Hey, 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 Wētā Cave Wellington.
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.
Wētā Cave Wellington
Valid Reviews
52 Valid Reviews
The Wētā Cave Wellington experience has a total of 52 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 52 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 15 |
|
29% |
| 9/10 | 14 |
|
27% |
| 8/10 | 11 |
|
21% |
| 7/10 | 7 |
|
13% |
| 6/10 | 2 |
|
4% |
| 5/10 | 2 |
|
4% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
2% |
| 1/10 | 0 |
|
0% |
84.04% Average
The raw data average (mean) for all the Wētā Cave Wellington valid reviews is 84.04% and is based on 52 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
50 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 52 valid reviews, the experience has 50 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 50 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 13 |
|
26% |
| 9/10 | 14 |
|
28% |
| 8/10 | 11 |
|
22% |
| 7/10 | 7 |
|
14% |
| 6/10 | 2 |
|
4% |
| 5/10 | 2 |
|
4% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
2% |
| 1/10 | 0 |
|
0% |
83.40% Average
The raw data average (mean) for all the Wētā Cave Wellington face-to-face reviews is 83.40% and is based on 50 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
85.08%
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 |
|---|---|---|---|
| Harriet and Paul | 9/10 | 3041 days | 100% |
| Margot | 7/10 | 3111 days | 87% |
| Bjorn Nielsen | 9/10 | 3113 days | 94% |
| Rose Guillaume | 10/10 | 3135 days | 93% |
| Pierre Landenne | 7/10 | 3135 days | 85% |
| Simeon Manz | 10/10 | 3147 days | 92% |
| Selma Franke | 8/10 | 3154 days | 89% |
| MARK CURPHEY | 10/10 | 3164 days | 90% |
| Sam Taylor | 8/10 | 3165 days | 88% |
| Dave Ellis | 8/10 | 3165 days | 88% |
| tinagermany111 | 5/10 | 3185 days | 63% |
| Thomas Le Buzulier | 10/10 | 3378 days | 71% |
| Daniel Idiart | 10/10 | 3383 days | 71% |
| Liam King | 9/10 | 3384 days | 70% |
| Matthew Baker | 9/10 | 3384 days | 70% |
| Karin Karlsson | 8/10 | 3387 days | 68% |
| Hana Rachfalik | 10/10 | 3390 days | 70% |
| Anthony | 8/10 | 3392 days | 68% |
| Ann-Kathrin | 8/10 | 3416 days | 66% |
| Emma Burtscher | 2/10 | 3424 days | 20% |
| Jan | 10/10 | 3427 days | 67% |
| Briony | 8/10 | 3428 days | 65% |
| David Schelensky | 10/10 | 3428 days | 67% |
| Sascha Daub | 8/10 | 3429 days | 65% |
| Richard Starkeq | 9/10 | 3429 days | 66% |
| Robin Ings | 6/10 | 3433 days | 54% |
| Flo and Frieda | 7/10 | 3452 days | 59% |
| Pierre Planchez | 9/10 | 3797 days | 33% |
| Lukas Dost | 10/10 | 3812 days | 32% |
| Greg Little | 10/10 | 3813 days | 32% |
| Iana Pauga | 10/10 | 3824 days | 31% |
| Astrid Egesten | 9/10 | 3862 days | 27% |
| James Russell | 8/10 | 4106 days | 5% |
| Hannah Watt | 7/10 | 4106 days | 4% |
| Jan Legein | 9/10 | 4107 days | 5% |
| Herman Schulz | 8/10 | 4132 days | 3% |
| Rhys Williams | 9/10 | 4154 days | 1% |
| Dan Lawson | 10/10 | 4170 days | 0% |
| Paul Taylor | 5/10 | 4488 days | 16% |
| Cloarec Guillaume | 10/10 | 4490 days | 27% |
| Clodec | 9/10 | 4490 days | 27% |
| Michal | 9/10 | 4499 days | 27% |
| Roshnie | 7/10 | 4595 days | 24% |
| Frederick Neilsen | 9/10 | 4597 days | 27% |
| Frank Claassen | 8/10 | 4856 days | 26% |
| Kimberley Mills | 9/10 | 4876 days | 27% |
| Helen & Laurence | 7/10 | 4958 days | 24% |
| Dave van Bergen | 9/10 | 5190 days | 27% |
| Anika Jedelsky | 10/10 | 5227 days | 27% |
| Kathryn Knipe | 6/10 | 5244 days | 21% |
| Stefan Morris | 7/10 | 5245 days | 24% |
| lindam | 10/10 | 5560 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 Wētā Cave Wellington experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-2.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 119 days. However the Wētā Cave Wellington 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 Wētā Cave Wellington experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -2.11% |
| 198 | -2.12% |
| 199 | -2.13% |
| 200 | -2.14% |
| 201 | -2.15% |
| 202 | -2.16% |
| 203 | -2.17% |
| … | … |
Balancing Adjustment
2.26% 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
85%
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.