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 Waitomo Adventures Ltd.
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.
Waitomo Adventures Ltd
Valid Reviews
93 Valid Reviews
The Waitomo Adventures Ltd experience has a total of 94 reviews. There are 93 valid reviews that are included when calculating the ranking score and 1 invalid review 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 93 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 32 |
|
34% |
| 9/10 | 22 |
|
24% |
| 8/10 | 23 |
|
25% |
| 7/10 | 8 |
|
9% |
| 6/10 | 5 |
|
5% |
| 5/10 | 2 |
|
2% |
| 4/10 | 0 |
|
0% |
| 3/10 | 1 |
|
1% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
86.13% Average
The raw data average (mean) for all the Waitomo Adventures Ltd valid reviews is 86.13% and is based on 93 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
77 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 93 valid reviews, the experience has 77 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 77 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 23 |
|
30% |
| 9/10 | 20 |
|
26% |
| 8/10 | 20 |
|
26% |
| 7/10 | 8 |
|
10% |
| 6/10 | 3 |
|
4% |
| 5/10 | 2 |
|
3% |
| 4/10 | 0 |
|
0% |
| 3/10 | 1 |
|
1% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
85.32% Average
The raw data average (mean) for all the Waitomo Adventures Ltd face-to-face reviews is 85.32% and is based on 77 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
87.50%
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 |
|---|---|---|---|
| Dennis | 10/10 | 3265 days | 100% |
| Thomas Klinting | 10/10 | 3319 days | 94% |
| Franz Mesey | 9/10 | 3333 days | 91% |
| Judit Van lanen | 10/10 | 3352 days | 90% |
| Jack Robinson | 8/10 | 3390 days | 83% |
| Mikulas and Dominika | 8/10 | 3412 days | 80% |
| Elizabeth Braidotti | 10/10 | 3462 days | 76% |
| Craig Forsyth | 10/10 | 3578 days | 63% |
| Lea Behnem | 10/10 | 3652 days | 54% |
| Nicolas Justin | 7/10 | 3996 days | 9% |
| Stephanie Piou | 8/10 | 3996 days | 12% |
| Alex | 9/10 | 4024 days | 9% |
| Devan Sheppard | 10/10 | 4093 days | 1% |
| Nina Coopmans | 7/10 | 4705 days | 24% |
| Katherine | 10/10 | 4729 days | 28% |
| Lieven De Vlaminck | 9/10 | 4735 days | 27% |
| Andy | 10/10 | 4826 days | 28% |
| Ron | 9/10 | 4830 days | 27% |
| Bart Slingerland | 9/10 | 5085 days | 27% |
| Birds Tubbs | 10/10 | 5086 days | 28% |
| Malena | 10/10 | 5101 days | 28% |
| Schael | 10/10 | 5105 days | 28% |
| Ryan Pynappels | 9/10 | 5112 days | 27% |
| Tobias Forst | 8/10 | 5193 days | 27% |
| Sarah and Soren | 9/10 | 5198 days | 27% |
| Alberto Redner | 10/10 | 5208 days | 28% |
| Dozza | 10/10 | 5253 days | 28% |
| Sarah James | 10/10 | 5435 days | 28% |
| Nick Taylor | 10/10 | 5435 days | 28% |
| Laurent P | 10/10 | 5439 days | 28% |
| Paap | 8/10 | 5472 days | 27% |
| Wouter Jansen | 8/10 | 5472 days | 27% |
| Luise Jaeger | 3/10 | 5485 days | 0% |
| Steff | 9/10 | 5487 days | 27% |
| wannaraft | 10/10 | 5495 days | 28% |
| elpo | 6/10 | 5740 days | 19% |
| kempt | 8/10 | 5771 days | 27% |
| Andy | 8/10 | 5822 days | 27% |
| Sam Bishop | 10/10 | 5832 days | 28% |
| Kay Beaumont | 10/10 | 5834 days | 28% |
| Johan | 10/10 | 5842 days | 28% |
| Jakob Pedersen | 7/10 | 5842 days | 24% |
| Jens van Evp | 9/10 | 5856 days | 27% |
| Max Van der Zalm | 8/10 | 5856 days | 27% |
| Carolina Gonzalez | 8/10 | 5858 days | 27% |
| Kasper | 9/10 | 5858 days | 27% |
| Chance McGuire | 10/10 | 5860 days | 28% |
| katesc | 9/10 | 5911 days | 27% |
| rosalindm | 9/10 | 5916 days | 27% |
| jennyb | 9/10 | 5920 days | 27% |
| Thomas Willi | 10/10 | 5932 days | 28% |
| Jess Pasos | 10/10 | 5941 days | 28% |
| Nikki Turner | 8/10 | 6087 days | 27% |
| Sejna | 8/10 | 6108 days | 27% |
| michellew | 10/10 | 6114 days | 28% |
| erikholland | 8/10 | 6167 days | 27% |
| mariea | 9/10 | 6178 days | 27% |
| Krapels | 9/10 | 6190 days | 27% |
| Halley | 5/10 | 6196 days | 13% |
| Katie | 10/10 | 6214 days | 28% |
| Ian S | 8/10 | 6215 days | 27% |
| Debbie | 7/10 | 6216 days | 24% |
| Daniel | 8/10 | 6225 days | 27% |
| Kristy825 | 10/10 | 6229 days | 28% |
| Limor | 6/10 | 6237 days | 19% |
| Prentner | 6/10 | 6246 days | 19% |
| Sonja | 9/10 | 6271 days | 27% |
| Bronagh Mcartan | 9/10 | 6414 days | 27% |
| Tim | 10/10 | 6438 days | 28% |
| Brent Scanlan | 10/10 | 6508 days | 28% |
| Meike Biel | 10/10 | 6516 days | 28% |
| Hendrik | 6/10 | 6558 days | 19% |
| Sabrina | 8/10 | 6558 days | 27% |
| Peter Aston | 5/10 | 6558 days | 13% |
| helga | 9/10 | 6559 days | 27% |
| Janne | 8/10 | 6569 days | 27% |
| Melissa Steedman | 9/10 | 6605 days | 27% |
| gemma1 | 6/10 | 6610 days | 19% |
| Francesco | 8/10 | 6640 days | 27% |
| Jim&Rachel | 9/10 | 6723 days | 27% |
| MarkReid | 10/10 | 6856 days | 28% |
| HalRoberts | 8/10 | 6878 days | 27% |
| David | 9/10 | 6887 days | 27% |
| Justin | 8/10 | 6887 days | 27% |
| Alex | 8/10 | 6894 days | 27% |
| Hilary | 7/10 | 6903 days | 24% |
| Roran | 7/10 | 6913 days | 24% |
| Nina | 10/10 | 6938 days | 28% |
| Inga | 9/10 | 6938 days | 27% |
| Italy | 8/10 | 6938 days | 27% |
| Nina | 8/10 | 6938 days | 27% |
| Helen | 7/10 | 6938 days | 24% |
| JuanPablo | 7/10 | 6955 days | 24% |
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 Waitomo Adventures Ltd experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.15% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 53 days. However the Waitomo Adventures Ltd 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 Waitomo Adventures Ltd experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.09% |
| 198 | -4.11% |
| 199 | -4.13% |
| 200 | -4.15% |
| 201 | -4.17% |
| 202 | -4.19% |
| 203 | -4.21% |
| … | … |
Balancing Adjustment
2.17% 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
86%
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.