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
69.75%
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 | 1883 days | 100% |
| craig hardy | 1/10 | 2612 days | 29% |
| Viv stefadouros | 9/10 | 2765 days | 64% |
| Suzanne | 1/10 | 2796 days | 26% |
| kiruthika vijayakumar | 1/10 | 2796 days | 26% |
| Ellie Pask | 1/10 | 2857 days | 25% |
| Justine Langero | 10/10 | 2980 days | 56% |
| SR SR | 1/10 | 3100 days | 21% |
| Tom Anders | 9/10 | 3188 days | 47% |
| Estelle Coquard | 7/10 | 3194 days | 44% |
| Kathrin Redl | 6/10 | 3209 days | 40% |
| Emily Noyd | 8/10 | 3211 days | 46% |
| Maxim Motheus | 8/10 | 3247 days | 44% |
| Emil Black Christian | 9/10 | 3247 days | 45% |
| Charn Tiebtienrat | 1/10 | 3282 days | 18% |
| peter salfrais | 1/10 | 3282 days | 18% |
| Pierre Villaume-Odile | 7/10 | 3305 days | 40% |
| unhappycustomer | 3/10 | 3374 days | 22% |
| Brendan Carton | 1/10 | 3375 days | 16% |
| Funk | 7/10 | 3496 days | 33% |
| Calvin Shi | 1/10 | 3588 days | 13% |
| pat rao | 1/10 | 3616 days | 12% |
| Justin Little | 1/10 | 3647 days | 12% |
| Focalvisions | 7/10 | 3647 days | 27% |
| Mischelle Mills | 1/10 | 3861 days | 8% |
| ilove totravel | 5/10 | 3923 days | 14% |
| Anna Sternberg | 8/10 | 3955 days | 17% |
| Jan Kerkhoff | 9/10 | 3958 days | 17% |
| Daniel Garcia Dezgado | 8/10 | 3963 days | 16% |
| Maria = Moller Hansen | 9/10 | 3965 days | 16% |
| Gassat | 9/10 | 3976 days | 16% |
| Felix | 4/10 | 4002 days | 10% |
| Corban Hill | 1/10 | 4013 days | 6% |
| Cyndyl Richards | 1/10 | 4105 days | 4% |
| John Stroup | 1/10 | 4105 days | 4% |
| paulweig | 8/10 | 4288 days | 4% |
| Epi Gates | 6/10 | 4288 days | 3% |
| Andé Moreira | 1/10 | 4319 days | 1% |
| Stella Thoben | 7/10 | 4321 days | 2% |
| Anna Niesl | 7/10 | 4325 days | 2% |
| Kristina Wells | 1/10 | 4378 days | 0% |
| alastair maceachern | 1/10 | 4378 days | 0% |
| hirini2371 | 1/10 | 4439 days | 8% |
| Lisa Ruhfus | 10/10 | 4693 days | 20% |
| Danpaley | 1/10 | 4744 days | 8% |
| Ashley Mckenney | 8/10 | 4758 days | 20% |
| Isabella Abele | 7/10 | 4775 days | 19% |
| smileyducky | 1/10 | 4865 days | 8% |
| Lennart Lundberg | 7/10 | 5021 days | 19% |
| Claudia Jackson and Geoffroy van Roelenbosch | 7/10 | 5033 days | 19% |
| Chrissy Crebas | 6/10 | 5035 days | 18% |
| Beth and Daisy | 8/10 | 5038 days | 20% |
| Tim Wright | 8/10 | 5076 days | 20% |
| Emma Wilkinson | 8/10 | 5077 days | 20% |
| Katny | 8/10 | 5078 days | 20% |
| SandyS | 8/10 | 5109 days | 20% |
| Katy | 8/10 | 5347 days | 20% |
| Christine T | 8/10 | 5409 days | 20% |
| Marcio Moretti | 9/10 | 5425 days | 20% |
| ohSNAP | 3/10 | 5443 days | 11% |
| Hokang Kim | 3/10 | 5505 days | 11% |
| Lindsay Brown | 5/10 | 5515 days | 16% |
| confederatesoldier | 1/10 | 5535 days | 8% |
| Annabel | 1/10 | 5566 days | 8% |
| miniappleses | 8/10 | 5566 days | 20% |
| Ozhan | 8/10 | 5789 days | 20% |
| Deahne | 8/10 | 5799 days | 20% |
| Yuko | 9/10 | 5799 days | 20% |
| Craig | 10/10 | 5806 days | 20% |
| Constance | 7/10 | 5815 days | 19% |
| Kristen | 8/10 | 5822 days | 20% |
| frank | 5/10 | 5823 days | 16% |
| Grace | 9/10 | 5853 days | 20% |
| Claudia Schmidt | 9/10 | 5865 days | 20% |
| Helga | 6/10 | 5923 days | 18% |
| Sophie | 10/10 | 5946 days | 20% |
| Carmen | 10/10 | 6001 days | 20% |
| Wolfgang | 7/10 | 6021 days | 19% |
| Anke | 8/10 | 6098 days | 20% |
| Hernando | 9/10 | 6125 days | 20% |
| Klaus | 7/10 | 6129 days | 19% |
| Corinne | 8/10 | 6133 days | 20% |
| Yumi | 7/10 | 6142 days | 19% |
| Lena | 8/10 | 6142 days | 20% |
| Vicky Elliott | 9/10 | 6160 days | 20% |
| Sophia | 10/10 | 6162 days | 20% |
| Reina Lohaye | 9/10 | 6164 days | 20% |
| Iain | 9/10 | 6196 days | 20% |
| Gav | 6/10 | 6196 days | 18% |
| Anneli | 6/10 | 6197 days | 18% |
| Davinia | 9/10 | 6224 days | 20% |
| Rob Boston | 1/10 | 6297 days | 8% |
| Will | 9/10 | 6464 days | 20% |
| clairekidd | 9/10 | 6477 days | 20% |
| Silke | 9/10 | 6485 days | 20% |
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
-4.01% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 40 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 | -3.95% |
| 198 | -3.97% |
| 199 | -3.99% |
| 200 | -4.01% |
| 201 | -4.03% |
| 202 | -4.05% |
| 203 | -4.07% |
| … | … |
Balancing Adjustment
9.69% 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.