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 | 2311 days | 48% |
| Inez Cavallaro | 6/10 | 2372 days | 100% |
| John Farley | 10/10 | 2973 days | 79% |
| Frank Fabian | 8/10 | 3024 days | 74% |
| Les Hendy | 8/10 | 3050 days | 72% |
| Lea Celerier | 8/10 | 3051 days | 72% |
| Jane Scott | 9/10 | 3102 days | 69% |
| Michelle Smit | 8/10 | 3164 days | 65% |
| Jan Berendsen | 5/10 | 3259 days | 43% |
| Chandra Macraigne | 6/10 | 3294 days | 48% |
| Nanna Torp | 3/10 | 3296 days | 25% |
| Karel | 7/10 | 4033 days | 8% |
| Dick Kooij | 7/10 | 4454 days | 18% |
| Huw Davies | 8/10 | 4722 days | 19% |
| Goran Backlund | 7/10 | 4732 days | 18% |
| Marc Schmiedily | 3/10 | 4733 days | 5% |
| Martin Beuker | 8/10 | 4753 days | 19% |
| Richard Harvey | 8/10 | 4756 days | 19% |
| Mark Bogton | 5/10 | 4756 days | 12% |
| Thomas | 5/10 | 4758 days | 12% |
| Kimberley Mills | 8/10 | 4763 days | 19% |
| Scott Simpson | 5/10 | 4764 days | 12% |
| Luis Valenzuela | 5/10 | 4769 days | 12% |
| Petra | 8/10 | 4771 days | 19% |
| David Blundell | 7/10 | 4771 days | 18% |
| Lucie Rutherfurd | 9/10 | 4774 days | 20% |
| Peter W. | 3/10 | 4838 days | 5% |
| Steve Neilson | 8/10 | 4845 days | 19% |
| Erik Folkersen | 4/10 | 4852 days | 8% |
| Mark de Boer | 8/10 | 4858 days | 19% |
| Tina | 9/10 | 4868 days | 20% |
| Jacquimd13 | 10/10 | 4991 days | 20% |
| Natascha Rachel | 7/10 | 5058 days | 18% |
| A Jones | 9/10 | 5085 days | 20% |
| Walker | 5/10 | 5085 days | 12% |
| Lindsey Clough | 2/10 | 5091 days | 2% |
| Natalie Maguire | 5/10 | 5096 days | 12% |
| Andreas Rath | 6/10 | 5098 days | 15% |
| Peter & Angela Brown | 10/10 | 5103 days | 20% |
| Chris Ashton | 7/10 | 5107 days | 18% |
| Kees Stigter | 7/10 | 5109 days | 18% |
| Diete Rokosch | 9/10 | 5114 days | 20% |
| Brian | 10/10 | 5116 days | 20% |
| Ronald Lippett | 8/10 | 5118 days | 19% |
| Ines | 8/10 | 5128 days | 19% |
| Julian Seizinger | 2/10 | 5128 days | 2% |
| Ann Thompson | 9/10 | 5129 days | 20% |
| Luise Jaeger | 10/10 | 5131 days | 20% |
| Eva Stauderova | 6/10 | 5132 days | 15% |
| Marianne Astorp | 8/10 | 5132 days | 19% |
| Henrik Petersen | 7/10 | 5134 days | 18% |
| Michael Eck | 8/10 | 5134 days | 19% |
| Lili | 8/10 | 5134 days | 19% |
| Florian | 7/10 | 5134 days | 18% |
| willsworthy | 5/10 | 5233 days | 12% |
| craigy | 5/10 | 5325 days | 12% |
| BigSis | 7/10 | 5325 days | 18% |
| Russ Turner | 2/10 | 5464 days | 2% |
| Andy | 6/10 | 5468 days | 15% |
| Michael Egli | 9/10 | 5469 days | 20% |
| Alan & Lorna | 3/10 | 5471 days | 5% |
| Venot | 7/10 | 5481 days | 18% |
| Roger Trusedale | 5/10 | 5488 days | 12% |
| David Rich | 6/10 | 5491 days | 15% |
| Mathias Skov | 4/10 | 5492 days | 8% |
| Nikki Wood | 6/10 | 5500 days | 15% |
| Mike Kirchner | 2/10 | 5502 days | 2% |
| Wolfgang G | 10/10 | 5512 days | 20% |
| Bo Moenstead | 8/10 | 5515 days | 19% |
| cees juffermans | 8/10 | 5519 days | 19% |
| Camenzind | 7/10 | 5526 days | 18% |
| Angela Stringer | 4/10 | 5537 days | 8% |
| blokzyl | 8/10 | 5557 days | 19% |
| aages | 9/10 | 5561 days | 20% |
| Emma Coltman | 5/10 | 5570 days | 12% |
| Helen Pet | 9/10 | 5576 days | 20% |
| nancyburns | 7/10 | 5598 days | 18% |
| Von | 5/10 | 5598 days | 12% |
| rita | 7/10 | 5677 days | 18% |
| Jess Thompson | 10/10 | 5690 days | 20% |
| Boxa Smith | 10/10 | 5690 days | 20% |
| LowerD | 9/10 | 5806 days | 20% |
| Sofie | 8/10 | 5812 days | 19% |
| Arjan Muis | 7/10 | 5814 days | 18% |
| Marion | 10/10 | 5816 days | 20% |
| Kim | 6/10 | 5816 days | 15% |
| MichaelS1 | 3/10 | 5828 days | 5% |
| ClodaghM | 8/10 | 5829 days | 19% |
| Andrew Wilson | 9/10 | 5829 days | 20% |
| FiensG | 8/10 | 5831 days | 19% |
| Joel | 7/10 | 5832 days | 18% |
| Robert | 4/10 | 5836 days | 8% |
| Chris | 8/10 | 5836 days | 19% |
| JuliaG1 | 7/10 | 5845 days | 18% |
| DavidMurray | 7/10 | 5846 days | 18% |
| AndrewF78 | 6/10 | 5848 days | 15% |
| Sarah | 8/10 | 5848 days | 19% |
| Carmel | 7/10 | 5852 days | 18% |
| marcusr | 7/10 | 5853 days | 18% |
| BethanD | 9/10 | 5859 days | 20% |
| ClaudiaK | 1/10 | 5861 days | 0% |
| Miguel | 3/10 | 5863 days | 5% |
| Ko | 8/10 | 5877 days | 19% |
| Nienhaus | 7/10 | 5879 days | 18% |
| Kern | 3/10 | 5897 days | 5% |
| Stephanie | 9/10 | 5912 days | 20% |
| Miha | 10/10 | 5917 days | 20% |
| Jacinta | 3/10 | 5942 days | 5% |
| Lara | 7/10 | 5990 days | 18% |
| Katie | 7/10 | 6008 days | 18% |
| Daniela Bell | 10/10 | 6019 days | 20% |
| Jenny | 7/10 | 6023 days | 18% |
| maria d | 10/10 | 6054 days | 20% |
| fgregory | 3/10 | 6075 days | 5% |
| woodolly | 3/10 | 6156 days | 5% |
| Christian | 6/10 | 6199 days | 15% |
| Alexandra Vogeli | 8/10 | 6199 days | 19% |
| Richard Steward | 9/10 | 6209 days | 20% |
| boukje | 8/10 | 6212 days | 19% |
| Stephanie | 10/10 | 6224 days | 20% |
| Carla | 8/10 | 6224 days | 19% |
| Melissa Steedman | 7/10 | 6251 days | 18% |
| Vanessa Brennan | 5/10 | 6251 days | 12% |
| Maria | 8/10 | 6255 days | 19% |
| Gerber Liselotte | 7/10 | 6286 days | 18% |
| Manuel | 5/10 | 6301 days | 12% |
| Tom Clements | 6/10 | 6302 days | 15% |
| Sally Walker | 9/10 | 6329 days | 20% |
| Bridgy | 10/10 | 6502 days | 20% |
| andrew julie | 8/10 | 6536 days | 19% |
| Bas Marieke | 8/10 | 6553 days | 19% |
| Richhouse | 8/10 | 6558 days | 19% |
| Dennis | 7/10 | 6559 days | 18% |
| Rietveld | 6/10 | 6570 days | 15% |
| Susanne | 5/10 | 6575 days | 12% |
| Lucy | 7/10 | 6575 days | 18% |
| Ralph | 7/10 | 6577 days | 18% |
| Nissa | 7/10 | 6577 days | 18% |
| Ash Sturm | 6/10 | 6694 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
-4.11% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 55 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 | -4.05% |
| 198 | -4.07% |
| 199 | -4.09% |
| 200 | -4.11% |
| 201 | -4.13% |
| 202 | -4.15% |
| 203 | -4.17% |
| … | … |
Balancing Adjustment
8.36% 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.