Kia ora, 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 Caveworld.
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 Caveworld
Valid Reviews
74 Valid Reviews
The Waitomo Caveworld experience has a total of 74 valid reviews. There are no 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 74 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 15 |
|
20% |
| 9/10 | 18 |
|
24% |
| 8/10 | 20 |
|
27% |
| 7/10 | 10 |
|
14% |
| 6/10 | 8 |
|
11% |
| 5/10 | 2 |
|
3% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
1% |
| 1/10 | 0 |
|
0% |
81.35% Average
The raw data average (mean) for all the Waitomo Caveworld valid reviews is 81.35% and is based on 74 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
68 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 74 valid reviews, the experience has 68 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 68 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 15 |
|
22% |
| 9/10 | 16 |
|
24% |
| 8/10 | 19 |
|
28% |
| 7/10 | 9 |
|
13% |
| 6/10 | 7 |
|
10% |
| 5/10 | 2 |
|
3% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
82.50% Average
The raw data average (mean) for all the Waitomo Caveworld face-to-face reviews is 82.50% and is based on 68 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
82.18%
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 |
|---|---|---|---|
| Cassandra Geyer | 9/10 | 3335 days | 100% |
| Mijke Boesten | 8/10 | 3390 days | 92% |
| Anders Hauke | 8/10 | 3391 days | 92% |
| Lengxi | 8/10 | 3391 days | 92% |
| Arvid Hellquist | 9/10 | 3763 days | 48% |
| Steven Lotrian | 9/10 | 4110 days | 6% |
| Alex Artigues | 10/10 | 4158 days | 0% |
| Serge Garcin | 10/10 | 4158 days | 0% |
| Tourist101 | 2/10 | 4612 days | 1% |
| kayburns | 9/10 | 4673 days | 35% |
| Alison Rosser | 7/10 | 4849 days | 31% |
| Helen & Laurence | 8/10 | 4924 days | 34% |
| Kris Gijbels | 8/10 | 5170 days | 34% |
| Mike | 6/10 | 5208 days | 27% |
| Stefan Morris | 8/10 | 5211 days | 34% |
| Jessie Currie | 7/10 | 5211 days | 31% |
| Barry | 9/10 | 5213 days | 35% |
| Melanie Armbruster | 6/10 | 5216 days | 27% |
| Stefanie Halbrock | 5/10 | 5216 days | 21% |
| Jim Thomsen | 8/10 | 5217 days | 34% |
| Kate Thomsen | 8/10 | 5217 days | 34% |
| Denecke Thorsten | 7/10 | 5566 days | 31% |
| M and H Lunn | 8/10 | 5566 days | 34% |
| Henrik Plichta | 9/10 | 5566 days | 35% |
| Michael | 10/10 | 5567 days | 36% |
| San Ahuia | 5/10 | 5576 days | 21% |
| Amer | 10/10 | 5582 days | 36% |
| Coby Aalbrecht | 7/10 | 5584 days | 31% |
| Andreas Sterki | 8/10 | 5655 days | 34% |
| X Otte | 7/10 | 5655 days | 31% |
| Hansjoerg Ehrmann | 9/10 | 5658 days | 35% |
| Sophie Keate | 8/10 | 5775 days | 34% |
| Catherine Smiles | 10/10 | 5805 days | 36% |
| Martina | 6/10 | 5891 days | 27% |
| IanM | 8/10 | 5891 days | 34% |
| MarielR | 9/10 | 5909 days | 35% |
| Joel | 9/10 | 5911 days | 35% |
| Brigette Guikens | 10/10 | 5912 days | 36% |
| Keith | 7/10 | 5915 days | 31% |
| JuliaG1 | 8/10 | 5924 days | 34% |
| DavidMurray | 8/10 | 5925 days | 34% |
| RosC | 6/10 | 5926 days | 27% |
| AndrewF78 | 9/10 | 5927 days | 35% |
| EmmaB1 | 9/10 | 5937 days | 35% |
| ClaudiaK | 10/10 | 5940 days | 36% |
| ArnarF | 9/10 | 5950 days | 35% |
| SonjaS | 10/10 | 5950 days | 36% |
| Burkhalter | 9/10 | 5962 days | 35% |
| Rene | 7/10 | 5963 days | 31% |
| Paula | 8/10 | 6017 days | 34% |
| Teresa | 10/10 | 6022 days | 36% |
| Kay | 10/10 | 6070 days | 36% |
| Jimmy | 9/10 | 6089 days | 35% |
| Anna | 10/10 | 6089 days | 36% |
| sabine | 10/10 | 6089 days | 36% |
| Elisabeth | 10/10 | 6097 days | 36% |
| Terneal King | 7/10 | 6129 days | 31% |
| Helen | 6/10 | 6139 days | 27% |
| Nicnac | 8/10 | 6257 days | 34% |
| Mark | 10/10 | 6261 days | 36% |
| Joanne M | 7/10 | 6267 days | 31% |
| Anna | 10/10 | 6268 days | 36% |
| Leila | 9/10 | 6271 days | 35% |
| Adam Richards | 8/10 | 6271 days | 34% |
| Lena1 | 9/10 | 6291 days | 35% |
| Stephanie | 9/10 | 6303 days | 35% |
| Hanna | 6/10 | 6304 days | 27% |
| Maree | 8/10 | 6304 days | 34% |
| Orlaith | 9/10 | 6304 days | 35% |
| Lisa | 8/10 | 6304 days | 34% |
| Stephanie Jones | 6/10 | 6331 days | 27% |
| Paula Smith | 7/10 | 6334 days | 31% |
| Bridgy | 8/10 | 6581 days | 34% |
| JanKovar | 6/10 | 6609 days | 27% |
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 Caveworld experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-2.74% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 94 days. However the Waitomo Caveworld 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 Caveworld experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -2.70% |
| 198 | -2.71% |
| 199 | -2.72% |
| 200 | -2.74% |
| 201 | -2.75% |
| 202 | -2.76% |
| 203 | -2.78% |
| … | … |
Balancing Adjustment
3.16% 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
83%
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.