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

92.17%

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 10/10 598 days 44.14 100%
Cherie and Dan 10/10 938 days true 8.91 20%
Netta Tyler 10/10 991 days 6.71 15%
Theerada Wongkaew 10/10 1032 days true 5.63 13%
Gazmira Molina 8/10 1075 days true 4.81 11%
Jessica Nasstrom 8/10 1082 days true 4.78 11%
Adeline 8/10 1087 days true 4.76 11%
Rebecca Pierce 10/10 1114 days 4.97 11%
Jane Simmons 10/10 1236 days 4.76 11%
Julia Clark 9/10 1303 days 4.64 11%
Kristina Breitwieser 10/10 1308 days true 4.64 11%
Olivier Anciaux 7/10 1321 days true 4.2 10%
Justine Hoffmann 9/10 1353 days true 4.56 10%
Ruven Rintelmann 9/10 1358 days true 4.55 10%
Niels Hoogendooen 8/10 1371 days true 4.3 10%
Marie Brauherr 10/10 1379 days true 4.51 10%
Luisa and Hannes 8/10 1383 days true 4.28 10%
Christian Boudreau 9/10 1401 days true 4.48 10%
Manuela Opprecht 7/10 1733 days 3.56 8%
Damaris Mayer 3/10 1733 days true 3.01 7%
Sophie Huybrechts 10/10 1775 days true 3.84 9%
Ally Cook 9/10 1779 days true 3.83 9%
Jessie Sabine 9/10 2078 days true 3.32 8%
Katrina Gamby 10/10 2436 days true 2.7 6%
Sonia Sennane 10/10 2790 days true 2.1 5%
Melanie Friessen 9/10 2791 days true 2.1 5%
Barry Baily 10/10 2802 days true 2.08 5%
Elisabeth 9/10 2811 days true 2.06 5%
Lotte Foged 8/10 2816 days true 1.95 4%
Anika 8/10 2817 days true 1.95 4%
Paul 8/10 2887 days true 1.83 4%
Elke & Charlotte 9/10 2900 days true 1.91 4%
Kris Gijbels 9/10 3133 days true 1.51 3%
Patrick Gloede 10/10 3138 days true 1.5 3%
Norm and Sky 9/10 3143 days true 1.49 3%
Roald and Ellen 9/10 3144 days true 1.49 3%
B Kleven 10/10 3149 days true 1.48 3%
Ann-Katrine & Sille 10/10 3153 days true 1.48 3%
Erland Ostberg 8/10 3157 days true 1.4 3%
Helene Descamps 9/10 3171 days true 1.45 3%
Heather Deobald 9/10 3173 days true 1.44 3%
Christina Fischer 6/10 3178 days true 1.19 3%
Shoe 10/10 3245 days 1.32 3%
RobThexton 10/10 3398 days 1.06 2%
Martin 9/10 3459 days true 0.95 2%
cpochin 10/10 3489 days 0.9 2%
John Casey 10/10 3501 days true 0.88 2%
Peter Schmidt 10/10 3520 days 0.85 2%
Elisabeth Egerup 10/10 3527 days true 0.84 2%
Vera Van Schie 10/10 3528 days true 0.83 2%
Chris Glasg 10/10 3528 days true 0.83 2%
Klass 9/10 3534 days true 0.82 2%
Belinda Godhard 9/10 3545 days true 0.8 2%
Theta 9/10 3548 days 0.8 2%
jamesg 9/10 3608 days true 0.7 2%
Mille Winther 10/10 3621 days true 0.67 2%
Christine Van Den Berg Michele Imbach 10/10 3633 days true 0.65 1%
Eilahtan4 10/10 3671 days 0.59 1%
NZDiver 10/10 3732 days 0.48 1%
Nikki Turner 10/10 3775 days true 0.41 1%
Christine Dadd 8/10 3842 days true 0.28 1%
KatieR 10/10 3852 days true 0.28 1%
Michael Maddams 9/10 3852 days true 0.28 1%
Russ C 8/10 3854 days 0.26 1%
danam 10/10 3855 days true 0.27 1%
Katy1 9/10 3856 days true 0.27 1%
StefanieGermany 9/10 3871 days true 0.25 1%
lannie 9/10 3887 days true 0.22 0%
AbigailB 10/10 3899 days true 0.2 0%
ReneeA 10/10 3902 days true 0.19 0%
Ute 9/10 3906 days true 0.19 0%
Annika 10/10 3918 days true 0.17 0%
Salick 9/10 3918 days true 0.17 0%
Thomas 8/10 3925 days true 0.15 0%
Prentner 10/10 3934 days true 0.14 0%
Evi 9/10 3959 days true 0.1 0%
Limor 8/10 3960 days true 0.09 0%
Christian 10/10 4070 days true 0.0 0%
Lee Chapman 10/10 4170 days 0.0 0%
Jo and Tony 10/10 4246 days true 0.0 0%
Lara Gema Conde 5/10 4346 days true 0.0 0%
Trish 10/10 4583 days true 0.0 0%
Fran 8/10 4584 days true 0.0 0%
SueLinsk 10/10 4584 days true 0.0 0%
Rosemary 9/10 4584 days true 0.0 0%
Martin Christina 9/10 4590 days true 0.0 0%
Meike 8/10 4617 days true 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 Tutukaka experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-3.98% 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 199 days.

The Dive Tutukaka experience has been adjusted for 199 days. Adjustments are according to the following table.

Days Adjustment
196 -3.92%
197 -3.94%
198 -3.96%
199 -3.98%
200 -4.00%
201 -4.02%
202 -4.04%

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.