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 Naked Bus.
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.
Naked Bus
Valid Reviews
95 Valid Reviews
The Naked Bus experience has a total of 101 reviews. There are 95 valid reviews that are included when calculating the ranking score and 6 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 95 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 7 |
|
7% |
| 9/10 | 18 |
|
19% |
| 8/10 | 20 |
|
21% |
| 7/10 | 13 |
|
14% |
| 6/10 | 6 |
|
6% |
| 5/10 | 3 |
|
3% |
| 4/10 | 1 |
|
1% |
| 3/10 | 3 |
|
3% |
| 2/10 | 0 |
|
0% |
| 1/10 | 24 |
|
25% |
60.11% Average
The raw data average (mean) for all the Naked Bus valid reviews is 60.11% and is based on 95 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
58 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 95 valid reviews, the experience has 58 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 58 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 6 |
|
10% |
| 9/10 | 16 |
|
28% |
| 8/10 | 17 |
|
29% |
| 7/10 | 11 |
|
19% |
| 6/10 | 5 |
|
9% |
| 5/10 | 2 |
|
3% |
| 4/10 | 1 |
|
2% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
79.48% Average
The raw data average (mean) for all the Naked Bus face-to-face reviews is 79.48% and is based on 58 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
69.95%
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 |
|---|---|---|---|
| Angela Hills Boughey | 10/10 | 2226 days | 100% |
| craig hardy | 1/10 | 2955 days | 27% |
| Viv stefadouros | 9/10 | 3109 days | 58% |
| Suzanne | 1/10 | 3139 days | 23% |
| kiruthika vijayakumar | 1/10 | 3139 days | 23% |
| Ellie Pask | 1/10 | 3200 days | 22% |
| Justine Langero | 10/10 | 3323 days | 49% |
| SR SR | 1/10 | 3443 days | 17% |
| Tom Anders | 9/10 | 3532 days | 39% |
| Estelle Coquard | 7/10 | 3537 days | 36% |
| Kathrin Redl | 6/10 | 3552 days | 33% |
| Emily Noyd | 8/10 | 3554 days | 37% |
| Maxim Motheus | 8/10 | 3590 days | 36% |
| Emil Black Christian | 9/10 | 3590 days | 36% |
| Charn Tiebtienrat | 1/10 | 3625 days | 14% |
| peter salfrais | 1/10 | 3625 days | 14% |
| Pierre Villaume-Odile | 7/10 | 3648 days | 31% |
| unhappycustomer | 3/10 | 3717 days | 16% |
| Brendan Carton | 1/10 | 3718 days | 12% |
| Funk | 7/10 | 3839 days | 23% |
| Calvin Shi | 1/10 | 3931 days | 8% |
| pat rao | 1/10 | 3959 days | 8% |
| Justin Little | 1/10 | 3990 days | 7% |
| Focalvisions | 7/10 | 3990 days | 16% |
| Mischelle Mills | 1/10 | 4205 days | 3% |
| ilove totravel | 5/10 | 4266 days | 4% |
| Anna Sternberg | 8/10 | 4298 days | 3% |
| Jan Kerkhoff | 9/10 | 4301 days | 3% |
| Daniel Garcia Dezgado | 8/10 | 4306 days | 3% |
| Maria = Moller Hansen | 9/10 | 4308 days | 3% |
| Gassat | 9/10 | 4319 days | 2% |
| Felix | 4/10 | 4345 days | 1% |
| Corban Hill | 1/10 | 4356 days | 0% |
| Cyndyl Richards | 1/10 | 4448 days | 9% |
| John Stroup | 1/10 | 4448 days | 9% |
| paulweig | 8/10 | 4631 days | 23% |
| Epi Gates | 6/10 | 4631 days | 20% |
| Andé Moreira | 1/10 | 4662 days | 9% |
| Stella Thoben | 7/10 | 4664 days | 22% |
| Anna Niesl | 7/10 | 4668 days | 22% |
| Kristina Wells | 1/10 | 4721 days | 9% |
| alastair maceachern | 1/10 | 4721 days | 9% |
| hirini2371 | 1/10 | 4782 days | 9% |
| Lisa Ruhfus | 10/10 | 5036 days | 23% |
| Danpaley | 1/10 | 5087 days | 9% |
| Ashley Mckenney | 8/10 | 5101 days | 23% |
| Isabella Abele | 7/10 | 5118 days | 22% |
| smileyducky | 1/10 | 5209 days | 9% |
| Lennart Lundberg | 7/10 | 5364 days | 22% |
| Claudia Jackson and Geoffroy van Roelenbosch | 7/10 | 5376 days | 22% |
| Chrissy Crebas | 6/10 | 5378 days | 20% |
| Beth and Daisy | 8/10 | 5381 days | 23% |
| Tim Wright | 8/10 | 5419 days | 23% |
| Emma Wilkinson | 8/10 | 5420 days | 23% |
| Katny | 8/10 | 5421 days | 23% |
| SandyS | 8/10 | 5452 days | 23% |
| Katy | 8/10 | 5691 days | 23% |
| Christine T | 8/10 | 5752 days | 23% |
| Marcio Moretti | 9/10 | 5768 days | 23% |
| ohSNAP | 3/10 | 5786 days | 13% |
| Hokang Kim | 3/10 | 5848 days | 13% |
| Lindsay Brown | 5/10 | 5858 days | 18% |
| confederatesoldier | 1/10 | 5878 days | 9% |
| Annabel | 1/10 | 5909 days | 9% |
| miniappleses | 8/10 | 5909 days | 23% |
| Ozhan | 8/10 | 6132 days | 23% |
| Deahne | 8/10 | 6142 days | 23% |
| Yuko | 9/10 | 6142 days | 23% |
| Craig | 10/10 | 6149 days | 23% |
| Constance | 7/10 | 6158 days | 22% |
| Kristen | 8/10 | 6165 days | 23% |
| frank | 5/10 | 6166 days | 18% |
| Grace | 9/10 | 6197 days | 23% |
| Claudia Schmidt | 9/10 | 6208 days | 23% |
| Helga | 6/10 | 6266 days | 20% |
| Sophie | 10/10 | 6290 days | 23% |
| Carmen | 10/10 | 6344 days | 23% |
| Wolfgang | 7/10 | 6364 days | 22% |
| Anke | 8/10 | 6442 days | 23% |
| Hernando | 9/10 | 6468 days | 23% |
| Klaus | 7/10 | 6472 days | 22% |
| Corinne | 8/10 | 6476 days | 23% |
| Yumi | 7/10 | 6485 days | 22% |
| Lena | 8/10 | 6485 days | 23% |
| Vicky Elliott | 9/10 | 6503 days | 23% |
| Sophia | 10/10 | 6505 days | 23% |
| Reina Lohaye | 9/10 | 6507 days | 23% |
| Iain | 9/10 | 6539 days | 23% |
| Gav | 6/10 | 6539 days | 20% |
| Anneli | 6/10 | 6540 days | 20% |
| Davinia | 9/10 | 6567 days | 23% |
| Rob Boston | 1/10 | 6640 days | 9% |
| Will | 9/10 | 6808 days | 23% |
| clairekidd | 9/10 | 6821 days | 23% |
| Silke | 9/10 | 6829 days | 23% |
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 Naked Bus experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the Naked Bus 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 Naked Bus experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
9.60% 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
75%
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.