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 Hells Gate and Wai Ora Spa.
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.
Hells Gate and Wai Ora Spa
Valid Reviews
139 Valid Reviews
The Hells Gate and Wai Ora Spa experience has a total of 145 reviews. There are 139 valid reviews that are included when calculating the ranking score and 6 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 139 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 14 |
|
10% |
| 9/10 | 15 |
|
11% |
| 8/10 | 32 |
|
23% |
| 7/10 | 30 |
|
22% |
| 6/10 | 13 |
|
9% |
| 5/10 | 15 |
|
11% |
| 4/10 | 4 |
|
3% |
| 3/10 | 10 |
|
7% |
| 2/10 | 5 |
|
4% |
| 1/10 | 1 |
|
1% |
68.42% Average
The raw data average (mean) for all the Hells Gate and Wai Ora Spa valid reviews is 68.42% and is based on 139 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
119 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 139 valid reviews, the experience has 119 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 119 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 10 |
|
8% |
| 9/10 | 13 |
|
11% |
| 8/10 | 30 |
|
25% |
| 7/10 | 28 |
|
24% |
| 6/10 | 11 |
|
9% |
| 5/10 | 12 |
|
10% |
| 4/10 | 3 |
|
3% |
| 3/10 | 7 |
|
6% |
| 2/10 | 4 |
|
3% |
| 1/10 | 1 |
|
1% |
68.99% Average
The raw data average (mean) for all the Hells Gate and Wai Ora Spa face-to-face reviews is 68.99% and is based on 119 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
71.84%
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 |
|---|---|---|---|
| Melissa S | 2/10 | 2283 days | 48% |
| Inez Cavallaro | 6/10 | 2344 days | 100% |
| John Farley | 10/10 | 2945 days | 79% |
| Frank Fabian | 8/10 | 2996 days | 74% |
| Les Hendy | 8/10 | 3022 days | 73% |
| Lea Celerier | 8/10 | 3023 days | 73% |
| Jane Scott | 9/10 | 3073 days | 70% |
| Michelle Smit | 8/10 | 3135 days | 66% |
| Jan Berendsen | 5/10 | 3231 days | 43% |
| Chandra Macraigne | 6/10 | 3266 days | 49% |
| Nanna Torp | 3/10 | 3268 days | 26% |
| Karel | 7/10 | 4005 days | 9% |
| Dick Kooij | 7/10 | 4426 days | 17% |
| Huw Davies | 8/10 | 4694 days | 19% |
| Goran Backlund | 7/10 | 4704 days | 17% |
| Marc Schmiedily | 3/10 | 4705 days | 5% |
| Martin Beuker | 8/10 | 4725 days | 19% |
| Richard Harvey | 8/10 | 4728 days | 19% |
| Mark Bogton | 5/10 | 4728 days | 12% |
| Thomas | 5/10 | 4730 days | 12% |
| Kimberley Mills | 8/10 | 4735 days | 19% |
| Scott Simpson | 5/10 | 4736 days | 12% |
| Luis Valenzuela | 5/10 | 4741 days | 12% |
| Petra | 8/10 | 4743 days | 19% |
| David Blundell | 7/10 | 4743 days | 17% |
| Lucie Rutherfurd | 9/10 | 4746 days | 19% |
| Peter W. | 3/10 | 4810 days | 5% |
| Steve Neilson | 8/10 | 4817 days | 19% |
| Erik Folkersen | 4/10 | 4824 days | 8% |
| Mark de Boer | 8/10 | 4830 days | 19% |
| Tina | 9/10 | 4840 days | 19% |
| Jacquimd13 | 10/10 | 4963 days | 20% |
| Natascha Rachel | 7/10 | 5030 days | 17% |
| A Jones | 9/10 | 5057 days | 19% |
| Walker | 5/10 | 5057 days | 12% |
| Lindsey Clough | 2/10 | 5063 days | 2% |
| Natalie Maguire | 5/10 | 5068 days | 12% |
| Andreas Rath | 6/10 | 5070 days | 15% |
| Peter & Angela Brown | 10/10 | 5075 days | 20% |
| Chris Ashton | 7/10 | 5079 days | 17% |
| Kees Stigter | 7/10 | 5081 days | 17% |
| Diete Rokosch | 9/10 | 5086 days | 19% |
| Brian | 10/10 | 5088 days | 20% |
| Ronald Lippett | 8/10 | 5090 days | 19% |
| Ines | 8/10 | 5100 days | 19% |
| Julian Seizinger | 2/10 | 5100 days | 2% |
| Ann Thompson | 9/10 | 5101 days | 19% |
| Luise Jaeger | 10/10 | 5103 days | 20% |
| Eva Stauderova | 6/10 | 5104 days | 15% |
| Marianne Astorp | 8/10 | 5104 days | 19% |
| Henrik Petersen | 7/10 | 5106 days | 17% |
| Michael Eck | 8/10 | 5106 days | 19% |
| Lili | 8/10 | 5106 days | 19% |
| Florian | 7/10 | 5106 days | 17% |
| willsworthy | 5/10 | 5205 days | 12% |
| craigy | 5/10 | 5297 days | 12% |
| BigSis | 7/10 | 5297 days | 17% |
| Russ Turner | 2/10 | 5436 days | 2% |
| Andy | 6/10 | 5440 days | 15% |
| Michael Egli | 9/10 | 5441 days | 19% |
| Alan & Lorna | 3/10 | 5443 days | 5% |
| Venot | 7/10 | 5453 days | 17% |
| Roger Trusedale | 5/10 | 5460 days | 12% |
| David Rich | 6/10 | 5463 days | 15% |
| Mathias Skov | 4/10 | 5464 days | 8% |
| Nikki Wood | 6/10 | 5472 days | 15% |
| Mike Kirchner | 2/10 | 5474 days | 2% |
| Wolfgang G | 10/10 | 5484 days | 20% |
| Bo Moenstead | 8/10 | 5487 days | 19% |
| cees juffermans | 8/10 | 5491 days | 19% |
| Camenzind | 7/10 | 5498 days | 17% |
| Angela Stringer | 4/10 | 5509 days | 8% |
| blokzyl | 8/10 | 5529 days | 19% |
| aages | 9/10 | 5533 days | 19% |
| Emma Coltman | 5/10 | 5542 days | 12% |
| Helen Pet | 9/10 | 5548 days | 19% |
| nancyburns | 7/10 | 5570 days | 17% |
| Von | 5/10 | 5570 days | 12% |
| rita | 7/10 | 5649 days | 17% |
| Jess Thompson | 10/10 | 5662 days | 20% |
| Boxa Smith | 10/10 | 5662 days | 20% |
| LowerD | 9/10 | 5778 days | 19% |
| Sofie | 8/10 | 5784 days | 19% |
| Arjan Muis | 7/10 | 5786 days | 17% |
| Marion | 10/10 | 5788 days | 20% |
| Kim | 6/10 | 5788 days | 15% |
| MichaelS1 | 3/10 | 5800 days | 5% |
| ClodaghM | 8/10 | 5801 days | 19% |
| Andrew Wilson | 9/10 | 5801 days | 19% |
| FiensG | 8/10 | 5803 days | 19% |
| Joel | 7/10 | 5804 days | 17% |
| Robert | 4/10 | 5807 days | 8% |
| Chris | 8/10 | 5808 days | 19% |
| JuliaG1 | 7/10 | 5817 days | 17% |
| DavidMurray | 7/10 | 5818 days | 17% |
| AndrewF78 | 6/10 | 5820 days | 15% |
| Sarah | 8/10 | 5820 days | 19% |
| Carmel | 7/10 | 5824 days | 17% |
| marcusr | 7/10 | 5825 days | 17% |
| BethanD | 9/10 | 5831 days | 19% |
| ClaudiaK | 1/10 | 5833 days | 0% |
| Miguel | 3/10 | 5834 days | 5% |
| Ko | 8/10 | 5848 days | 19% |
| Nienhaus | 7/10 | 5851 days | 17% |
| Kern | 3/10 | 5868 days | 5% |
| Stephanie | 9/10 | 5884 days | 19% |
| Miha | 10/10 | 5888 days | 20% |
| Jacinta | 3/10 | 5914 days | 5% |
| Lara | 7/10 | 5961 days | 17% |
| Katie | 7/10 | 5979 days | 17% |
| Daniela Bell | 10/10 | 5990 days | 20% |
| Jenny | 7/10 | 5994 days | 17% |
| maria d | 10/10 | 6026 days | 20% |
| fgregory | 3/10 | 6046 days | 5% |
| woodolly | 3/10 | 6127 days | 5% |
| Christian | 6/10 | 6171 days | 15% |
| Alexandra Vogeli | 8/10 | 6171 days | 19% |
| Richard Steward | 9/10 | 6181 days | 19% |
| boukje | 8/10 | 6184 days | 19% |
| Stephanie | 10/10 | 6196 days | 20% |
| Carla | 8/10 | 6196 days | 19% |
| Melissa Steedman | 7/10 | 6223 days | 17% |
| Vanessa Brennan | 5/10 | 6223 days | 12% |
| Maria | 8/10 | 6227 days | 19% |
| Gerber Liselotte | 7/10 | 6258 days | 17% |
| Manuel | 5/10 | 6273 days | 12% |
| Tom Clements | 6/10 | 6274 days | 15% |
| Sally Walker | 9/10 | 6301 days | 19% |
| Bridgy | 10/10 | 6474 days | 20% |
| andrew julie | 8/10 | 6508 days | 19% |
| Bas Marieke | 8/10 | 6525 days | 19% |
| Richhouse | 8/10 | 6530 days | 19% |
| Dennis | 7/10 | 6531 days | 17% |
| Rietveld | 6/10 | 6542 days | 15% |
| Susanne | 5/10 | 6547 days | 12% |
| Lucy | 7/10 | 6547 days | 17% |
| Ralph | 7/10 | 6549 days | 17% |
| Nissa | 7/10 | 6549 days | 17% |
| Ash Sturm | 6/10 | 6666 days | 15% |
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 Hells Gate and Wai Ora Spa experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 49 days. However the Hells Gate and Wai Ora Spa 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 Hells Gate and Wai Ora Spa experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.08% |
| 198 | -4.10% |
| 199 | -4.12% |
| 200 | -4.14% |
| 201 | -4.16% |
| 202 | -4.18% |
| 203 | -4.20% |
| … | … |
Balancing Adjustment
8.38% 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
76%
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.