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
71.85%
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 | 2370 days | 48% |
| Inez Cavallaro | 6/10 | 2431 days | 100% |
| John Farley | 10/10 | 3032 days | 78% |
| Frank Fabian | 8/10 | 3083 days | 72% |
| Les Hendy | 8/10 | 3109 days | 71% |
| Lea Celerier | 8/10 | 3110 days | 71% |
| Jane Scott | 9/10 | 3161 days | 68% |
| Michelle Smit | 8/10 | 3223 days | 63% |
| Jan Berendsen | 5/10 | 3318 days | 41% |
| Chandra Macraigne | 6/10 | 3353 days | 46% |
| Nanna Torp | 3/10 | 3355 days | 24% |
| Karel | 7/10 | 4092 days | 4% |
| Dick Kooij | 7/10 | 4513 days | 18% |
| Huw Davies | 8/10 | 4781 days | 20% |
| Goran Backlund | 7/10 | 4791 days | 18% |
| Marc Schmiedily | 3/10 | 4792 days | 5% |
| Martin Beuker | 8/10 | 4812 days | 20% |
| Richard Harvey | 8/10 | 4815 days | 20% |
| Mark Bogton | 5/10 | 4815 days | 12% |
| Thomas | 5/10 | 4817 days | 12% |
| Kimberley Mills | 8/10 | 4822 days | 20% |
| Scott Simpson | 5/10 | 4823 days | 12% |
| Luis Valenzuela | 5/10 | 4828 days | 12% |
| Petra | 8/10 | 4830 days | 20% |
| David Blundell | 7/10 | 4830 days | 18% |
| Lucie Rutherfurd | 9/10 | 4833 days | 20% |
| Peter W. | 3/10 | 4897 days | 5% |
| Steve Neilson | 8/10 | 4904 days | 20% |
| Erik Folkersen | 4/10 | 4911 days | 9% |
| Mark de Boer | 8/10 | 4917 days | 20% |
| Tina | 9/10 | 4927 days | 20% |
| Jacquimd13 | 10/10 | 5050 days | 21% |
| Natascha Rachel | 7/10 | 5117 days | 18% |
| A Jones | 9/10 | 5144 days | 20% |
| Walker | 5/10 | 5144 days | 12% |
| Lindsey Clough | 2/10 | 5150 days | 2% |
| Natalie Maguire | 5/10 | 5155 days | 12% |
| Andreas Rath | 6/10 | 5157 days | 16% |
| Peter & Angela Brown | 10/10 | 5162 days | 21% |
| Chris Ashton | 7/10 | 5166 days | 18% |
| Kees Stigter | 7/10 | 5168 days | 18% |
| Diete Rokosch | 9/10 | 5173 days | 20% |
| Brian | 10/10 | 5175 days | 21% |
| Ronald Lippett | 8/10 | 5177 days | 20% |
| Ines | 8/10 | 5187 days | 20% |
| Julian Seizinger | 2/10 | 5187 days | 2% |
| Ann Thompson | 9/10 | 5188 days | 20% |
| Luise Jaeger | 10/10 | 5190 days | 21% |
| Eva Stauderova | 6/10 | 5191 days | 16% |
| Marianne Astorp | 8/10 | 5191 days | 20% |
| Henrik Petersen | 7/10 | 5193 days | 18% |
| Michael Eck | 8/10 | 5193 days | 20% |
| Lili | 8/10 | 5193 days | 20% |
| Florian | 7/10 | 5193 days | 18% |
| willsworthy | 5/10 | 5292 days | 12% |
| craigy | 5/10 | 5384 days | 12% |
| BigSis | 7/10 | 5384 days | 18% |
| Russ Turner | 2/10 | 5523 days | 2% |
| Andy | 6/10 | 5527 days | 16% |
| Michael Egli | 9/10 | 5528 days | 20% |
| Alan & Lorna | 3/10 | 5530 days | 5% |
| Venot | 7/10 | 5540 days | 18% |
| Roger Trusedale | 5/10 | 5547 days | 12% |
| David Rich | 6/10 | 5550 days | 16% |
| Mathias Skov | 4/10 | 5551 days | 9% |
| Nikki Wood | 6/10 | 5559 days | 16% |
| Mike Kirchner | 2/10 | 5561 days | 2% |
| Wolfgang G | 10/10 | 5571 days | 21% |
| Bo Moenstead | 8/10 | 5574 days | 20% |
| cees juffermans | 8/10 | 5578 days | 20% |
| Camenzind | 7/10 | 5585 days | 18% |
| Angela Stringer | 4/10 | 5596 days | 9% |
| blokzyl | 8/10 | 5616 days | 20% |
| aages | 9/10 | 5620 days | 20% |
| Emma Coltman | 5/10 | 5629 days | 12% |
| Helen Pet | 9/10 | 5635 days | 20% |
| nancyburns | 7/10 | 5657 days | 18% |
| Von | 5/10 | 5657 days | 12% |
| rita | 7/10 | 5736 days | 18% |
| Jess Thompson | 10/10 | 5749 days | 21% |
| Boxa Smith | 10/10 | 5749 days | 21% |
| LowerD | 9/10 | 5865 days | 20% |
| Sofie | 8/10 | 5871 days | 20% |
| Arjan Muis | 7/10 | 5873 days | 18% |
| Marion | 10/10 | 5875 days | 21% |
| Kim | 6/10 | 5875 days | 16% |
| MichaelS1 | 3/10 | 5887 days | 5% |
| ClodaghM | 8/10 | 5888 days | 20% |
| Andrew Wilson | 9/10 | 5888 days | 20% |
| FiensG | 8/10 | 5890 days | 20% |
| Joel | 7/10 | 5891 days | 18% |
| Robert | 4/10 | 5894 days | 9% |
| Chris | 8/10 | 5895 days | 20% |
| JuliaG1 | 7/10 | 5904 days | 18% |
| DavidMurray | 7/10 | 5905 days | 18% |
| AndrewF78 | 6/10 | 5907 days | 16% |
| Sarah | 8/10 | 5907 days | 20% |
| Carmel | 7/10 | 5911 days | 18% |
| marcusr | 7/10 | 5912 days | 18% |
| BethanD | 9/10 | 5918 days | 20% |
| ClaudiaK | 1/10 | 5920 days | 0% |
| Miguel | 3/10 | 5922 days | 5% |
| Ko | 8/10 | 5936 days | 20% |
| Nienhaus | 7/10 | 5938 days | 18% |
| Kern | 3/10 | 5956 days | 5% |
| Stephanie | 9/10 | 5971 days | 20% |
| Miha | 10/10 | 5976 days | 21% |
| Jacinta | 3/10 | 6001 days | 5% |
| Lara | 7/10 | 6048 days | 18% |
| Katie | 7/10 | 6066 days | 18% |
| Daniela Bell | 10/10 | 6077 days | 21% |
| Jenny | 7/10 | 6081 days | 18% |
| maria d | 10/10 | 6113 days | 21% |
| fgregory | 3/10 | 6134 days | 5% |
| woodolly | 3/10 | 6215 days | 5% |
| Christian | 6/10 | 6258 days | 16% |
| Alexandra Vogeli | 8/10 | 6258 days | 20% |
| Richard Steward | 9/10 | 6268 days | 20% |
| boukje | 8/10 | 6271 days | 20% |
| Stephanie | 10/10 | 6283 days | 21% |
| Carla | 8/10 | 6283 days | 20% |
| Melissa Steedman | 7/10 | 6310 days | 18% |
| Vanessa Brennan | 5/10 | 6310 days | 12% |
| Maria | 8/10 | 6314 days | 20% |
| Gerber Liselotte | 7/10 | 6345 days | 18% |
| Manuel | 5/10 | 6360 days | 12% |
| Tom Clements | 6/10 | 6361 days | 16% |
| Sally Walker | 9/10 | 6388 days | 20% |
| Bridgy | 10/10 | 6561 days | 21% |
| andrew julie | 8/10 | 6595 days | 20% |
| Bas Marieke | 8/10 | 6612 days | 20% |
| Richhouse | 8/10 | 6617 days | 20% |
| Dennis | 7/10 | 6618 days | 18% |
| Rietveld | 6/10 | 6629 days | 16% |
| Susanne | 5/10 | 6634 days | 12% |
| Lucy | 7/10 | 6634 days | 18% |
| Ralph | 7/10 | 6636 days | 18% |
| Nissa | 7/10 | 6636 days | 18% |
| Ash Sturm | 6/10 | 6753 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
-3.18% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 75 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 | -3.13% |
| 198 | -3.15% |
| 199 | -3.17% |
| 200 | -3.18% |
| 201 | -3.20% |
| 202 | -3.21% |
| 203 | -3.23% |
| … | … |
Balancing Adjustment
7.78% 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.