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
71.87%
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 | 2628 days | 54% |
| Inez Cavallaro | 6/10 | 2689 days | 100% |
| John Farley | 10/10 | 3290 days | 74% |
| Frank Fabian | 8/10 | 3341 days | 69% |
| Les Hendy | 8/10 | 3367 days | 68% |
| Lea Celerier | 8/10 | 3368 days | 67% |
| Jane Scott | 9/10 | 3418 days | 65% |
| Michelle Smit | 8/10 | 3480 days | 60% |
| Jan Berendsen | 5/10 | 3576 days | 41% |
| Chandra Macraigne | 6/10 | 3611 days | 44% |
| Nanna Torp | 3/10 | 3613 days | 27% |
| Karel | 7/10 | 4350 days | 0% |
| Dick Kooij | 7/10 | 4771 days | 31% |
| Huw Davies | 8/10 | 5039 days | 33% |
| Goran Backlund | 7/10 | 5049 days | 31% |
| Marc Schmiedily | 3/10 | 5050 days | 18% |
| Martin Beuker | 8/10 | 5070 days | 33% |
| Richard Harvey | 8/10 | 5073 days | 33% |
| Mark Bogton | 5/10 | 5073 days | 25% |
| Thomas | 5/10 | 5075 days | 25% |
| Kimberley Mills | 8/10 | 5080 days | 33% |
| Scott Simpson | 5/10 | 5081 days | 25% |
| Luis Valenzuela | 5/10 | 5086 days | 25% |
| Petra | 8/10 | 5088 days | 33% |
| David Blundell | 7/10 | 5088 days | 31% |
| Lucie Rutherfurd | 9/10 | 5091 days | 33% |
| Peter W. | 3/10 | 5155 days | 18% |
| Steve Neilson | 8/10 | 5162 days | 33% |
| Erik Folkersen | 4/10 | 5169 days | 21% |
| Mark de Boer | 8/10 | 5175 days | 33% |
| Tina | 9/10 | 5185 days | 33% |
| Jacquimd13 | 10/10 | 5308 days | 34% |
| Natascha Rachel | 7/10 | 5375 days | 31% |
| A Jones | 9/10 | 5402 days | 33% |
| Walker | 5/10 | 5402 days | 25% |
| Lindsey Clough | 2/10 | 5408 days | 14% |
| Natalie Maguire | 5/10 | 5413 days | 25% |
| Andreas Rath | 6/10 | 5415 days | 29% |
| Peter & Angela Brown | 10/10 | 5420 days | 34% |
| Chris Ashton | 7/10 | 5424 days | 31% |
| Kees Stigter | 7/10 | 5426 days | 31% |
| Diete Rokosch | 9/10 | 5431 days | 33% |
| Brian | 10/10 | 5433 days | 34% |
| Ronald Lippett | 8/10 | 5435 days | 33% |
| Ines | 8/10 | 5445 days | 33% |
| Julian Seizinger | 2/10 | 5445 days | 14% |
| Ann Thompson | 9/10 | 5446 days | 33% |
| Luise Jaeger | 10/10 | 5448 days | 34% |
| Eva Stauderova | 6/10 | 5449 days | 29% |
| Marianne Astorp | 8/10 | 5449 days | 33% |
| Henrik Petersen | 7/10 | 5451 days | 31% |
| Michael Eck | 8/10 | 5451 days | 33% |
| Lili | 8/10 | 5451 days | 33% |
| Florian | 7/10 | 5451 days | 31% |
| willsworthy | 5/10 | 5550 days | 25% |
| craigy | 5/10 | 5642 days | 25% |
| BigSis | 7/10 | 5642 days | 31% |
| Russ Turner | 2/10 | 5781 days | 14% |
| Andy | 6/10 | 5785 days | 29% |
| Michael Egli | 9/10 | 5786 days | 33% |
| Alan & Lorna | 3/10 | 5788 days | 18% |
| Venot | 7/10 | 5798 days | 31% |
| Roger Trusedale | 5/10 | 5805 days | 25% |
| David Rich | 6/10 | 5808 days | 29% |
| Mathias Skov | 4/10 | 5809 days | 21% |
| Nikki Wood | 6/10 | 5817 days | 29% |
| Mike Kirchner | 2/10 | 5819 days | 14% |
| Wolfgang G | 10/10 | 5829 days | 34% |
| Bo Moenstead | 8/10 | 5832 days | 33% |
| cees juffermans | 8/10 | 5836 days | 33% |
| Camenzind | 7/10 | 5843 days | 31% |
| Angela Stringer | 4/10 | 5854 days | 21% |
| blokzyl | 8/10 | 5874 days | 33% |
| aages | 9/10 | 5878 days | 33% |
| Emma Coltman | 5/10 | 5887 days | 25% |
| Helen Pet | 9/10 | 5893 days | 33% |
| nancyburns | 7/10 | 5915 days | 31% |
| Von | 5/10 | 5915 days | 25% |
| rita | 7/10 | 5994 days | 31% |
| Jess Thompson | 10/10 | 6007 days | 34% |
| Boxa Smith | 10/10 | 6007 days | 34% |
| LowerD | 9/10 | 6123 days | 33% |
| Sofie | 8/10 | 6129 days | 33% |
| Arjan Muis | 7/10 | 6131 days | 31% |
| Marion | 10/10 | 6133 days | 34% |
| Kim | 6/10 | 6133 days | 29% |
| MichaelS1 | 3/10 | 6145 days | 18% |
| ClodaghM | 8/10 | 6146 days | 33% |
| Andrew Wilson | 9/10 | 6146 days | 33% |
| FiensG | 8/10 | 6148 days | 33% |
| Joel | 7/10 | 6149 days | 31% |
| Robert | 4/10 | 6152 days | 21% |
| Chris | 8/10 | 6153 days | 33% |
| JuliaG1 | 7/10 | 6162 days | 31% |
| DavidMurray | 7/10 | 6163 days | 31% |
| AndrewF78 | 6/10 | 6165 days | 29% |
| Sarah | 8/10 | 6165 days | 33% |
| Carmel | 7/10 | 6169 days | 31% |
| marcusr | 7/10 | 6170 days | 31% |
| BethanD | 9/10 | 6176 days | 33% |
| ClaudiaK | 1/10 | 6178 days | 13% |
| Miguel | 3/10 | 6179 days | 18% |
| Ko | 8/10 | 6193 days | 33% |
| Nienhaus | 7/10 | 6196 days | 31% |
| Kern | 3/10 | 6213 days | 18% |
| Stephanie | 9/10 | 6229 days | 33% |
| Miha | 10/10 | 6233 days | 34% |
| Jacinta | 3/10 | 6259 days | 18% |
| Lara | 7/10 | 6306 days | 31% |
| Katie | 7/10 | 6324 days | 31% |
| Daniela Bell | 10/10 | 6335 days | 34% |
| Jenny | 7/10 | 6339 days | 31% |
| maria d | 10/10 | 6371 days | 34% |
| fgregory | 3/10 | 6391 days | 18% |
| woodolly | 3/10 | 6472 days | 18% |
| Christian | 6/10 | 6516 days | 29% |
| Alexandra Vogeli | 8/10 | 6516 days | 33% |
| Richard Steward | 9/10 | 6526 days | 33% |
| boukje | 8/10 | 6529 days | 33% |
| Stephanie | 10/10 | 6541 days | 34% |
| Carla | 8/10 | 6541 days | 33% |
| Melissa Steedman | 7/10 | 6568 days | 31% |
| Vanessa Brennan | 5/10 | 6568 days | 25% |
| Maria | 8/10 | 6572 days | 33% |
| Gerber Liselotte | 7/10 | 6603 days | 31% |
| Manuel | 5/10 | 6618 days | 25% |
| Tom Clements | 6/10 | 6619 days | 29% |
| Sally Walker | 9/10 | 6646 days | 33% |
| Bridgy | 10/10 | 6819 days | 34% |
| andrew julie | 8/10 | 6853 days | 33% |
| Bas Marieke | 8/10 | 6870 days | 33% |
| Richhouse | 8/10 | 6875 days | 33% |
| Dennis | 7/10 | 6876 days | 31% |
| Rietveld | 6/10 | 6887 days | 29% |
| Susanne | 5/10 | 6892 days | 25% |
| Lucy | 7/10 | 6892 days | 31% |
| Ralph | 7/10 | 6894 days | 31% |
| Nissa | 7/10 | 6894 days | 31% |
| Ash Sturm | 6/10 | 7011 days | 29% |
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
-4.06% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 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 | -4.00% |
| 198 | -4.02% |
| 199 | -4.04% |
| 200 | -4.06% |
| 201 | -4.08% |
| 202 | -4.10% |
| 203 | -4.12% |
| … | … |
Balancing Adjustment
8.31% 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.