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
70.60%
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 | 2403 days | 100% |
| craig hardy | 1/10 | 3132 days | 22% |
| Viv stefadouros | 9/10 | 3286 days | 53% |
| Suzanne | 1/10 | 3316 days | 18% |
| kiruthika vijayakumar | 1/10 | 3316 days | 18% |
| Ellie Pask | 1/10 | 3377 days | 17% |
| Justine Langero | 10/10 | 3500 days | 42% |
| SR SR | 1/10 | 3620 days | 12% |
| Tom Anders | 9/10 | 3709 days | 31% |
| Estelle Coquard | 7/10 | 3714 days | 28% |
| Kathrin Redl | 6/10 | 3729 days | 25% |
| Emily Noyd | 8/10 | 3731 days | 29% |
| Maxim Motheus | 8/10 | 3767 days | 27% |
| Emil Black Christian | 9/10 | 3767 days | 28% |
| Charn Tiebtienrat | 1/10 | 3802 days | 8% |
| peter salfrais | 1/10 | 3802 days | 8% |
| Pierre Villaume-Odile | 7/10 | 3825 days | 23% |
| unhappycustomer | 3/10 | 3894 days | 9% |
| Brendan Carton | 1/10 | 3895 days | 6% |
| Funk | 7/10 | 4016 days | 13% |
| Calvin Shi | 1/10 | 4108 days | 1% |
| pat rao | 1/10 | 4136 days | 1% |
| Justin Little | 1/10 | 4167 days | 0% |
| Focalvisions | 7/10 | 4167 days | 6% |
| Mischelle Mills | 1/10 | 4382 days | 6% |
| ilove totravel | 5/10 | 4443 days | 16% |
| Anna Sternberg | 8/10 | 4475 days | 22% |
| Jan Kerkhoff | 9/10 | 4478 days | 22% |
| Daniel Garcia Dezgado | 8/10 | 4483 days | 22% |
| Maria = Moller Hansen | 9/10 | 4485 days | 22% |
| Gassat | 9/10 | 4496 days | 22% |
| Felix | 4/10 | 4522 days | 13% |
| Corban Hill | 1/10 | 4533 days | 6% |
| Cyndyl Richards | 1/10 | 4625 days | 6% |
| John Stroup | 1/10 | 4625 days | 6% |
| paulweig | 8/10 | 4808 days | 22% |
| Epi Gates | 6/10 | 4808 days | 19% |
| Andé Moreira | 1/10 | 4839 days | 6% |
| Stella Thoben | 7/10 | 4841 days | 21% |
| Anna Niesl | 7/10 | 4845 days | 21% |
| Kristina Wells | 1/10 | 4898 days | 6% |
| alastair maceachern | 1/10 | 4898 days | 6% |
| hirini2371 | 1/10 | 4959 days | 6% |
| Lisa Ruhfus | 10/10 | 5213 days | 22% |
| Danpaley | 1/10 | 5264 days | 6% |
| Ashley Mckenney | 8/10 | 5278 days | 22% |
| Isabella Abele | 7/10 | 5295 days | 21% |
| smileyducky | 1/10 | 5386 days | 6% |
| Lennart Lundberg | 7/10 | 5541 days | 21% |
| Claudia Jackson and Geoffroy van Roelenbosch | 7/10 | 5553 days | 21% |
| Chrissy Crebas | 6/10 | 5555 days | 19% |
| Beth and Daisy | 8/10 | 5558 days | 22% |
| Tim Wright | 8/10 | 5596 days | 22% |
| Emma Wilkinson | 8/10 | 5597 days | 22% |
| Katny | 8/10 | 5598 days | 22% |
| SandyS | 8/10 | 5629 days | 22% |
| Katy | 8/10 | 5868 days | 22% |
| Christine T | 8/10 | 5929 days | 22% |
| Marcio Moretti | 9/10 | 5945 days | 22% |
| ohSNAP | 3/10 | 5963 days | 10% |
| Hokang Kim | 3/10 | 6025 days | 10% |
| Lindsay Brown | 5/10 | 6035 days | 16% |
| confederatesoldier | 1/10 | 6055 days | 6% |
| Annabel | 1/10 | 6086 days | 6% |
| miniappleses | 8/10 | 6086 days | 22% |
| Ozhan | 8/10 | 6309 days | 22% |
| Deahne | 8/10 | 6319 days | 22% |
| Yuko | 9/10 | 6319 days | 22% |
| Craig | 10/10 | 6326 days | 22% |
| Constance | 7/10 | 6335 days | 21% |
| Kristen | 8/10 | 6342 days | 22% |
| frank | 5/10 | 6343 days | 16% |
| Grace | 9/10 | 6374 days | 22% |
| Claudia Schmidt | 9/10 | 6385 days | 22% |
| Helga | 6/10 | 6443 days | 19% |
| Sophie | 10/10 | 6466 days | 22% |
| Carmen | 10/10 | 6521 days | 22% |
| Wolfgang | 7/10 | 6541 days | 21% |
| Anke | 8/10 | 6619 days | 22% |
| Hernando | 9/10 | 6645 days | 22% |
| Klaus | 7/10 | 6649 days | 21% |
| Corinne | 8/10 | 6653 days | 22% |
| Yumi | 7/10 | 6662 days | 21% |
| Lena | 8/10 | 6662 days | 22% |
| Vicky Elliott | 9/10 | 6680 days | 22% |
| Sophia | 10/10 | 6682 days | 22% |
| Reina Lohaye | 9/10 | 6684 days | 22% |
| Iain | 9/10 | 6716 days | 22% |
| Gav | 6/10 | 6716 days | 19% |
| Anneli | 6/10 | 6717 days | 19% |
| Davinia | 9/10 | 6744 days | 22% |
| Rob Boston | 1/10 | 6817 days | 6% |
| Will | 9/10 | 6985 days | 22% |
| clairekidd | 9/10 | 6998 days | 22% |
| Silke | 9/10 | 7006 days | 22% |
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
-2.47% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 105 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 | -2.43% |
| 198 | -2.45% |
| 199 | -2.46% |
| 200 | -2.47% |
| 201 | -2.48% |
| 202 | -2.50% |
| 203 | -2.51% |
| … | … |
Balancing Adjustment
8.11% 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
76%
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.