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

87 Valid Reviews

The Dive Tutukaka experience has a total of 87 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 87 valid reviews:

Rating Count Percentage
10/10 39
45%
9/10 28
32%
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%

90.80% Average

The raw data average (mean) for all the Dive Tutukaka valid reviews is 90.80% and is based on 87 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 87 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

92.39%

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
Barbara McNab 10/10 229 days 91.69 100%
Cherie and Dan 10/10 569 days true 58.61 64%
Netta Tyler 10/10 621 days 40.6 44%
Theerada Wongkaew 10/10 663 days true 41.49 45%
Gazmira Molina 8/10 706 days true 34.77 37%
Jessica Nasstrom 8/10 713 days true 33.75 36%
Adeline 8/10 718 days true 33.03 35%
Rebecca Pierce 10/10 744 days 24.52 26%
Jane Simmons 10/10 866 days 13.31 14%
Julia Clark 9/10 934 days 9.11 9%
Kristina Breitwieser 10/10 939 days true 10.63 11%
Olivier Anciaux 7/10 952 days true 9.89 10%
Justine Hoffmann 9/10 984 days true 8.34 8%
Ruven Rintelmann 9/10 989 days true 8.14 8%
Niels Hoogendooen 8/10 1002 days true 7.64 8%
Marie Brauherr 10/10 1010 days true 7.37 7%
Luisa and Hannes 8/10 1014 days true 7.25 7%
Christian Boudreau 9/10 1032 days true 6.75 7%
Manuela Opprecht 7/10 1364 days 4.63 4%
Damaris Mayer 3/10 1364 days true 5.14 5%
Sophie Huybrechts 10/10 1406 days true 5.49 5%
Ally Cook 9/10 1410 days true 5.48 5%
Jessie Sabine 9/10 1709 days true 4.99 5%
Katrina Gamby 10/10 2067 days true 4.4 4%
Sonia Sennane 10/10 2421 days true 3.82 3%
Melanie Friessen 9/10 2422 days true 3.82 3%
Barry Baily 10/10 2433 days true 3.8 3%
Elisabeth 9/10 2442 days true 3.79 3%
Lotte Foged 8/10 2447 days true 3.78 3%
Anika 8/10 2448 days true 3.78 3%
Paul 8/10 2518 days true 3.66 3%
Elke & Charlotte 9/10 2531 days true 3.64 3%
Kris Gijbels 9/10 2764 days true 3.26 3%
Patrick Gloede 10/10 2769 days true 3.25 3%
Norm and Sky 9/10 2774 days true 3.24 3%
Roald and Ellen 9/10 2775 days true 3.24 3%
B Kleven 10/10 2780 days true 3.23 3%
Ann-Katrine & Sille 10/10 2784 days true 3.22 3%
Erland Ostberg 8/10 2788 days true 3.22 3%
Helene Descamps 9/10 2802 days true 3.19 3%
Heather Deobald 9/10 2804 days true 3.19 3%
Christina Fischer 6/10 2809 days true 3.18 3%
Shoe 10/10 2876 days 2.56 2%
RobThexton 10/10 3029 days 2.35 2%
Martin 9/10 3090 days true 2.72 2%
cpochin 10/10 3120 days 2.23 2%
John Casey 10/10 3132 days true 2.65 2%
Peter Schmidt 10/10 3151 days 2.18 2%
Elisabeth Egerup 10/10 3158 days true 2.61 2%
Vera Van Schie 10/10 3159 days true 2.61 2%
Chris Glasg 10/10 3159 days true 2.61 2%
Klass 9/10 3165 days true 2.6 2%
Belinda Godhard 9/10 3176 days true 2.58 2%
Theta 9/10 3179 days 2.15 1%
jamesg 9/10 3239 days true 2.48 2%
Mille Winther 10/10 3252 days true 2.45 2%
Christine Van Den Berg Michele Imbach 10/10 3264 days true 2.43 2%
Eilahtan4 10/10 3302 days 1.98 1%
NZDiver 10/10 3363 days 1.89 1%
Nikki Turner 10/10 3406 days true 2.2 2%
Christine Dadd 8/10 3473 days true 2.09 1%
KatieR 10/10 3483 days true 2.07 1%
Michael Maddams 9/10 3483 days true 2.07 1%
Russ C 8/10 3485 days 1.73 1%
danam 10/10 3486 days true 2.07 1%
Katy1 9/10 3487 days true 2.07 1%
StefanieGermany 9/10 3502 days true 2.04 1%
lannie 9/10 3518 days true 2.02 1%
AbigailB 10/10 3530 days true 2.0 1%
ReneeA 10/10 3533 days true 1.99 1%
Ute 9/10 3537 days true 1.99 1%
Annika 10/10 3549 days true 1.97 1%
Salick 9/10 3549 days true 1.97 1%
Thomas 8/10 3556 days true 1.95 1%
Prentner 10/10 3565 days true 1.94 1%
Evi 9/10 3590 days true 1.9 1%
Limor 8/10 3591 days true 1.9 1%
Christian 10/10 3701 days true 1.72 1%
Lee Chapman 10/10 3801 days 1.29 1%
Jo and Tony 10/10 3877 days true 1.43 1%
Lara Gema Conde 5/10 3977 days true 1.26 0%
Trish 10/10 4214 days true 0.87 0%
Fran 8/10 4215 days true 0.87 0%
SueLinsk 10/10 4215 days true 0.87 0%
Rosemary 9/10 4215 days true 0.87 0%
Martin Christina 9/10 4221 days true 0.86 0%
Meike 8/10 4248 days true 0.82 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

-4.18% 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 209 days. Adjustments are according to the following table.

Days Adjustment
206 -4.12%
207 -4.14%
208 -4.16%
209 -4.18%
210 -4.20%
211 -4.22%
212 -4.24%

Final Ranking Score

88%

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.