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

92.22%

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 10/10 168 days 95.53 100%
Cherie and Dan 10/10 508 days true 70.93 74%
Netta Tyler 10/10 560 days 50.36 52%
Theerada Wongkaew 10/10 602 days true 52.22 54%
Gazmira Molina 8/10 645 days true 44.51 46%
Jessica Nasstrom 8/10 652 days true 43.32 45%
Adeline 8/10 657 days true 42.48 44%
Rebecca Pierce 10/10 683 days 31.9 33%
Jane Simmons 10/10 805 days 18.33 18%
Julia Clark 9/10 873 days 12.81 13%
Kristina Breitwieser 10/10 878 days true 14.95 15%
Olivier Anciaux 7/10 891 days true 13.91 14%
Justine Hoffmann 9/10 923 days true 11.63 11%
Ruven Rintelmann 9/10 928 days true 11.3 11%
Niels Hoogendooen 8/10 941 days true 10.51 10%
Marie Brauherr 10/10 949 days true 10.05 10%
Luisa and Hannes 8/10 953 days true 9.83 9%
Christian Boudreau 9/10 971 days true 8.92 8%
Manuela Opprecht 7/10 1303 days 4.72 4%
Damaris Mayer 3/10 1303 days true 5.23 5%
Sophie Huybrechts 10/10 1345 days true 5.59 5%
Ally Cook 9/10 1349 days true 5.58 5%
Jessie Sabine 9/10 1648 days true 5.09 4%
Katrina Gamby 10/10 2006 days true 4.5 4%
Sonia Sennane 10/10 2360 days true 3.92 3%
Melanie Friessen 9/10 2361 days true 3.92 3%
Barry Baily 10/10 2372 days true 3.9 3%
Elisabeth 9/10 2381 days true 3.89 3%
Lotte Foged 8/10 2386 days true 3.88 3%
Anika 8/10 2387 days true 3.88 3%
Paul 8/10 2457 days true 3.76 3%
Elke & Charlotte 9/10 2470 days true 3.74 3%
Kris Gijbels 9/10 2703 days true 3.36 3%
Patrick Gloede 10/10 2708 days true 3.35 3%
Norm and Sky 9/10 2713 days true 3.34 3%
Roald and Ellen 9/10 2714 days true 3.34 3%
B Kleven 10/10 2719 days true 3.33 3%
Ann-Katrine & Sille 10/10 2723 days true 3.32 3%
Erland Ostberg 8/10 2727 days true 3.32 3%
Helene Descamps 9/10 2741 days true 3.29 3%
Heather Deobald 9/10 2743 days true 3.29 3%
Christina Fischer 6/10 2748 days true 3.28 3%
Shoe 10/10 2815 days 2.64 2%
RobThexton 10/10 2968 days 2.43 2%
Martin 9/10 3029 days true 2.82 2%
cpochin 10/10 3059 days 2.31 1%
John Casey 10/10 3071 days true 2.75 2%
Peter Schmidt 10/10 3090 days 2.27 1%
Elisabeth Egerup 10/10 3097 days true 2.71 2%
Vera Van Schie 10/10 3098 days true 2.71 2%
Chris Glasg 10/10 3098 days true 2.71 2%
Klass 9/10 3104 days true 2.7 2%
Belinda Godhard 9/10 3115 days true 2.68 2%
Theta 9/10 3118 days 2.23 1%
jamesg 9/10 3178 days true 2.58 2%
Mille Winther 10/10 3191 days true 2.55 2%
Christine Van Den Berg Michele Imbach 10/10 3203 days true 2.53 2%
Eilahtan4 10/10 3241 days 2.06 1%
NZDiver 10/10 3302 days 1.98 1%
Nikki Turner 10/10 3345 days true 2.3 1%
Christine Dadd 8/10 3412 days true 2.19 1%
KatieR 10/10 3422 days true 2.17 1%
Michael Maddams 9/10 3422 days true 2.17 1%
Russ C 8/10 3424 days 1.81 1%
danam 10/10 3425 days true 2.17 1%
Katy1 9/10 3426 days true 2.17 1%
StefanieGermany 9/10 3441 days true 2.14 1%
lannie 9/10 3457 days true 2.12 1%
AbigailB 10/10 3469 days true 2.1 1%
ReneeA 10/10 3472 days true 2.09 1%
Ute 9/10 3476 days true 2.09 1%
Annika 10/10 3488 days true 2.07 1%
Salick 9/10 3488 days true 2.07 1%
Thomas 8/10 3495 days true 2.05 1%
Prentner 10/10 3504 days true 2.04 1%
Evi 9/10 3529 days true 2.0 1%
Limor 8/10 3530 days true 2.0 1%
Christian 10/10 3639 days true 1.82 1%
Lee Chapman 10/10 3740 days 1.38 0%
Jo and Tony 10/10 3816 days true 1.53 1%
Lara Gema Conde 5/10 3916 days true 1.36 0%
Trish 10/10 4153 days true 0.97 0%
Fran 8/10 4154 days true 0.97 0%
SueLinsk 10/10 4154 days true 0.97 0%
Rosemary 9/10 4154 days true 0.97 0%
Martin Christina 9/10 4160 days true 0.96 0%
Meike 8/10 4187 days true 0.92 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

-2.96% 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 148 days. Adjustments are according to the following table.

Days Adjustment
145 -2.90%
146 -2.92%
147 -2.94%
148 -2.96%
149 -2.98%
150 -3.00%
151 -3.02%

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.