Hi, 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 Bluebridge Cook Strait Ferries.
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.
Bluebridge Cook Strait Ferries
Valid Reviews
227 Valid Reviews
The Bluebridge Cook Strait Ferries experience has a total of 232 reviews. There are 227 valid reviews that are included when calculating the ranking score and 5 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 227 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
16% |
| 9/10 | 28 |
|
12% |
| 8/10 | 64 |
|
28% |
| 7/10 | 54 |
|
24% |
| 6/10 | 17 |
|
7% |
| 5/10 | 7 |
|
3% |
| 4/10 | 5 |
|
2% |
| 3/10 | 5 |
|
2% |
| 2/10 | 3 |
|
1% |
| 1/10 | 8 |
|
4% |
74.36% Average
The raw data average (mean) for all the Bluebridge Cook Strait Ferries valid reviews is 74.36% and is based on 227 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
191 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 227 valid reviews, the experience has 191 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 191 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 26 |
|
14% |
| 9/10 | 27 |
|
14% |
| 8/10 | 59 |
|
31% |
| 7/10 | 49 |
|
26% |
| 6/10 | 17 |
|
9% |
| 5/10 | 5 |
|
3% |
| 4/10 | 3 |
|
2% |
| 3/10 | 2 |
|
1% |
| 2/10 | 3 |
|
2% |
| 1/10 | 0 |
|
0% |
76.91% Average
The raw data average (mean) for all the Bluebridge Cook Strait Ferries face-to-face reviews is 76.91% and is based on 191 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.21%
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 | Relative Weight |
|---|---|---|---|
| Bonnie Henderson - Waho | 10/10 | 197 days | 100% |
| Glenys Everitt | 10/10 | 289 days | 97% |
| Warren | 5/10 | 409 days | 71% |
| Matt | 10/10 | 1140 days | 32% |
| SBlu | 1/10 | 1171 days | 12% |
| James Fuller | 3/10 | 1202 days | 15% |
| Mark | 4/10 | 1232 days | 17% |
| Véronique Laplante | 1/10 | 1232 days | 10% |
| Brian symmes | 1/10 | 1232 days | 10% |
| R. Armstrong | 5/10 | 1263 days | 18% |
| Sandy | 1/10 | 1446 days | 5% |
| Jonathan | 1/10 | 1597 days | 3% |
| PeteR | 3/10 | 1628 days | 4% |
| La Vie | 1/10 | 1811 days | 2% |
| Pauline Kane | 10/10 | 2389 days | 4% |
| Roy Sandbrook | 10/10 | 2542 days | 4% |
| Nickclev | 3/10 | 2573 days | 2% |
| Pepe Huebner | 4/10 | 2996 days | 2% |
| Jennie Tollerton | 8/10 | 3059 days | 3% |
| Phil Baker | 9/10 | 3062 days | 3% |
| Lily Roelofs | 1/10 | 3088 days | 1% |
| Vince Midmore | 1/10 | 3330 days | 1% |
| Francesca Scott | 10/10 | 3339 days | 2% |
| Erna Muller | 9/10 | 3347 days | 2% |
| Flip Hoogeveen | 8/10 | 3347 days | 2% |
| Chaulet | 5/10 | 3350 days | 2% |
| Felix Koehler | 4/10 | 3351 days | 1% |
| Kristina Nunoz | 7/10 | 3351 days | 2% |
| Becky Fox | 7/10 | 3353 days | 2% |
| Emma Millett | 8/10 | 3353 days | 2% |
| Rohzine | 7/10 | 3353 days | 2% |
| P and W Gene | 8/10 | 3354 days | 2% |
| Maaike | 8/10 | 3382 days | 2% |
| T Geelen | 8/10 | 3382 days | 2% |
| Wendy Steer | 8/10 | 3388 days | 2% |
| Marcel Felder | 7/10 | 3392 days | 2% |
| Jonas Gorb | 8/10 | 3396 days | 2% |
| Rahel | 7/10 | 3396 days | 2% |
| Maria Eriksson | 7/10 | 3399 days | 2% |
| Gilbert Baptiste | 8/10 | 3399 days | 2% |
| Emilie Bavard | 7/10 | 3399 days | 2% |
| Josh Bird | 7/10 | 3401 days | 2% |
| Jemima Brown | 7/10 | 3401 days | 2% |
| Aurelie Otis | 9/10 | 3403 days | 2% |
| Jake Bullin | 10/10 | 3405 days | 2% |
| Lisa | 10/10 | 3406 days | 2% |
| Bina Johansson | 10/10 | 3416 days | 2% |
| Sabrina and Hannes | 8/10 | 3419 days | 2% |
| Rogier Post | 7/10 | 3421 days | 2% |
| Michal Za'heryuk | 8/10 | 3423 days | 2% |
| Karine Dransart | 8/10 | 3427 days | 2% |
| Samuel Michalak | 7/10 | 3430 days | 2% |
| Ben | 7/10 | 3433 days | 2% |
| Julian Gury | 7/10 | 3436 days | 2% |
| Fazeel Ali | 10/10 | 3483 days | 2% |
| Anna | 10/10 | 3637 days | 1% |
| Jan Berendsen | 9/10 | 3641 days | 1% |
| Jorge Anderson | 8/10 | 3641 days | 1% |
| Simon Schatz | 8/10 | 3643 days | 1% |
| Thomas Le Buzulier | 8/10 | 3647 days | 1% |
| Kristina Breitwieser | 8/10 | 3648 days | 1% |
| Magali Schwantke | 8/10 | 3651 days | 1% |
| Laura Schratt | 6/10 | 3654 days | 1% |
| Mathilde Arp | 8/10 | 3654 days | 1% |
| Arnd Kohlen | 6/10 | 3654 days | 1% |
| Laerke Soee | 7/10 | 3655 days | 1% |
| Christian Krause | 9/10 | 3655 days | 1% |
| Mark | 8/10 | 3662 days | 1% |
| Hannes | 10/10 | 3666 days | 1% |
| Nathan Raymond | 10/10 | 3668 days | 1% |
| Rachel Bruce | 5/10 | 3669 days | 1% |
| Sunja Abbe | 9/10 | 3671 days | 1% |
| Kristof | 7/10 | 3673 days | 1% |
| Talissa Missiato | 10/10 | 3674 days | 1% |
| Eloise | 7/10 | 3674 days | 1% |
| Julia Scharbert | 8/10 | 3675 days | 1% |
| Severin Knegsch | 9/10 | 3675 days | 1% |
| Pierre Jouffineau | 9/10 | 3676 days | 1% |
| Floren Hoenschler | 7/10 | 3682 days | 1% |
| Johanna | 7/10 | 3682 days | 1% |
| Natasha Harbinson | 6/10 | 3686 days | 1% |
| Sophie Kalnymsky | 7/10 | 3689 days | 1% |
| Clemence and Pedro | 8/10 | 3690 days | 1% |
| Maxim Motheus | 8/10 | 3692 days | 1% |
| Mijke Boesten | 6/10 | 3693 days | 1% |
| Jan | 6/10 | 3696 days | 1% |
| Cindy Rizzo | 8/10 | 3699 days | 1% |
| Ulli | 10/10 | 3702 days | 1% |
| Dave O'Brien | 10/10 | 3705 days | 1% |
| Annett Kiessling | 7/10 | 3705 days | 1% |
| Chiara | 7/10 | 3707 days | 1% |
| Levi | 8/10 | 3709 days | 1% |
| Martin Baleja | 10/10 | 3710 days | 1% |
| Asborn Damgaard | 9/10 | 3714 days | 1% |
| Leo James | 8/10 | 3714 days | 1% |
| Sophie NIemann | 10/10 | 3715 days | 1% |
| Edwine | 8/10 | 3715 days | 1% |
| Jonathan and Gulsen | 10/10 | 3724 days | 1% |
| Tatiana | 10/10 | 3724 days | 1% |
| Valerie Balcom | 8/10 | 3724 days | 1% |
| Raviv Regev | 8/10 | 3739 days | 1% |
| Monika Dippel | 8/10 | 3742 days | 1% |
| Marc | 6/10 | 3742 days | 1% |
| Christine Slowiak | 8/10 | 3743 days | 1% |
| Justin Kechanski | 6/10 | 3743 days | 1% |
| Judith Goodyear | 7/10 | 3752 days | 1% |
| Hannah Fidora | 8/10 | 3755 days | 1% |
| Sarah Boettcher | 9/10 | 3803 days | 1% |
| Katherine Halliday | 9/10 | 4023 days | 1% |
| Christoph | 8/10 | 4024 days | 1% |
| Katherine Britten | 9/10 | 4026 days | 1% |
| Trevor Wichman | 9/10 | 4067 days | 1% |
| Jan Towers | 10/10 | 4366 days | 0% |
| isabel Zander | 7/10 | 4367 days | 0% |
| Corinne | 8/10 | 4369 days | 0% |
| Martin Sajdok | 5/10 | 4370 days | 0% |
| Camille Bellay | 7/10 | 4370 days | 0% |
| Garry Renton | 7/10 | 4375 days | 0% |
| Paula Renton | 7/10 | 4375 days | 0% |
| Simon Mehlmann | 7/10 | 4376 days | 0% |
| Carolin Siegert | 8/10 | 4376 days | 0% |
| Sarah Beyeler | 10/10 | 4398 days | 1% |
| Kim Lavener | 10/10 | 4398 days | 1% |
| Rosie | 7/10 | 4399 days | 1% |
| Anna Sternberg | 6/10 | 4400 days | 1% |
| Steffen | 9/10 | 4402 days | 1% |
| Nina Helmling | 8/10 | 4402 days | 1% |
| Friederike Kranzin | 7/10 | 4406 days | 1% |
| Guillaume | 6/10 | 4408 days | 1% |
| Roy Matthieu | 7/10 | 4410 days | 1% |
| Cindy Benayoum | 7/10 | 4410 days | 1% |
| Simon Tanguy | 8/10 | 4418 days | 1% |
| David Krasner | 9/10 | 4424 days | 1% |
| Susan | 8/10 | 4424 days | 1% |
| Jesseca Klausch | 6/10 | 4425 days | 1% |
| Vincent Schaeflier | 6/10 | 4425 days | 1% |
| Timothee Serres | 7/10 | 4429 days | 1% |
| Jesse Flynn | 6/10 | 4434 days | 1% |
| Claudia | 10/10 | 4436 days | 1% |
| Stuart Wilson | 8/10 | 4454 days | 1% |
| Marine | 9/10 | 4455 days | 1% |
| Supiot Zudovic | 10/10 | 4746 days | 1% |
| Iban Dupont | 7/10 | 4747 days | 1% |
| Guillaume Boudrand | 8/10 | 4747 days | 1% |
| Rampon | 9/10 | 4751 days | 1% |
| Jirka Sirka | 8/10 | 4752 days | 1% |
| Debiesse | 9/10 | 4752 days | 1% |
| Jitka Zenahlikova | 5/10 | 4756 days | 1% |
| Gale Willcocks | 10/10 | 4757 days | 1% |
| Ken Richardson | 8/10 | 4757 days | 1% |
| Cloarec Guillaume | 9/10 | 4759 days | 1% |
| Kathy Arthurs | 8/10 | 4764 days | 1% |
| Claire | 7/10 | 4764 days | 1% |
| Brendon Furney | 9/10 | 4768 days | 1% |
| Sanchez | 2/10 | 4776 days | 0% |
| Mary Neustroski | 9/10 | 4778 days | 1% |
| Scholler | 10/10 | 4823 days | 1% |
| Nadine and Jan | 8/10 | 4836 days | 1% |
| Frederick Neilsen | 8/10 | 4866 days | 1% |
| Paulmiriamgarry | 10/10 | 5007 days | 1% |
| Numa Brouimet | 7/10 | 5125 days | 1% |
| Virgil Anabel | 9/10 | 5125 days | 1% |
| Melanie Friessen | 6/10 | 5131 days | 1% |
| D van Dongen | 7/10 | 5133 days | 1% |
| David Perry | 8/10 | 5138 days | 1% |
| pamr | 8/10 | 5142 days | 1% |
| M Neuman | 8/10 | 5150 days | 1% |
| A Sorg | 10/10 | 5150 days | 1% |
| ge04jen | 7/10 | 5189 days | 1% |
| hendrik king | 7/10 | 5189 days | 1% |
| jule | 8/10 | 5250 days | 1% |
| Ryan Dorsey | 8/10 | 5492 days | 1% |
| Kathleen Brown | 8/10 | 5493 days | 1% |
| Pete H | 2/10 | 5869 days | 0% |
| hermine Petz | 2/10 | 5882 days | 0% |
| Mike Kirchner | 6/10 | 5884 days | 1% |
| Ann Grandchamp | 10/10 | 5902 days | 1% |
| Holliger | 7/10 | 5905 days | 1% |
| Kane Chain | 6/10 | 5905 days | 1% |
| Glenn Nicholson | 8/10 | 5908 days | 1% |
| sanneb1 | 7/10 | 5935 days | 1% |
| jamesg | 8/10 | 5948 days | 1% |
| Bas van Schagen | 7/10 | 5957 days | 1% |
| Des Longville | 7/10 | 6103 days | 1% |
| VirginiaR | 9/10 | 6186 days | 1% |
| Raewyn | 7/10 | 6191 days | 1% |
| Sally477 | 9/10 | 6195 days | 1% |
| Limor | 9/10 | 6265 days | 1% |
| Hove | 8/10 | 6266 days | 1% |
| Lieke | 8/10 | 6266 days | 1% |
| martin piper | 8/10 | 6270 days | 1% |
| purplekat99 | 10/10 | 6315 days | 1% |
| Patricia | 10/10 | 6315 days | 1% |
| Tiana | 8/10 | 6333 days | 1% |
| Raey | 10/10 | 6391 days | 1% |
| Carmen | 3/10 | 6446 days | 1% |
| Dave | 7/10 | 6453 days | 1% |
| Sheila Haran | 7/10 | 6566 days | 1% |
| Caroline Cole | 4/10 | 6571 days | 1% |
| Wendy | 8/10 | 6578 days | 1% |
| Annette Hurst | 8/10 | 6584 days | 1% |
| Phil Connelly | 7/10 | 6586 days | 1% |
| Andria Davis | 9/10 | 6587 days | 1% |
| Georgina Mulligan | 7/10 | 6587 days | 1% |
| Claire Masling | 8/10 | 6594 days | 1% |
| Christian Schwerdt | 7/10 | 6595 days | 1% |
| Jackie Horwell | 10/10 | 6595 days | 1% |
| Gustavo | 7/10 | 6595 days | 1% |
| Sean Pierce | 5/10 | 6599 days | 1% |
| Roger and Heather Smith | 10/10 | 6599 days | 1% |
| Tobias Rahm | 10/10 | 6599 days | 1% |
| Roman | 6/10 | 6605 days | 1% |
| ranker_851 | 8/10 | 6605 days | 1% |
| Vaclaf | 8/10 | 6605 days | 1% |
| Sebastian Bleck | 7/10 | 6609 days | 1% |
| Emma Dolk | 4/10 | 6610 days | 1% |
| Sheryl | 8/10 | 6631 days | 1% |
| David | 8/10 | 6640 days | 1% |
| Iain | 6/10 | 6641 days | 1% |
| Fred and Tim | 7/10 | 6675 days | 1% |
| George | 9/10 | 6910 days | 1% |
| Matous | 7/10 | 6915 days | 1% |
| clairekidd | 7/10 | 6923 days | 1% |
| Jonas | 3/10 | 6929 days | 1% |
| Stefan | 7/10 | 6954 days | 1% |
| Stefan | 8/10 | 6964 days | 1% |
| Justin | 9/10 | 6964 days | 1% |
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 Bluebridge Cook Strait Ferries experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-3.39% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 57 days. However the Bluebridge Cook Strait Ferries 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Bluebridge Cook Strait Ferries experience has been adjusted for 171 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 168 | -3.33% |
| 169 | -3.35% |
| 170 | -3.37% |
| 171 | -3.39% |
| 172 | -3.41% |
| 173 | -3.43% |
| 174 | -3.45% |
| … | … |
Balancing Adjustment
6.04% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.