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