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 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
71.87%
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 | 2592 days | 53% |
| Inez Cavallaro | 6/10 | 2653 days | 100% |
| John Farley | 10/10 | 3254 days | 75% |
| Frank Fabian | 8/10 | 3305 days | 70% |
| Les Hendy | 8/10 | 3331 days | 68% |
| Lea Celerier | 8/10 | 3332 days | 68% |
| Jane Scott | 9/10 | 3382 days | 65% |
| Michelle Smit | 8/10 | 3444 days | 60% |
| Jan Berendsen | 5/10 | 3540 days | 41% |
| Chandra Macraigne | 6/10 | 3575 days | 44% |
| Nanna Torp | 3/10 | 3577 days | 26% |
| Karel | 7/10 | 4314 days | 0% |
| Dick Kooij | 7/10 | 4735 days | 29% |
| Huw Davies | 8/10 | 5003 days | 31% |
| Goran Backlund | 7/10 | 5013 days | 29% |
| Marc Schmiedily | 3/10 | 5014 days | 15% |
| Martin Beuker | 8/10 | 5034 days | 31% |
| Richard Harvey | 8/10 | 5037 days | 31% |
| Mark Bogton | 5/10 | 5037 days | 23% |
| Thomas | 5/10 | 5039 days | 23% |
| Kimberley Mills | 8/10 | 5044 days | 31% |
| Scott Simpson | 5/10 | 5045 days | 23% |
| Luis Valenzuela | 5/10 | 5050 days | 23% |
| Petra | 8/10 | 5052 days | 31% |
| David Blundell | 7/10 | 5052 days | 29% |
| Lucie Rutherfurd | 9/10 | 5055 days | 31% |
| Peter W. | 3/10 | 5119 days | 15% |
| Steve Neilson | 8/10 | 5126 days | 31% |
| Erik Folkersen | 4/10 | 5133 days | 19% |
| Mark de Boer | 8/10 | 5139 days | 31% |
| Tina | 9/10 | 5149 days | 31% |
| Jacquimd13 | 10/10 | 5272 days | 32% |
| Natascha Rachel | 7/10 | 5339 days | 29% |
| A Jones | 9/10 | 5366 days | 31% |
| Walker | 5/10 | 5366 days | 23% |
| Lindsey Clough | 2/10 | 5372 days | 12% |
| Natalie Maguire | 5/10 | 5377 days | 23% |
| Andreas Rath | 6/10 | 5379 days | 27% |
| Peter & Angela Brown | 10/10 | 5384 days | 32% |
| Chris Ashton | 7/10 | 5388 days | 29% |
| Kees Stigter | 7/10 | 5390 days | 29% |
| Diete Rokosch | 9/10 | 5395 days | 31% |
| Brian | 10/10 | 5397 days | 32% |
| Ronald Lippett | 8/10 | 5399 days | 31% |
| Ines | 8/10 | 5409 days | 31% |
| Julian Seizinger | 2/10 | 5409 days | 12% |
| Ann Thompson | 9/10 | 5410 days | 31% |
| Luise Jaeger | 10/10 | 5412 days | 32% |
| Eva Stauderova | 6/10 | 5413 days | 27% |
| Marianne Astorp | 8/10 | 5413 days | 31% |
| Henrik Petersen | 7/10 | 5415 days | 29% |
| Michael Eck | 8/10 | 5415 days | 31% |
| Lili | 8/10 | 5415 days | 31% |
| Florian | 7/10 | 5415 days | 29% |
| willsworthy | 5/10 | 5514 days | 23% |
| craigy | 5/10 | 5606 days | 23% |
| BigSis | 7/10 | 5606 days | 29% |
| Russ Turner | 2/10 | 5745 days | 12% |
| Andy | 6/10 | 5749 days | 27% |
| Michael Egli | 9/10 | 5750 days | 31% |
| Alan & Lorna | 3/10 | 5752 days | 15% |
| Venot | 7/10 | 5762 days | 29% |
| Roger Trusedale | 5/10 | 5769 days | 23% |
| David Rich | 6/10 | 5772 days | 27% |
| Mathias Skov | 4/10 | 5773 days | 19% |
| Nikki Wood | 6/10 | 5781 days | 27% |
| Mike Kirchner | 2/10 | 5783 days | 12% |
| Wolfgang G | 10/10 | 5793 days | 32% |
| Bo Moenstead | 8/10 | 5796 days | 31% |
| cees juffermans | 8/10 | 5800 days | 31% |
| Camenzind | 7/10 | 5807 days | 29% |
| Angela Stringer | 4/10 | 5818 days | 19% |
| blokzyl | 8/10 | 5838 days | 31% |
| aages | 9/10 | 5842 days | 31% |
| Emma Coltman | 5/10 | 5851 days | 23% |
| Helen Pet | 9/10 | 5857 days | 31% |
| nancyburns | 7/10 | 5879 days | 29% |
| Von | 5/10 | 5879 days | 23% |
| rita | 7/10 | 5958 days | 29% |
| Jess Thompson | 10/10 | 5971 days | 32% |
| Boxa Smith | 10/10 | 5971 days | 32% |
| LowerD | 9/10 | 6087 days | 31% |
| Sofie | 8/10 | 6093 days | 31% |
| Arjan Muis | 7/10 | 6095 days | 29% |
| Marion | 10/10 | 6097 days | 32% |
| Kim | 6/10 | 6097 days | 27% |
| MichaelS1 | 3/10 | 6109 days | 15% |
| ClodaghM | 8/10 | 6110 days | 31% |
| Andrew Wilson | 9/10 | 6110 days | 31% |
| FiensG | 8/10 | 6112 days | 31% |
| Joel | 7/10 | 6113 days | 29% |
| Robert | 4/10 | 6116 days | 19% |
| Chris | 8/10 | 6117 days | 31% |
| JuliaG1 | 7/10 | 6126 days | 29% |
| DavidMurray | 7/10 | 6127 days | 29% |
| AndrewF78 | 6/10 | 6129 days | 27% |
| Sarah | 8/10 | 6129 days | 31% |
| Carmel | 7/10 | 6133 days | 29% |
| marcusr | 7/10 | 6134 days | 29% |
| BethanD | 9/10 | 6140 days | 31% |
| ClaudiaK | 1/10 | 6142 days | 10% |
| Miguel | 3/10 | 6143 days | 15% |
| Ko | 8/10 | 6157 days | 31% |
| Nienhaus | 7/10 | 6160 days | 29% |
| Kern | 3/10 | 6177 days | 15% |
| Stephanie | 9/10 | 6193 days | 31% |
| Miha | 10/10 | 6197 days | 32% |
| Jacinta | 3/10 | 6223 days | 15% |
| Lara | 7/10 | 6270 days | 29% |
| Katie | 7/10 | 6288 days | 29% |
| Daniela Bell | 10/10 | 6299 days | 32% |
| Jenny | 7/10 | 6303 days | 29% |
| maria d | 10/10 | 6335 days | 32% |
| fgregory | 3/10 | 6355 days | 15% |
| woodolly | 3/10 | 6436 days | 15% |
| Christian | 6/10 | 6480 days | 27% |
| Alexandra Vogeli | 8/10 | 6480 days | 31% |
| Richard Steward | 9/10 | 6490 days | 31% |
| boukje | 8/10 | 6493 days | 31% |
| Stephanie | 10/10 | 6505 days | 32% |
| Carla | 8/10 | 6505 days | 31% |
| Melissa Steedman | 7/10 | 6532 days | 29% |
| Vanessa Brennan | 5/10 | 6532 days | 23% |
| Maria | 8/10 | 6536 days | 31% |
| Gerber Liselotte | 7/10 | 6567 days | 29% |
| Manuel | 5/10 | 6582 days | 23% |
| Tom Clements | 6/10 | 6583 days | 27% |
| Sally Walker | 9/10 | 6610 days | 31% |
| Bridgy | 10/10 | 6783 days | 32% |
| andrew julie | 8/10 | 6817 days | 31% |
| Bas Marieke | 8/10 | 6834 days | 31% |
| Richhouse | 8/10 | 6839 days | 31% |
| Dennis | 7/10 | 6840 days | 29% |
| Rietveld | 6/10 | 6851 days | 27% |
| Susanne | 5/10 | 6856 days | 23% |
| Lucy | 7/10 | 6856 days | 29% |
| Ralph | 7/10 | 6858 days | 29% |
| Nissa | 7/10 | 6858 days | 29% |
| Ash Sturm | 6/10 | 6975 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 Hells Gate and Wai Ora Spa experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
8.32% 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.