Kia ora, 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 | 2594 days | 53% |
| Inez Cavallaro | 6/10 | 2655 days | 100% |
| John Farley | 10/10 | 3256 days | 75% |
| Frank Fabian | 8/10 | 3307 days | 70% |
| Les Hendy | 8/10 | 3333 days | 68% |
| Lea Celerier | 8/10 | 3334 days | 68% |
| Jane Scott | 9/10 | 3384 days | 65% |
| Michelle Smit | 8/10 | 3446 days | 60% |
| Jan Berendsen | 5/10 | 3542 days | 41% |
| Chandra Macraigne | 6/10 | 3577 days | 44% |
| Nanna Torp | 3/10 | 3579 days | 26% |
| Karel | 7/10 | 4316 days | 0% |
| Dick Kooij | 7/10 | 4737 days | 29% |
| Huw Davies | 8/10 | 5005 days | 31% |
| Goran Backlund | 7/10 | 5015 days | 29% |
| Marc Schmiedily | 3/10 | 5016 days | 15% |
| Martin Beuker | 8/10 | 5036 days | 31% |
| Richard Harvey | 8/10 | 5039 days | 31% |
| Mark Bogton | 5/10 | 5039 days | 23% |
| Thomas | 5/10 | 5041 days | 23% |
| Kimberley Mills | 8/10 | 5046 days | 31% |
| Scott Simpson | 5/10 | 5047 days | 23% |
| Luis Valenzuela | 5/10 | 5052 days | 23% |
| Petra | 8/10 | 5054 days | 31% |
| David Blundell | 7/10 | 5054 days | 29% |
| Lucie Rutherfurd | 9/10 | 5057 days | 31% |
| Peter W. | 3/10 | 5121 days | 15% |
| Steve Neilson | 8/10 | 5128 days | 31% |
| Erik Folkersen | 4/10 | 5135 days | 19% |
| Mark de Boer | 8/10 | 5141 days | 31% |
| Tina | 9/10 | 5151 days | 31% |
| Jacquimd13 | 10/10 | 5274 days | 32% |
| Natascha Rachel | 7/10 | 5341 days | 29% |
| A Jones | 9/10 | 5368 days | 31% |
| Walker | 5/10 | 5368 days | 23% |
| Lindsey Clough | 2/10 | 5374 days | 12% |
| Natalie Maguire | 5/10 | 5379 days | 23% |
| Andreas Rath | 6/10 | 5381 days | 27% |
| Peter & Angela Brown | 10/10 | 5386 days | 32% |
| Chris Ashton | 7/10 | 5390 days | 29% |
| Kees Stigter | 7/10 | 5392 days | 29% |
| Diete Rokosch | 9/10 | 5397 days | 31% |
| Brian | 10/10 | 5399 days | 32% |
| Ronald Lippett | 8/10 | 5401 days | 31% |
| Ines | 8/10 | 5411 days | 31% |
| Julian Seizinger | 2/10 | 5411 days | 12% |
| Ann Thompson | 9/10 | 5412 days | 31% |
| Luise Jaeger | 10/10 | 5414 days | 32% |
| Eva Stauderova | 6/10 | 5415 days | 27% |
| Marianne Astorp | 8/10 | 5415 days | 31% |
| Henrik Petersen | 7/10 | 5417 days | 29% |
| Michael Eck | 8/10 | 5417 days | 31% |
| Lili | 8/10 | 5417 days | 31% |
| Florian | 7/10 | 5417 days | 29% |
| willsworthy | 5/10 | 5516 days | 23% |
| craigy | 5/10 | 5608 days | 23% |
| BigSis | 7/10 | 5608 days | 29% |
| Russ Turner | 2/10 | 5747 days | 12% |
| Andy | 6/10 | 5751 days | 27% |
| Michael Egli | 9/10 | 5752 days | 31% |
| Alan & Lorna | 3/10 | 5754 days | 15% |
| Venot | 7/10 | 5764 days | 29% |
| Roger Trusedale | 5/10 | 5771 days | 23% |
| David Rich | 6/10 | 5774 days | 27% |
| Mathias Skov | 4/10 | 5775 days | 19% |
| Nikki Wood | 6/10 | 5783 days | 27% |
| Mike Kirchner | 2/10 | 5785 days | 12% |
| Wolfgang G | 10/10 | 5795 days | 32% |
| Bo Moenstead | 8/10 | 5798 days | 31% |
| cees juffermans | 8/10 | 5802 days | 31% |
| Camenzind | 7/10 | 5809 days | 29% |
| Angela Stringer | 4/10 | 5820 days | 19% |
| blokzyl | 8/10 | 5840 days | 31% |
| aages | 9/10 | 5844 days | 31% |
| Emma Coltman | 5/10 | 5853 days | 23% |
| Helen Pet | 9/10 | 5859 days | 31% |
| nancyburns | 7/10 | 5881 days | 29% |
| Von | 5/10 | 5881 days | 23% |
| rita | 7/10 | 5960 days | 29% |
| Jess Thompson | 10/10 | 5973 days | 32% |
| Boxa Smith | 10/10 | 5973 days | 32% |
| LowerD | 9/10 | 6089 days | 31% |
| Sofie | 8/10 | 6095 days | 31% |
| Arjan Muis | 7/10 | 6097 days | 29% |
| Marion | 10/10 | 6099 days | 32% |
| Kim | 6/10 | 6099 days | 27% |
| MichaelS1 | 3/10 | 6111 days | 15% |
| ClodaghM | 8/10 | 6112 days | 31% |
| Andrew Wilson | 9/10 | 6112 days | 31% |
| FiensG | 8/10 | 6114 days | 31% |
| Joel | 7/10 | 6115 days | 29% |
| Robert | 4/10 | 6118 days | 19% |
| Chris | 8/10 | 6119 days | 31% |
| JuliaG1 | 7/10 | 6128 days | 29% |
| DavidMurray | 7/10 | 6129 days | 29% |
| AndrewF78 | 6/10 | 6131 days | 27% |
| Sarah | 8/10 | 6131 days | 31% |
| Carmel | 7/10 | 6135 days | 29% |
| marcusr | 7/10 | 6136 days | 29% |
| BethanD | 9/10 | 6142 days | 31% |
| ClaudiaK | 1/10 | 6144 days | 10% |
| Miguel | 3/10 | 6145 days | 15% |
| Ko | 8/10 | 6159 days | 31% |
| Nienhaus | 7/10 | 6162 days | 29% |
| Kern | 3/10 | 6179 days | 15% |
| Stephanie | 9/10 | 6195 days | 31% |
| Miha | 10/10 | 6200 days | 32% |
| Jacinta | 3/10 | 6225 days | 15% |
| Lara | 7/10 | 6272 days | 29% |
| Katie | 7/10 | 6290 days | 29% |
| Daniela Bell | 10/10 | 6301 days | 32% |
| Jenny | 7/10 | 6305 days | 29% |
| maria d | 10/10 | 6337 days | 32% |
| fgregory | 3/10 | 6357 days | 15% |
| woodolly | 3/10 | 6438 days | 15% |
| Christian | 6/10 | 6482 days | 27% |
| Alexandra Vogeli | 8/10 | 6482 days | 31% |
| Richard Steward | 9/10 | 6492 days | 31% |
| boukje | 8/10 | 6495 days | 31% |
| Stephanie | 10/10 | 6507 days | 32% |
| Carla | 8/10 | 6507 days | 31% |
| Melissa Steedman | 7/10 | 6534 days | 29% |
| Vanessa Brennan | 5/10 | 6534 days | 23% |
| Maria | 8/10 | 6538 days | 31% |
| Gerber Liselotte | 7/10 | 6569 days | 29% |
| Manuel | 5/10 | 6584 days | 23% |
| Tom Clements | 6/10 | 6585 days | 27% |
| Sally Walker | 9/10 | 6612 days | 31% |
| Bridgy | 10/10 | 6785 days | 32% |
| andrew julie | 8/10 | 6819 days | 31% |
| Bas Marieke | 8/10 | 6836 days | 31% |
| Richhouse | 8/10 | 6841 days | 31% |
| Dennis | 7/10 | 6842 days | 29% |
| Rietveld | 6/10 | 6853 days | 27% |
| Susanne | 5/10 | 6858 days | 23% |
| Lucy | 7/10 | 6858 days | 29% |
| Ralph | 7/10 | 6860 days | 29% |
| Nissa | 7/10 | 6860 days | 29% |
| Ash Sturm | 6/10 | 6977 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.