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

91.90%

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 88 days 98.77 100%
Cherie and Dan 10/10 428 days true 85.17 86%
Netta Tyler 10/10 481 days 63.34 64%
Theerada Wongkaew 10/10 522 days true 68.19 69%
Gazmira Molina 8/10 565 days true 59.41 60%
Jessica Nasstrom 8/10 572 days true 58.01 58%
Adeline 8/10 577 days true 57.02 57%
Rebecca Pierce 10/10 604 days 43.2 43%
Jane Simmons 10/10 726 days 26.58 26%
Julia Clark 9/10 793 days 19.45 19%
Kristina Breitwieser 10/10 798 days true 22.77 22%
Olivier Anciaux 7/10 811 days true 21.34 21%
Justine Hoffmann 9/10 843 days true 18.08 17%
Ruven Rintelmann 9/10 848 days true 17.6 17%
Niels Hoogendooen 8/10 861 days true 16.41 16%
Marie Brauherr 10/10 869 days true 15.71 15%
Luisa and Hannes 8/10 873 days true 15.37 15%
Christian Boudreau 9/10 891 days true 13.91 13%
Manuela Opprecht 7/10 1223 days 4.82 4%
Damaris Mayer 3/10 1223 days true 5.36 4%
Sophie Huybrechts 10/10 1265 days true 5.72 5%
Ally Cook 9/10 1269 days true 5.71 5%
Jessie Sabine 9/10 1568 days true 5.22 4%
Katrina Gamby 10/10 1926 days true 4.63 4%
Sonia Sennane 10/10 2280 days true 4.05 3%
Melanie Friessen 9/10 2281 days true 4.05 3%
Barry Baily 10/10 2292 days true 4.03 3%
Elisabeth 9/10 2301 days true 4.02 3%
Lotte Foged 8/10 2306 days true 4.01 3%
Anika 8/10 2307 days true 4.01 3%
Paul 8/10 2377 days true 3.89 3%
Elke & Charlotte 9/10 2390 days true 3.87 3%
Kris Gijbels 9/10 2623 days true 3.49 2%
Patrick Gloede 10/10 2628 days true 3.48 2%
Norm and Sky 9/10 2633 days true 3.47 2%
Roald and Ellen 9/10 2634 days true 3.47 2%
B Kleven 10/10 2639 days true 3.46 2%
Ann-Katrine & Sille 10/10 2643 days true 3.46 2%
Erland Ostberg 8/10 2647 days true 3.45 2%
Helene Descamps 9/10 2661 days true 3.43 2%
Heather Deobald 9/10 2663 days true 3.42 2%
Christina Fischer 6/10 2668 days true 3.41 2%
Shoe 10/10 2735 days 2.75 2%
RobThexton 10/10 2888 days 2.54 2%
Martin 9/10 2949 days true 2.95 2%
cpochin 10/10 2979 days 2.42 1%
John Casey 10/10 2991 days true 2.88 2%
Peter Schmidt 10/10 3010 days 2.38 1%
Elisabeth Egerup 10/10 3017 days true 2.84 2%
Vera Van Schie 10/10 3018 days true 2.84 2%
Chris Glasg 10/10 3018 days true 2.84 2%
Klass 9/10 3024 days true 2.83 2%
Belinda Godhard 9/10 3035 days true 2.81 2%
Theta 9/10 3038 days 2.34 1%
jamesg 9/10 3098 days true 2.71 2%
Mille Winther 10/10 3111 days true 2.69 2%
Christine Van Den Berg Michele Imbach 10/10 3123 days true 2.67 2%
Eilahtan4 10/10 3161 days 2.17 1%
NZDiver 10/10 3222 days 2.09 1%
Nikki Turner 10/10 3265 days true 2.43 1%
Christine Dadd 8/10 3332 days true 2.32 1%
KatieR 10/10 3342 days true 2.31 1%
Michael Maddams 9/10 3342 days true 2.31 1%
Russ C 8/10 3344 days 1.92 1%
danam 10/10 3345 days true 2.3 1%
Katy1 9/10 3346 days true 2.3 1%
StefanieGermany 9/10 3361 days true 2.28 1%
lannie 9/10 3377 days true 2.25 1%
AbigailB 10/10 3389 days true 2.23 1%
ReneeA 10/10 3392 days true 2.22 1%
Ute 9/10 3396 days true 2.22 1%
Annika 10/10 3408 days true 2.2 1%
Salick 9/10 3408 days true 2.2 1%
Thomas 8/10 3415 days true 2.19 1%
Prentner 10/10 3424 days true 2.17 1%
Evi 9/10 3449 days true 2.13 1%
Limor 8/10 3450 days true 2.13 1%
Christian 10/10 3560 days true 1.95 1%
Lee Chapman 10/10 3660 days 1.49 0%
Jo and Tony 10/10 3736 days true 1.66 1%
Lara Gema Conde 5/10 3836 days true 1.49 0%
Trish 10/10 4073 days true 1.1 0%
Fran 8/10 4074 days true 1.1 0%
SueLinsk 10/10 4074 days true 1.1 0%
Rosemary 9/10 4074 days true 1.1 0%
Martin Christina 9/10 4080 days true 1.09 0%
Meike 8/10 4107 days true 1.05 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

-1.38% 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 69 days. Adjustments are according to the following table.

Days Adjustment
66 -1.32%
67 -1.34%
68 -1.36%
69 -1.38%
70 -1.40%
71 -1.42%
72 -1.44%

Final Ranking Score

91%

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.