G'day, 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
87.30%
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 | 3442 days | 100% |
| Thomas Klinting | 10/10 | 3496 days | 93% |
| Franz Mesey | 9/10 | 3511 days | 91% |
| Judit Van lanen | 10/10 | 3529 days | 89% |
| Jack Robinson | 8/10 | 3567 days | 83% |
| Mikulas and Dominika | 8/10 | 3589 days | 80% |
| Elizabeth Braidotti | 10/10 | 3639 days | 76% |
| Craig Forsyth | 10/10 | 3756 days | 62% |
| Lea Behnem | 10/10 | 3829 days | 53% |
| Nicolas Justin | 7/10 | 4173 days | 10% |
| Stephanie Piou | 8/10 | 4173 days | 11% |
| Alex | 9/10 | 4201 days | 8% |
| Devan Sheppard | 10/10 | 4270 days | 0% |
| Nina Coopmans | 7/10 | 4882 days | 44% |
| Katherine | 10/10 | 4906 days | 48% |
| Lieven De Vlaminck | 9/10 | 4912 days | 48% |
| Andy | 10/10 | 5003 days | 48% |
| Ron | 9/10 | 5007 days | 48% |
| Bart Slingerland | 9/10 | 5262 days | 48% |
| Birds Tubbs | 10/10 | 5263 days | 48% |
| Malena | 10/10 | 5278 days | 48% |
| Schael | 10/10 | 5282 days | 48% |
| Ryan Pynappels | 9/10 | 5289 days | 48% |
| Tobias Forst | 8/10 | 5370 days | 47% |
| Sarah and Soren | 9/10 | 5375 days | 48% |
| Alberto Redner | 10/10 | 5385 days | 48% |
| Dozza | 10/10 | 5430 days | 48% |
| Sarah James | 10/10 | 5612 days | 48% |
| Nick Taylor | 10/10 | 5612 days | 48% |
| Laurent P | 10/10 | 5616 days | 48% |
| Paap | 8/10 | 5649 days | 47% |
| Wouter Jansen | 8/10 | 5649 days | 47% |
| Luise Jaeger | 3/10 | 5662 days | 20% |
| Steff | 9/10 | 5664 days | 48% |
| wannaraft | 10/10 | 5672 days | 48% |
| elpo | 6/10 | 5917 days | 40% |
| kempt | 8/10 | 5948 days | 47% |
| Andy | 8/10 | 5999 days | 47% |
| Sam Bishop | 10/10 | 6009 days | 48% |
| Kay Beaumont | 10/10 | 6011 days | 48% |
| Johan | 10/10 | 6019 days | 48% |
| Jakob Pedersen | 7/10 | 6019 days | 44% |
| Jens van Evp | 9/10 | 6033 days | 48% |
| Max Van der Zalm | 8/10 | 6033 days | 47% |
| Carolina Gonzalez | 8/10 | 6035 days | 47% |
| Kasper | 9/10 | 6035 days | 48% |
| Chance McGuire | 10/10 | 6037 days | 48% |
| katesc | 9/10 | 6088 days | 48% |
| rosalindm | 9/10 | 6093 days | 48% |
| jennyb | 9/10 | 6097 days | 48% |
| Thomas Willi | 10/10 | 6109 days | 48% |
| Jess Pasos | 10/10 | 6118 days | 48% |
| Nikki Turner | 8/10 | 6264 days | 47% |
| Sejna | 8/10 | 6285 days | 47% |
| michellew | 10/10 | 6291 days | 48% |
| erikholland | 8/10 | 6344 days | 47% |
| mariea | 9/10 | 6355 days | 48% |
| Krapels | 9/10 | 6367 days | 48% |
| Halley | 5/10 | 6374 days | 34% |
| Katie | 10/10 | 6392 days | 48% |
| Ian S | 8/10 | 6393 days | 47% |
| Debbie | 7/10 | 6394 days | 44% |
| Daniel | 8/10 | 6402 days | 47% |
| Kristy825 | 10/10 | 6406 days | 48% |
| Limor | 6/10 | 6414 days | 40% |
| Prentner | 6/10 | 6424 days | 40% |
| Sonja | 9/10 | 6448 days | 48% |
| Bronagh Mcartan | 9/10 | 6592 days | 48% |
| Tim | 10/10 | 6616 days | 48% |
| Brent Scanlan | 10/10 | 6685 days | 48% |
| Meike Biel | 10/10 | 6693 days | 48% |
| Hendrik | 6/10 | 6735 days | 40% |
| Sabrina | 8/10 | 6735 days | 47% |
| Peter Aston | 5/10 | 6735 days | 34% |
| helga | 9/10 | 6737 days | 48% |
| Janne | 8/10 | 6747 days | 47% |
| Melissa Steedman | 9/10 | 6782 days | 48% |
| gemma1 | 6/10 | 6787 days | 40% |
| Francesco | 8/10 | 6817 days | 47% |
| Jim&Rachel | 9/10 | 6900 days | 48% |
| MarkReid | 10/10 | 7033 days | 48% |
| HalRoberts | 8/10 | 7055 days | 47% |
| David | 9/10 | 7064 days | 48% |
| Justin | 8/10 | 7064 days | 47% |
| Alex | 8/10 | 7071 days | 47% |
| Hilary | 7/10 | 7080 days | 44% |
| Roran | 7/10 | 7090 days | 44% |
| Nina | 10/10 | 7115 days | 48% |
| Inga | 9/10 | 7115 days | 48% |
| Italy | 8/10 | 7115 days | 47% |
| Nina | 8/10 | 7115 days | 47% |
| Helen | 7/10 | 7115 days | 44% |
| JuanPablo | 7/10 | 7132 days | 44% |
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
-2.26% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 116 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 | -2.23% |
| 198 | -2.24% |
| 199 | -2.25% |
| 200 | -2.26% |
| 201 | -2.27% |
| 202 | -2.29% |
| 203 | -2.30% |
| … | … |
Balancing Adjustment
1.82% 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
87%
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.