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.
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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
69.39%
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 | 1972 days | 100% |
| craig hardy | 1/10 | 2701 days | 28% |
| Viv stefadouros | 9/10 | 2855 days | 63% |
| Suzanne | 1/10 | 2885 days | 25% |
| kiruthika vijayakumar | 1/10 | 2885 days | 25% |
| Ellie Pask | 1/10 | 2946 days | 24% |
| Justine Langero | 10/10 | 3069 days | 54% |
| SR SR | 1/10 | 3189 days | 20% |
| Tom Anders | 9/10 | 3278 days | 45% |
| Estelle Coquard | 7/10 | 3283 days | 42% |
| Kathrin Redl | 6/10 | 3298 days | 39% |
| Emily Noyd | 8/10 | 3300 days | 44% |
| Maxim Motheus | 8/10 | 3336 days | 42% |
| Emil Black Christian | 9/10 | 3336 days | 43% |
| Charn Tiebtienrat | 1/10 | 3371 days | 17% |
| peter salfrais | 1/10 | 3371 days | 17% |
| Pierre Villaume-Odile | 7/10 | 3394 days | 38% |
| unhappycustomer | 3/10 | 3463 days | 21% |
| Brendan Carton | 1/10 | 3464 days | 15% |
| Funk | 7/10 | 3585 days | 31% |
| Calvin Shi | 1/10 | 3677 days | 12% |
| pat rao | 1/10 | 3705 days | 11% |
| Justin Little | 1/10 | 3736 days | 11% |
| Focalvisions | 7/10 | 3736 days | 25% |
| Mischelle Mills | 1/10 | 3951 days | 7% |
| ilove totravel | 5/10 | 4012 days | 12% |
| Anna Sternberg | 8/10 | 4044 days | 14% |
| Jan Kerkhoff | 9/10 | 4047 days | 14% |
| Daniel Garcia Dezgado | 8/10 | 4052 days | 13% |
| Maria = Moller Hansen | 9/10 | 4054 days | 13% |
| Gassat | 9/10 | 4065 days | 13% |
| Felix | 4/10 | 4091 days | 8% |
| Corban Hill | 1/10 | 4102 days | 5% |
| Cyndyl Richards | 1/10 | 4194 days | 3% |
| John Stroup | 1/10 | 4194 days | 3% |
| paulweig | 8/10 | 4377 days | 0% |
| Epi Gates | 6/10 | 4377 days | 0% |
| Andé Moreira | 1/10 | 4408 days | 9% |
| Stella Thoben | 7/10 | 4410 days | 20% |
| Anna Niesl | 7/10 | 4414 days | 20% |
| Kristina Wells | 1/10 | 4467 days | 9% |
| alastair maceachern | 1/10 | 4467 days | 9% |
| hirini2371 | 1/10 | 4528 days | 9% |
| Lisa Ruhfus | 10/10 | 4782 days | 21% |
| Danpaley | 1/10 | 4833 days | 9% |
| Ashley Mckenney | 8/10 | 4847 days | 21% |
| Isabella Abele | 7/10 | 4864 days | 20% |
| smileyducky | 1/10 | 4955 days | 9% |
| Lennart Lundberg | 7/10 | 5110 days | 20% |
| Claudia Jackson and Geoffroy van Roelenbosch | 7/10 | 5122 days | 20% |
| Chrissy Crebas | 6/10 | 5124 days | 18% |
| Beth and Daisy | 8/10 | 5127 days | 21% |
| Tim Wright | 8/10 | 5165 days | 21% |
| Emma Wilkinson | 8/10 | 5166 days | 21% |
| Katny | 8/10 | 5167 days | 21% |
| SandyS | 8/10 | 5198 days | 21% |
| Katy | 8/10 | 5437 days | 21% |
| Christine T | 8/10 | 5498 days | 21% |
| Marcio Moretti | 9/10 | 5514 days | 21% |
| ohSNAP | 3/10 | 5532 days | 11% |
| Hokang Kim | 3/10 | 5594 days | 11% |
| Lindsay Brown | 5/10 | 5604 days | 16% |
| confederatesoldier | 1/10 | 5624 days | 9% |
| Annabel | 1/10 | 5655 days | 9% |
| miniappleses | 8/10 | 5655 days | 21% |
| Ozhan | 8/10 | 5878 days | 21% |
| Deahne | 8/10 | 5888 days | 21% |
| Yuko | 9/10 | 5888 days | 21% |
| Craig | 10/10 | 5895 days | 21% |
| Constance | 7/10 | 5904 days | 20% |
| Kristen | 8/10 | 5911 days | 21% |
| frank | 5/10 | 5912 days | 16% |
| Grace | 9/10 | 5943 days | 21% |
| Claudia Schmidt | 9/10 | 5954 days | 21% |
| Helga | 6/10 | 6012 days | 18% |
| Sophie | 10/10 | 6036 days | 21% |
| Carmen | 10/10 | 6090 days | 21% |
| Wolfgang | 7/10 | 6110 days | 20% |
| Anke | 8/10 | 6188 days | 21% |
| Hernando | 9/10 | 6214 days | 21% |
| Klaus | 7/10 | 6218 days | 20% |
| Corinne | 8/10 | 6222 days | 21% |
| Yumi | 7/10 | 6231 days | 20% |
| Lena | 8/10 | 6231 days | 21% |
| Vicky Elliott | 9/10 | 6249 days | 21% |
| Sophia | 10/10 | 6251 days | 21% |
| Reina Lohaye | 9/10 | 6253 days | 21% |
| Iain | 9/10 | 6285 days | 21% |
| Gav | 6/10 | 6285 days | 18% |
| Anneli | 6/10 | 6286 days | 18% |
| Davinia | 9/10 | 6313 days | 21% |
| Rob Boston | 1/10 | 6386 days | 9% |
| Will | 9/10 | 6554 days | 21% |
| clairekidd | 9/10 | 6567 days | 21% |
| Silke | 9/10 | 6575 days | 21% |
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
-3.84% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 59 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 | -3.78% |
| 198 | -3.80% |
| 199 | -3.82% |
| 200 | -3.84% |
| 201 | -3.86% |
| 202 | -3.88% |
| 203 | -3.90% |
| … | … |
Balancing Adjustment
9.82% 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.