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
69.44%
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 | 1782 days | 100% |
| craig hardy | 1/10 | 2512 days | 29% |
| Viv stefadouros | 9/10 | 2665 days | 65% |
| Suzanne | 1/10 | 2696 days | 26% |
| kiruthika vijayakumar | 1/10 | 2696 days | 26% |
| Ellie Pask | 1/10 | 2757 days | 25% |
| Justine Langero | 10/10 | 2879 days | 57% |
| SR SR | 1/10 | 3000 days | 21% |
| Tom Anders | 9/10 | 3088 days | 49% |
| Estelle Coquard | 7/10 | 3093 days | 46% |
| Kathrin Redl | 6/10 | 3108 days | 42% |
| Emily Noyd | 8/10 | 3110 days | 47% |
| Maxim Motheus | 8/10 | 3146 days | 46% |
| Emil Black Christian | 9/10 | 3146 days | 46% |
| Charn Tiebtienrat | 1/10 | 3182 days | 18% |
| peter salfrais | 1/10 | 3182 days | 18% |
| Pierre Villaume-Odile | 7/10 | 3204 days | 42% |
| unhappycustomer | 3/10 | 3274 days | 23% |
| Brendan Carton | 1/10 | 3274 days | 17% |
| Funk | 7/10 | 3396 days | 35% |
| Calvin Shi | 1/10 | 3488 days | 13% |
| pat rao | 1/10 | 3516 days | 13% |
| Justin Little | 1/10 | 3547 days | 12% |
| Focalvisions | 7/10 | 3547 days | 29% |
| Mischelle Mills | 1/10 | 3761 days | 9% |
| ilove totravel | 5/10 | 3822 days | 16% |
| Anna Sternberg | 8/10 | 3854 days | 19% |
| Jan Kerkhoff | 9/10 | 3857 days | 19% |
| Daniel Garcia Dezgado | 8/10 | 3862 days | 19% |
| Maria = Moller Hansen | 9/10 | 3864 days | 19% |
| Gassat | 9/10 | 3875 days | 19% |
| Felix | 4/10 | 3901 days | 11% |
| Corban Hill | 1/10 | 3912 days | 7% |
| Cyndyl Richards | 1/10 | 4004 days | 5% |
| John Stroup | 1/10 | 4004 days | 5% |
| paulweig | 8/10 | 4187 days | 7% |
| Epi Gates | 6/10 | 4187 days | 6% |
| Andé Moreira | 1/10 | 4218 days | 2% |
| Stella Thoben | 7/10 | 4220 days | 5% |
| Anna Niesl | 7/10 | 4224 days | 5% |
| Kristina Wells | 1/10 | 4277 days | 1% |
| alastair maceachern | 1/10 | 4277 days | 1% |
| hirini2371 | 1/10 | 4338 days | 0% |
| Lisa Ruhfus | 10/10 | 4592 days | 19% |
| Danpaley | 1/10 | 4643 days | 7% |
| Ashley Mckenney | 8/10 | 4657 days | 19% |
| Isabella Abele | 7/10 | 4674 days | 18% |
| smileyducky | 1/10 | 4765 days | 7% |
| Lennart Lundberg | 7/10 | 4920 days | 18% |
| Claudia Jackson and Geoffroy van Roelenbosch | 7/10 | 4932 days | 18% |
| Chrissy Crebas | 6/10 | 4934 days | 16% |
| Beth and Daisy | 8/10 | 4937 days | 19% |
| Tim Wright | 8/10 | 4975 days | 19% |
| Emma Wilkinson | 8/10 | 4976 days | 19% |
| Katny | 8/10 | 4977 days | 19% |
| SandyS | 8/10 | 5008 days | 19% |
| Katy | 8/10 | 5247 days | 19% |
| Christine T | 8/10 | 5308 days | 19% |
| Marcio Moretti | 9/10 | 5324 days | 19% |
| ohSNAP | 3/10 | 5342 days | 10% |
| Hokang Kim | 3/10 | 5404 days | 10% |
| Lindsay Brown | 5/10 | 5414 days | 14% |
| confederatesoldier | 1/10 | 5434 days | 7% |
| Annabel | 1/10 | 5465 days | 7% |
| miniappleses | 8/10 | 5465 days | 19% |
| Ozhan | 8/10 | 5688 days | 19% |
| Deahne | 8/10 | 5699 days | 19% |
| Yuko | 9/10 | 5699 days | 19% |
| Craig | 10/10 | 5705 days | 19% |
| Constance | 7/10 | 5714 days | 18% |
| Kristen | 8/10 | 5721 days | 19% |
| frank | 5/10 | 5722 days | 14% |
| Grace | 9/10 | 5753 days | 19% |
| Claudia Schmidt | 9/10 | 5765 days | 19% |
| Helga | 6/10 | 5823 days | 16% |
| Sophie | 10/10 | 5846 days | 19% |
| Carmen | 10/10 | 5900 days | 19% |
| Wolfgang | 7/10 | 5921 days | 18% |
| Anke | 8/10 | 5998 days | 19% |
| Hernando | 9/10 | 6024 days | 19% |
| Klaus | 7/10 | 6028 days | 18% |
| Corinne | 8/10 | 6032 days | 19% |
| Yumi | 7/10 | 6041 days | 18% |
| Lena | 8/10 | 6041 days | 19% |
| Vicky Elliott | 9/10 | 6059 days | 19% |
| Sophia | 10/10 | 6061 days | 19% |
| Reina Lohaye | 9/10 | 6063 days | 19% |
| Iain | 9/10 | 6095 days | 19% |
| Gav | 6/10 | 6095 days | 16% |
| Anneli | 6/10 | 6096 days | 16% |
| Davinia | 9/10 | 6123 days | 19% |
| Rob Boston | 1/10 | 6196 days | 7% |
| Will | 9/10 | 6364 days | 19% |
| clairekidd | 9/10 | 6377 days | 19% |
| Silke | 9/10 | 6385 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
-2.98% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 76 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 | -2.94% |
| 198 | -2.95% |
| 199 | -2.97% |
| 200 | -2.98% |
| 201 | -3.00% |
| 202 | -3.01% |
| 203 | -3.03% |
| … | … |
Balancing Adjustment
9.20% 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.