldo 10/10 3235 days 0.81 20%
Kiedo 10/10 3327 days 0.63 16%
gillwalsh 10/10 3358 days 0.57 14%
ocds4321 10/10 3358 days 0.57 14%
toquade 10/10 3388 days 0.51 13%
Tajon 10/10 3388 days 0.51 13%
aragonesa 10/10 3388 days 0.51 13%
Kris_Lim 10/10 3388 days 0.51 13%
Glen_Mitchell 10/10 3419 days 0.45 11%
baz15 10/10 3419 days 0.45 11%
hoellund 10/10 3447 days 0.4 10%
bttrix 10/10 3447 days 0.4 10%
nigel275 9/10 3447 days 0.4 10%
leonsenchenko 10/10 3447 days 0.4 10%
lightoverloard 10/10 3447 days 0.4 10%
Lodesman 10/10 3478 days 0.34 8%
rivendell 10/10 3478 days 0.34 8%
illgetubutla 10/10 3478 days 0.34 8%
drross 10/10 3509 days 0.28 7%
nickjjjjbbbb 10/10 3509 days 0.28 7%
berniesheehan 10/10 3539 days 0.22 5%
JeanLouis 10/10 3539 days 0.22 5%
OliviaDW 10/10 3539 days 0.22 5%
Scaife 10/10 3539 days 0.22 5%
Kristien 10/10 3539 days 0.22 5%
Malcolm Glad 9/10 3797 days true 0.0 0%
Alan_Maich 10/10 3843 days 0.0 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

-2.00% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 125 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 -1.97%
198 -1.98%
199 -1.99%
200 -2.00%
201 -2.01%
202 -2.02%
203 -2.03%

Final Ranking Score

98%

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.