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
69.55%
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 | 1847 days | 100% |
| craig hardy | 1/10 | 2577 days | 28% |
| Viv stefadouros | 9/10 | 2730 days | 64% |
| Suzanne | 1/10 | 2761 days | 25% |
| kiruthika vijayakumar | 1/10 | 2761 days | 25% |
| Ellie Pask | 1/10 | 2822 days | 25% |
| Justine Langero | 10/10 | 2944 days | 56% |
| SR SR | 1/10 | 3065 days | 21% |
| Tom Anders | 9/10 | 3153 days | 48% |
| Estelle Coquard | 7/10 | 3158 days | 45% |
| Kathrin Redl | 6/10 | 3173 days | 41% |
| Emily Noyd | 8/10 | 3175 days | 46% |
| Maxim Motheus | 8/10 | 3211 days | 45% |
| Emil Black Christian | 9/10 | 3211 days | 45% |
| Charn Tiebtienrat | 1/10 | 3247 days | 18% |
| peter salfrais | 1/10 | 3247 days | 18% |
| Pierre Villaume-Odile | 7/10 | 3269 days | 40% |
| unhappycustomer | 3/10 | 3339 days | 22% |
| Brendan Carton | 1/10 | 3339 days | 16% |
| Funk | 7/10 | 3461 days | 33% |
| Calvin Shi | 1/10 | 3553 days | 13% |
| pat rao | 1/10 | 3581 days | 12% |
| Justin Little | 1/10 | 3612 days | 12% |
| Focalvisions | 7/10 | 3612 days | 28% |
| Mischelle Mills | 1/10 | 3826 days | 8% |
| ilove totravel | 5/10 | 3887 days | 14% |
| Anna Sternberg | 8/10 | 3919 days | 17% |
| Jan Kerkhoff | 9/10 | 3922 days | 17% |
| Daniel Garcia Dezgado | 8/10 | 3927 days | 17% |
| Maria = Moller Hansen | 9/10 | 3929 days | 17% |
| Gassat | 9/10 | 3940 days | 17% |
| Felix | 4/10 | 3966 days | 10% |
| Corban Hill | 1/10 | 3977 days | 6% |
| Cyndyl Richards | 1/10 | 4069 days | 4% |
| John Stroup | 1/10 | 4069 days | 4% |
| paulweig | 8/10 | 4252 days | 4% |
| Epi Gates | 6/10 | 4252 days | 4% |
| Andé Moreira | 1/10 | 4283 days | 1% |
| Stella Thoben | 7/10 | 4285 days | 3% |
| Anna Niesl | 7/10 | 4289 days | 3% |
| Kristina Wells | 1/10 | 4342 days | 0% |
| alastair maceachern | 1/10 | 4342 days | 0% |
| hirini2371 | 1/10 | 4403 days | 8% |
| Lisa Ruhfus | 10/10 | 4657 days | 20% |
| Danpaley | 1/10 | 4708 days | 8% |
| Ashley Mckenney | 8/10 | 4722 days | 19% |
| Isabella Abele | 7/10 | 4739 days | 18% |
| smileyducky | 1/10 | 4830 days | 8% |
| Lennart Lundberg | 7/10 | 4985 days | 18% |
| Claudia Jackson and Geoffroy van Roelenbosch | 7/10 | 4997 days | 18% |
| Chrissy Crebas | 6/10 | 4999 days | 17% |
| Beth and Daisy | 8/10 | 5002 days | 19% |
| Tim Wright | 8/10 | 5040 days | 19% |
| Emma Wilkinson | 8/10 | 5041 days | 19% |
| Katny | 8/10 | 5042 days | 19% |
| SandyS | 8/10 | 5073 days | 19% |
| Katy | 8/10 | 5312 days | 19% |
| Christine T | 8/10 | 5373 days | 19% |
| Marcio Moretti | 9/10 | 5389 days | 19% |
| ohSNAP | 3/10 | 5407 days | 10% |
| Hokang Kim | 3/10 | 5469 days | 10% |
| Lindsay Brown | 5/10 | 5479 days | 15% |
| confederatesoldier | 1/10 | 5499 days | 8% |
| Annabel | 1/10 | 5530 days | 8% |
| miniappleses | 8/10 | 5530 days | 19% |
| Ozhan | 8/10 | 5754 days | 19% |
| Deahne | 8/10 | 5764 days | 19% |
| Yuko | 9/10 | 5764 days | 19% |
| Craig | 10/10 | 5771 days | 20% |
| Constance | 7/10 | 5779 days | 18% |
| Kristen | 8/10 | 5786 days | 19% |
| frank | 5/10 | 5787 days | 15% |
| Grace | 9/10 | 5818 days | 19% |
| Claudia Schmidt | 9/10 | 5830 days | 19% |
| Helga | 6/10 | 5888 days | 17% |
| Sophie | 10/10 | 5911 days | 20% |
| Carmen | 10/10 | 5966 days | 20% |
| Wolfgang | 7/10 | 5986 days | 18% |
| Anke | 8/10 | 6063 days | 19% |
| Hernando | 9/10 | 6089 days | 19% |
| Klaus | 7/10 | 6093 days | 18% |
| Corinne | 8/10 | 6097 days | 19% |
| Yumi | 7/10 | 6106 days | 18% |
| Lena | 8/10 | 6106 days | 19% |
| Vicky Elliott | 9/10 | 6124 days | 19% |
| Sophia | 10/10 | 6126 days | 20% |
| Reina Lohaye | 9/10 | 6128 days | 19% |
| Iain | 9/10 | 6160 days | 19% |
| Gav | 6/10 | 6160 days | 17% |
| Anneli | 6/10 | 6161 days | 17% |
| Davinia | 9/10 | 6188 days | 19% |
| Rob Boston | 1/10 | 6261 days | 8% |
| Will | 9/10 | 6429 days | 19% |
| clairekidd | 9/10 | 6442 days | 19% |
| Silke | 9/10 | 6450 days | 19% |
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 43 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.