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.
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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 | 2347 days | 48% |
| Inez Cavallaro | 6/10 | 2408 days | 100% |
| John Farley | 10/10 | 3009 days | 78% |
| Frank Fabian | 8/10 | 3060 days | 73% |
| Les Hendy | 8/10 | 3086 days | 71% |
| Lea Celerier | 8/10 | 3087 days | 71% |
| Jane Scott | 9/10 | 3137 days | 69% |
| Michelle Smit | 8/10 | 3199 days | 64% |
| Jan Berendsen | 5/10 | 3295 days | 42% |
| Chandra Macraigne | 6/10 | 3330 days | 47% |
| Nanna Torp | 3/10 | 3332 days | 24% |
| Karel | 7/10 | 4069 days | 5% |
| Dick Kooij | 7/10 | 4490 days | 18% |
| Huw Davies | 8/10 | 4758 days | 20% |
| Goran Backlund | 7/10 | 4768 days | 18% |
| Marc Schmiedily | 3/10 | 4769 days | 5% |
| Martin Beuker | 8/10 | 4789 days | 20% |
| Richard Harvey | 8/10 | 4792 days | 20% |
| Mark Bogton | 5/10 | 4792 days | 12% |
| Thomas | 5/10 | 4794 days | 12% |
| Kimberley Mills | 8/10 | 4799 days | 20% |
| Scott Simpson | 5/10 | 4800 days | 12% |
| Luis Valenzuela | 5/10 | 4805 days | 12% |
| Petra | 8/10 | 4807 days | 20% |
| David Blundell | 7/10 | 4807 days | 18% |
| Lucie Rutherfurd | 9/10 | 4810 days | 20% |
| Peter W. | 3/10 | 4874 days | 5% |
| Steve Neilson | 8/10 | 4881 days | 20% |
| Erik Folkersen | 4/10 | 4888 days | 8% |
| Mark de Boer | 8/10 | 4894 days | 20% |
| Tina | 9/10 | 4904 days | 20% |
| Jacquimd13 | 10/10 | 5027 days | 20% |
| Natascha Rachel | 7/10 | 5094 days | 18% |
| A Jones | 9/10 | 5121 days | 20% |
| Walker | 5/10 | 5121 days | 12% |
| Lindsey Clough | 2/10 | 5127 days | 2% |
| Natalie Maguire | 5/10 | 5132 days | 12% |
| Andreas Rath | 6/10 | 5134 days | 16% |
| Peter & Angela Brown | 10/10 | 5139 days | 20% |
| Chris Ashton | 7/10 | 5143 days | 18% |
| Kees Stigter | 7/10 | 5145 days | 18% |
| Diete Rokosch | 9/10 | 5150 days | 20% |
| Brian | 10/10 | 5152 days | 20% |
| Ronald Lippett | 8/10 | 5154 days | 20% |
| Ines | 8/10 | 5164 days | 20% |
| Julian Seizinger | 2/10 | 5164 days | 2% |
| Ann Thompson | 9/10 | 5165 days | 20% |
| Luise Jaeger | 10/10 | 5167 days | 20% |
| Eva Stauderova | 6/10 | 5168 days | 16% |
| Marianne Astorp | 8/10 | 5168 days | 20% |
| Henrik Petersen | 7/10 | 5170 days | 18% |
| Michael Eck | 8/10 | 5170 days | 20% |
| Lili | 8/10 | 5170 days | 20% |
| Florian | 7/10 | 5170 days | 18% |
| willsworthy | 5/10 | 5269 days | 12% |
| craigy | 5/10 | 5361 days | 12% |
| BigSis | 7/10 | 5361 days | 18% |
| Russ Turner | 2/10 | 5500 days | 2% |
| Andy | 6/10 | 5504 days | 16% |
| Michael Egli | 9/10 | 5505 days | 20% |
| Alan & Lorna | 3/10 | 5507 days | 5% |
| Venot | 7/10 | 5517 days | 18% |
| Roger Trusedale | 5/10 | 5524 days | 12% |
| David Rich | 6/10 | 5527 days | 16% |
| Mathias Skov | 4/10 | 5528 days | 8% |
| Nikki Wood | 6/10 | 5536 days | 16% |
| Mike Kirchner | 2/10 | 5538 days | 2% |
| Wolfgang G | 10/10 | 5548 days | 20% |
| Bo Moenstead | 8/10 | 5551 days | 20% |
| cees juffermans | 8/10 | 5555 days | 20% |
| Camenzind | 7/10 | 5562 days | 18% |
| Angela Stringer | 4/10 | 5573 days | 8% |
| blokzyl | 8/10 | 5593 days | 20% |
| aages | 9/10 | 5597 days | 20% |
| Emma Coltman | 5/10 | 5606 days | 12% |
| Helen Pet | 9/10 | 5612 days | 20% |
| nancyburns | 7/10 | 5634 days | 18% |
| Von | 5/10 | 5634 days | 12% |
| rita | 7/10 | 5713 days | 18% |
| Jess Thompson | 10/10 | 5726 days | 20% |
| Boxa Smith | 10/10 | 5726 days | 20% |
| LowerD | 9/10 | 5842 days | 20% |
| Sofie | 8/10 | 5848 days | 20% |
| Arjan Muis | 7/10 | 5850 days | 18% |
| Marion | 10/10 | 5852 days | 20% |
| Kim | 6/10 | 5852 days | 16% |
| MichaelS1 | 3/10 | 5864 days | 5% |
| ClodaghM | 8/10 | 5865 days | 20% |
| Andrew Wilson | 9/10 | 5865 days | 20% |
| FiensG | 8/10 | 5867 days | 20% |
| Joel | 7/10 | 5868 days | 18% |
| Robert | 4/10 | 5871 days | 8% |
| Chris | 8/10 | 5872 days | 20% |
| JuliaG1 | 7/10 | 5881 days | 18% |
| DavidMurray | 7/10 | 5882 days | 18% |
| AndrewF78 | 6/10 | 5884 days | 16% |
| Sarah | 8/10 | 5884 days | 20% |
| Carmel | 7/10 | 5888 days | 18% |
| marcusr | 7/10 | 5889 days | 18% |
| BethanD | 9/10 | 5895 days | 20% |
| ClaudiaK | 1/10 | 5897 days | 0% |
| Miguel | 3/10 | 5898 days | 5% |
| Ko | 8/10 | 5912 days | 20% |
| Nienhaus | 7/10 | 5915 days | 18% |
| Kern | 3/10 | 5932 days | 5% |
| Stephanie | 9/10 | 5948 days | 20% |
| Miha | 10/10 | 5953 days | 20% |
| Jacinta | 3/10 | 5978 days | 5% |
| Lara | 7/10 | 6025 days | 18% |
| Katie | 7/10 | 6043 days | 18% |
| Daniela Bell | 10/10 | 6054 days | 20% |
| Jenny | 7/10 | 6058 days | 18% |
| maria d | 10/10 | 6090 days | 20% |
| fgregory | 3/10 | 6110 days | 5% |
| woodolly | 3/10 | 6191 days | 5% |
| Christian | 6/10 | 6235 days | 16% |
| Alexandra Vogeli | 8/10 | 6235 days | 20% |
| Richard Steward | 9/10 | 6245 days | 20% |
| boukje | 8/10 | 6248 days | 20% |
| Stephanie | 10/10 | 6260 days | 20% |
| Carla | 8/10 | 6260 days | 20% |
| Melissa Steedman | 7/10 | 6287 days | 18% |
| Vanessa Brennan | 5/10 | 6287 days | 12% |
| Maria | 8/10 | 6291 days | 20% |
| Gerber Liselotte | 7/10 | 6322 days | 18% |
| Manuel | 5/10 | 6337 days | 12% |
| Tom Clements | 6/10 | 6338 days | 16% |
| Sally Walker | 9/10 | 6365 days | 20% |
| Bridgy | 10/10 | 6538 days | 20% |
| andrew julie | 8/10 | 6572 days | 20% |
| Bas Marieke | 8/10 | 6589 days | 20% |
| Richhouse | 8/10 | 6594 days | 20% |
| Dennis | 7/10 | 6595 days | 18% |
| Rietveld | 6/10 | 6606 days | 16% |
| Susanne | 5/10 | 6611 days | 12% |
| Lucy | 7/10 | 6611 days | 18% |
| Ralph | 7/10 | 6613 days | 18% |
| Nissa | 7/10 | 6613 days | 18% |
| Ash Sturm | 6/10 | 6730 days | 16% |
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
-3.66% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 61 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 | -3.61% |
| 198 | -3.63% |
| 199 | -3.65% |
| 200 | -3.66% |
| 201 | -3.68% |
| 202 | -3.70% |
| 203 | -3.72% |
| … | … |
Balancing Adjustment
8.08% 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.