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 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
82.40%
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 | 3834 days | 100% |
| Mijke Boesten | 8/10 | 3889 days | 86% |
| Anders Hauke | 8/10 | 3890 days | 86% |
| Lengxi | 8/10 | 3890 days | 86% |
| Arvid Hellquist | 9/10 | 4262 days | 0% |
| Steven Lotrian | 9/10 | 4609 days | 92% |
| Alex Artigues | 10/10 | 4657 days | 93% |
| Serge Garcin | 10/10 | 4657 days | 93% |
| Tourist101 | 2/10 | 5111 days | 27% |
| kayburns | 9/10 | 5172 days | 92% |
| Alison Rosser | 7/10 | 5348 days | 85% |
| Helen & Laurence | 8/10 | 5423 days | 91% |
| Kris Gijbels | 8/10 | 5669 days | 91% |
| Mike | 6/10 | 5707 days | 76% |
| Stefan Morris | 8/10 | 5710 days | 91% |
| Jessie Currie | 7/10 | 5710 days | 85% |
| Barry | 9/10 | 5712 days | 92% |
| Melanie Armbruster | 6/10 | 5715 days | 76% |
| Stefanie Halbrock | 5/10 | 5715 days | 64% |
| Jim Thomsen | 8/10 | 5716 days | 91% |
| Kate Thomsen | 8/10 | 5716 days | 91% |
| Denecke Thorsten | 7/10 | 6065 days | 85% |
| M and H Lunn | 8/10 | 6065 days | 91% |
| Henrik Plichta | 9/10 | 6065 days | 92% |
| Michael | 10/10 | 6066 days | 93% |
| San Ahuia | 5/10 | 6075 days | 64% |
| Amer | 10/10 | 6081 days | 93% |
| Coby Aalbrecht | 7/10 | 6083 days | 85% |
| Andreas Sterki | 8/10 | 6154 days | 91% |
| X Otte | 7/10 | 6154 days | 85% |
| Hansjoerg Ehrmann | 9/10 | 6157 days | 92% |
| Sophie Keate | 8/10 | 6274 days | 91% |
| Catherine Smiles | 10/10 | 6304 days | 93% |
| Martina | 6/10 | 6390 days | 76% |
| IanM | 8/10 | 6390 days | 91% |
| MarielR | 9/10 | 6408 days | 92% |
| Joel | 9/10 | 6410 days | 92% |
| Brigette Guikens | 10/10 | 6411 days | 93% |
| Keith | 7/10 | 6414 days | 85% |
| JuliaG1 | 8/10 | 6423 days | 91% |
| DavidMurray | 8/10 | 6424 days | 91% |
| RosC | 6/10 | 6425 days | 76% |
| AndrewF78 | 9/10 | 6426 days | 92% |
| EmmaB1 | 9/10 | 6436 days | 92% |
| ClaudiaK | 10/10 | 6439 days | 93% |
| ArnarF | 9/10 | 6449 days | 92% |
| SonjaS | 10/10 | 6449 days | 93% |
| Burkhalter | 9/10 | 6461 days | 92% |
| Rene | 7/10 | 6462 days | 85% |
| Paula | 8/10 | 6515 days | 91% |
| Teresa | 10/10 | 6521 days | 93% |
| Kay | 10/10 | 6569 days | 93% |
| Jimmy | 9/10 | 6587 days | 92% |
| Anna | 10/10 | 6587 days | 93% |
| sabine | 10/10 | 6587 days | 93% |
| Elisabeth | 10/10 | 6596 days | 93% |
| Terneal King | 7/10 | 6628 days | 85% |
| Helen | 6/10 | 6638 days | 76% |
| Nicnac | 8/10 | 6755 days | 91% |
| Mark | 10/10 | 6760 days | 93% |
| Joanne M | 7/10 | 6766 days | 85% |
| Anna | 10/10 | 6767 days | 93% |
| Leila | 9/10 | 6770 days | 92% |
| Adam Richards | 8/10 | 6770 days | 91% |
| Lena1 | 9/10 | 6790 days | 92% |
| Stephanie | 9/10 | 6802 days | 92% |
| Hanna | 6/10 | 6803 days | 76% |
| Maree | 8/10 | 6803 days | 91% |
| Orlaith | 9/10 | 6803 days | 92% |
| Lisa | 8/10 | 6803 days | 91% |
| Stephanie Jones | 6/10 | 6830 days | 76% |
| Paula Smith | 7/10 | 6833 days | 85% |
| Bridgy | 8/10 | 7080 days | 91% |
| JanKovar | 6/10 | 7108 days | 76% |
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
-3.23% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 68 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 | -3.18% |
| 198 | -3.20% |
| 199 | -3.21% |
| 200 | -3.23% |
| 201 | -3.25% |
| 202 | -3.26% |
| 203 | -3.28% |
| … | … |
Balancing Adjustment
3.24% 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
82%
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.