Kia ora, 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
69.55%
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 | 2262 days | 100% |
| craig hardy | 1/10 | 2991 days | 26% |
| Viv stefadouros | 9/10 | 3145 days | 57% |
| Suzanne | 1/10 | 3175 days | 22% |
| kiruthika vijayakumar | 1/10 | 3175 days | 22% |
| Ellie Pask | 1/10 | 3236 days | 21% |
| Justine Langero | 10/10 | 3359 days | 48% |
| SR SR | 1/10 | 3479 days | 16% |
| Tom Anders | 9/10 | 3568 days | 37% |
| Estelle Coquard | 7/10 | 3573 days | 35% |
| Kathrin Redl | 6/10 | 3588 days | 31% |
| Emily Noyd | 8/10 | 3590 days | 36% |
| Maxim Motheus | 8/10 | 3626 days | 34% |
| Emil Black Christian | 9/10 | 3626 days | 34% |
| Charn Tiebtienrat | 1/10 | 3661 days | 13% |
| peter salfrais | 1/10 | 3661 days | 13% |
| Pierre Villaume-Odile | 7/10 | 3684 days | 30% |
| unhappycustomer | 3/10 | 3753 days | 15% |
| Brendan Carton | 1/10 | 3754 days | 11% |
| Funk | 7/10 | 3875 days | 21% |
| Calvin Shi | 1/10 | 3967 days | 7% |
| pat rao | 1/10 | 3995 days | 6% |
| Justin Little | 1/10 | 4026 days | 6% |
| Focalvisions | 7/10 | 4026 days | 15% |
| Mischelle Mills | 1/10 | 4241 days | 2% |
| ilove totravel | 5/10 | 4302 days | 2% |
| Anna Sternberg | 8/10 | 4334 days | 1% |
| Jan Kerkhoff | 9/10 | 4337 days | 1% |
| Daniel Garcia Dezgado | 8/10 | 4342 days | 1% |
| Maria = Moller Hansen | 9/10 | 4344 days | 1% |
| Gassat | 9/10 | 4355 days | 0% |
| Felix | 4/10 | 4381 days | 15% |
| Corban Hill | 1/10 | 4392 days | 9% |
| Cyndyl Richards | 1/10 | 4484 days | 9% |
| John Stroup | 1/10 | 4484 days | 9% |
| paulweig | 8/10 | 4667 days | 23% |
| Epi Gates | 6/10 | 4667 days | 20% |
| Andé Moreira | 1/10 | 4698 days | 9% |
| Stella Thoben | 7/10 | 4700 days | 22% |
| Anna Niesl | 7/10 | 4704 days | 22% |
| Kristina Wells | 1/10 | 4757 days | 9% |
| alastair maceachern | 1/10 | 4757 days | 9% |
| hirini2371 | 1/10 | 4818 days | 9% |
| Lisa Ruhfus | 10/10 | 5072 days | 23% |
| Danpaley | 1/10 | 5123 days | 9% |
| Ashley Mckenney | 8/10 | 5137 days | 23% |
| Isabella Abele | 7/10 | 5154 days | 22% |
| smileyducky | 1/10 | 5245 days | 9% |
| Lennart Lundberg | 7/10 | 5400 days | 22% |
| Claudia Jackson and Geoffroy van Roelenbosch | 7/10 | 5412 days | 22% |
| Chrissy Crebas | 6/10 | 5414 days | 20% |
| Beth and Daisy | 8/10 | 5417 days | 23% |
| Tim Wright | 8/10 | 5455 days | 23% |
| Emma Wilkinson | 8/10 | 5456 days | 23% |
| Katny | 8/10 | 5457 days | 23% |
| SandyS | 8/10 | 5488 days | 23% |
| Katy | 8/10 | 5727 days | 23% |
| Christine T | 8/10 | 5788 days | 23% |
| Marcio Moretti | 9/10 | 5804 days | 23% |
| ohSNAP | 3/10 | 5822 days | 12% |
| Hokang Kim | 3/10 | 5884 days | 12% |
| Lindsay Brown | 5/10 | 5894 days | 17% |
| confederatesoldier | 1/10 | 5914 days | 9% |
| Annabel | 1/10 | 5945 days | 9% |
| miniappleses | 8/10 | 5945 days | 23% |
| Ozhan | 8/10 | 6168 days | 23% |
| Deahne | 8/10 | 6178 days | 23% |
| Yuko | 9/10 | 6178 days | 23% |
| Craig | 10/10 | 6185 days | 23% |
| Constance | 7/10 | 6194 days | 22% |
| Kristen | 8/10 | 6201 days | 23% |
| frank | 5/10 | 6202 days | 17% |
| Grace | 9/10 | 6232 days | 23% |
| Claudia Schmidt | 9/10 | 6244 days | 23% |
| Helga | 6/10 | 6302 days | 20% |
| Sophie | 10/10 | 6325 days | 23% |
| Carmen | 10/10 | 6380 days | 23% |
| Wolfgang | 7/10 | 6400 days | 22% |
| Anke | 8/10 | 6478 days | 23% |
| Hernando | 9/10 | 6504 days | 23% |
| Klaus | 7/10 | 6508 days | 22% |
| Corinne | 8/10 | 6512 days | 23% |
| Yumi | 7/10 | 6521 days | 22% |
| Lena | 8/10 | 6521 days | 23% |
| Vicky Elliott | 9/10 | 6539 days | 23% |
| Sophia | 10/10 | 6541 days | 23% |
| Reina Lohaye | 9/10 | 6543 days | 23% |
| Iain | 9/10 | 6575 days | 23% |
| Gav | 6/10 | 6575 days | 20% |
| Anneli | 6/10 | 6576 days | 20% |
| Davinia | 9/10 | 6603 days | 23% |
| Rob Boston | 1/10 | 6676 days | 9% |
| Will | 9/10 | 6844 days | 23% |
| clairekidd | 9/10 | 6857 days | 23% |
| Silke | 9/10 | 6865 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
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 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 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
9.86% 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.