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 Tutukaka.

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 Tutukaka

Valid Reviews

86 Valid Reviews

The Dive Tutukaka experience has a total of 86 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.

Below is the distribution of ratings for the 86 valid reviews:

Rating Count Percentage
10/10 38
44%
9/10 28
33%
8/10 15
17%
7/10 2
2%
6/10 1
1%
5/10 1
1%
4/10 0
0%
3/10 1
1%
2/10 0
0%
1/10 0
0%

90.70% Average

The raw data average (mean) for all the Dive Tutukaka valid reviews is 90.70% and is based on 86 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Face-to-Face Reviews

72 Face-to-Face Reviews

The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.

More about face-to-face reviews

Within the 86 valid reviews, the experience has 72 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 72 face-to-face reviews:

Rating Count Percentage
10/10 28
39%
9/10 26
36%
8/10 14
19%
7/10 1
1%
6/10 1
1%
5/10 1
1%
4/10 0
0%
3/10 1
1%
2/10 0
0%
1/10 0
0%

89.86% Average

The raw data average (mean) for all the Dive Tutukaka face-to-face reviews is 89.86% and is based on 72 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

90.68%

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
Cherie and Dan 10/10 336 days 100%
Netta Tyler 10/10 388 days 77%
Theerada Wongkaew 10/10 430 days 86%
Gazmira Molina 8/10 473 days 78%
Jessica Nasstrom 8/10 480 days 77%
Adeline 8/10 485 days 76%
Rebecca Pierce 10/10 511 days 59%
Jane Simmons 10/10 633 days 39%
Julia Clark 9/10 701 days 29%
Kristina Breitwieser 10/10 706 days 34%
Olivier Anciaux 7/10 719 days 33%
Justine Hoffmann 9/10 751 days 28%
Ruven Rintelmann 9/10 756 days 27%
Niels Hoogendooen 8/10 769 days 26%
Marie Brauherr 10/10 777 days 25%
Luisa and Hannes 8/10 781 days 24%
Christian Boudreau 9/10 799 days 22%
Manuela Opprecht 7/10 1131 days 4%
Damaris Mayer 3/10 1131 days 4%
Sophie Huybrechts 10/10 1173 days 5%
Ally Cook 9/10 1177 days 5%
Jessie Sabine 9/10 1476 days 4%
Katrina Gamby 10/10 1834 days 4%
Sonia Sennane 10/10 2188 days 3%
Melanie Friessen 9/10 2189 days 3%
Barry Baily 10/10 2200 days 3%
Elisabeth 9/10 2209 days 3%
Lotte Foged 8/10 2214 days 3%
Anika 8/10 2215 days 3%
Paul 8/10 2285 days 3%
Elke & Charlotte 9/10 2298 days 3%
Kris Gijbels 9/10 2531 days 3%
Patrick Gloede 10/10 2536 days 2%
Norm and Sky 9/10 2541 days 2%
Roald and Ellen 9/10 2542 days 2%
B Kleven 10/10 2547 days 2%
Ann-Katrine & Sille 10/10 2551 days 2%
Erland Ostberg 8/10 2555 days 2%
Helene Descamps 9/10 2569 days 2%
Heather Deobald 9/10 2571 days 2%
Christina Fischer 6/10 2576 days 2%
Shoe 10/10 2643 days 2%
RobThexton 10/10 2796 days 2%
Martin 9/10 2857 days 2%
cpochin 10/10 2887 days 1%
John Casey 10/10 2899 days 2%
Peter Schmidt 10/10 2918 days 1%
Elisabeth Egerup 10/10 2925 days 2%
Vera Van Schie 10/10 2926 days 2%
Chris Glasg 10/10 2926 days 2%
Klass 9/10 2932 days 2%
Belinda Godhard 9/10 2943 days 2%
Theta 9/10 2946 days 1%
jamesg 9/10 3006 days 2%
Mille Winther 10/10 3019 days 2%
Christine Van Den Berg Michele Imbach 10/10 3031 days 2%
Eilahtan4 10/10 3069 days 1%
NZDiver 10/10 3130 days 1%
Nikki Turner 10/10 3173 days 1%
Christine Dadd 8/10 3240 days 1%
KatieR 10/10 3250 days 1%
Michael Maddams 9/10 3250 days 1%
Russ C 8/10 3252 days 1%
danam 10/10 3253 days 1%
Katy1 9/10 3254 days 1%
StefanieGermany 9/10 3269 days 1%
lannie 9/10 3285 days 1%
AbigailB 10/10 3297 days 1%
ReneeA 10/10 3300 days 1%
Ute 9/10 3304 days 1%
Annika 10/10 3316 days 1%
Salick 9/10 3316 days 1%
Thomas 8/10 3323 days 1%
Prentner 10/10 3332 days 1%
Evi 9/10 3357 days 1%
Limor 8/10 3358 days 1%
Christian 10/10 3467 days 1%
Lee Chapman 10/10 3568 days 0%
Jo and Tony 10/10 3644 days 1%
Lara Gema Conde 5/10 3744 days 0%
Trish 10/10 3981 days 0%
Fran 8/10 3982 days 0%
SueLinsk 10/10 3982 days 0%
Rosemary 9/10 3982 days 0%
Martin Christina 9/10 3988 days 0%
Meike 8/10 4015 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 Tutukaka experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-1.88% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Dive Tutukaka 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 Tutukaka experience has been adjusted for 94 days. Adjustments are according to the following table.

Days Adjustment
91 -1.82%
92 -1.84%
93 -1.86%
94 -1.88%
95 -1.90%
96 -1.92%
97 -1.94%

Final Ranking Score

89%

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.