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 | 2600 days | 53% |
| Inez Cavallaro | 6/10 | 2661 days | 100% |
| John Farley | 10/10 | 3262 days | 75% |
| Frank Fabian | 8/10 | 3313 days | 70% |
| Les Hendy | 8/10 | 3339 days | 68% |
| Lea Celerier | 8/10 | 3340 days | 68% |
| Jane Scott | 9/10 | 3391 days | 65% |
| Michelle Smit | 8/10 | 3453 days | 60% |
| Jan Berendsen | 5/10 | 3548 days | 41% |
| Chandra Macraigne | 6/10 | 3583 days | 44% |
| Nanna Torp | 3/10 | 3585 days | 27% |
| Karel | 7/10 | 4322 days | 0% |
| Dick Kooij | 7/10 | 4743 days | 30% |
| Huw Davies | 8/10 | 5011 days | 31% |
| Goran Backlund | 7/10 | 5021 days | 30% |
| Marc Schmiedily | 3/10 | 5022 days | 16% |
| Martin Beuker | 8/10 | 5042 days | 31% |
| Richard Harvey | 8/10 | 5045 days | 31% |
| Mark Bogton | 5/10 | 5045 days | 24% |
| Thomas | 5/10 | 5047 days | 24% |
| Kimberley Mills | 8/10 | 5052 days | 31% |
| Scott Simpson | 5/10 | 5053 days | 24% |
| Luis Valenzuela | 5/10 | 5058 days | 24% |
| Petra | 8/10 | 5060 days | 31% |
| David Blundell | 7/10 | 5060 days | 30% |
| Lucie Rutherfurd | 9/10 | 5063 days | 32% |
| Peter W. | 3/10 | 5127 days | 16% |
| Steve Neilson | 8/10 | 5134 days | 31% |
| Erik Folkersen | 4/10 | 5141 days | 20% |
| Mark de Boer | 8/10 | 5147 days | 31% |
| Tina | 9/10 | 5157 days | 32% |
| Jacquimd13 | 10/10 | 5280 days | 32% |
| Natascha Rachel | 7/10 | 5347 days | 30% |
| A Jones | 9/10 | 5374 days | 32% |
| Walker | 5/10 | 5374 days | 24% |
| Lindsey Clough | 2/10 | 5380 days | 13% |
| Natalie Maguire | 5/10 | 5385 days | 24% |
| Andreas Rath | 6/10 | 5387 days | 27% |
| Peter & Angela Brown | 10/10 | 5392 days | 32% |
| Chris Ashton | 7/10 | 5396 days | 30% |
| Kees Stigter | 7/10 | 5398 days | 30% |
| Diete Rokosch | 9/10 | 5403 days | 32% |
| Brian | 10/10 | 5405 days | 32% |
| Ronald Lippett | 8/10 | 5407 days | 31% |
| Ines | 8/10 | 5417 days | 31% |
| Julian Seizinger | 2/10 | 5417 days | 13% |
| Ann Thompson | 9/10 | 5418 days | 32% |
| Luise Jaeger | 10/10 | 5420 days | 32% |
| Eva Stauderova | 6/10 | 5421 days | 27% |
| Marianne Astorp | 8/10 | 5421 days | 31% |
| Henrik Petersen | 7/10 | 5423 days | 30% |
| Michael Eck | 8/10 | 5423 days | 31% |
| Lili | 8/10 | 5423 days | 31% |
| Florian | 7/10 | 5423 days | 30% |
| willsworthy | 5/10 | 5522 days | 24% |
| craigy | 5/10 | 5614 days | 24% |
| BigSis | 7/10 | 5614 days | 30% |
| Russ Turner | 2/10 | 5753 days | 13% |
| Andy | 6/10 | 5757 days | 27% |
| Michael Egli | 9/10 | 5758 days | 32% |
| Alan & Lorna | 3/10 | 5760 days | 16% |
| Venot | 7/10 | 5770 days | 30% |
| Roger Trusedale | 5/10 | 5777 days | 24% |
| David Rich | 6/10 | 5780 days | 27% |
| Mathias Skov | 4/10 | 5781 days | 20% |
| Nikki Wood | 6/10 | 5789 days | 27% |
| Mike Kirchner | 2/10 | 5791 days | 13% |
| Wolfgang G | 10/10 | 5801 days | 32% |
| Bo Moenstead | 8/10 | 5804 days | 31% |
| cees juffermans | 8/10 | 5808 days | 31% |
| Camenzind | 7/10 | 5815 days | 30% |
| Angela Stringer | 4/10 | 5826 days | 20% |
| blokzyl | 8/10 | 5846 days | 31% |
| aages | 9/10 | 5850 days | 32% |
| Emma Coltman | 5/10 | 5859 days | 24% |
| Helen Pet | 9/10 | 5865 days | 32% |
| nancyburns | 7/10 | 5887 days | 30% |
| Von | 5/10 | 5887 days | 24% |
| rita | 7/10 | 5966 days | 30% |
| Jess Thompson | 10/10 | 5979 days | 32% |
| Boxa Smith | 10/10 | 5979 days | 32% |
| LowerD | 9/10 | 6095 days | 32% |
| Sofie | 8/10 | 6101 days | 31% |
| Arjan Muis | 7/10 | 6103 days | 30% |
| Marion | 10/10 | 6105 days | 32% |
| Kim | 6/10 | 6105 days | 27% |
| MichaelS1 | 3/10 | 6117 days | 16% |
| ClodaghM | 8/10 | 6118 days | 31% |
| Andrew Wilson | 9/10 | 6118 days | 32% |
| FiensG | 8/10 | 6120 days | 31% |
| Joel | 7/10 | 6121 days | 30% |
| Robert | 4/10 | 6124 days | 20% |
| Chris | 8/10 | 6125 days | 31% |
| JuliaG1 | 7/10 | 6134 days | 30% |
| DavidMurray | 7/10 | 6135 days | 30% |
| AndrewF78 | 6/10 | 6137 days | 27% |
| Sarah | 8/10 | 6137 days | 31% |
| Carmel | 7/10 | 6141 days | 30% |
| marcusr | 7/10 | 6142 days | 30% |
| BethanD | 9/10 | 6148 days | 32% |
| ClaudiaK | 1/10 | 6150 days | 11% |
| Miguel | 3/10 | 6151 days | 16% |
| Ko | 8/10 | 6166 days | 31% |
| Nienhaus | 7/10 | 6168 days | 30% |
| Kern | 3/10 | 6185 days | 16% |
| Stephanie | 9/10 | 6201 days | 32% |
| Miha | 10/10 | 6206 days | 32% |
| Jacinta | 3/10 | 6231 days | 16% |
| Lara | 7/10 | 6278 days | 30% |
| Katie | 7/10 | 6296 days | 30% |
| Daniela Bell | 10/10 | 6307 days | 32% |
| Jenny | 7/10 | 6311 days | 30% |
| maria d | 10/10 | 6343 days | 32% |
| fgregory | 3/10 | 6363 days | 16% |
| woodolly | 3/10 | 6444 days | 16% |
| Christian | 6/10 | 6488 days | 27% |
| Alexandra Vogeli | 8/10 | 6488 days | 31% |
| Richard Steward | 9/10 | 6498 days | 32% |
| boukje | 8/10 | 6501 days | 31% |
| Stephanie | 10/10 | 6513 days | 32% |
| Carla | 8/10 | 6513 days | 31% |
| Melissa Steedman | 7/10 | 6540 days | 30% |
| Vanessa Brennan | 5/10 | 6540 days | 24% |
| Maria | 8/10 | 6544 days | 31% |
| Gerber Liselotte | 7/10 | 6575 days | 30% |
| Manuel | 5/10 | 6590 days | 24% |
| Tom Clements | 6/10 | 6591 days | 27% |
| Sally Walker | 9/10 | 6618 days | 32% |
| Bridgy | 10/10 | 6791 days | 32% |
| andrew julie | 8/10 | 6825 days | 31% |
| Bas Marieke | 8/10 | 6842 days | 31% |
| Richhouse | 8/10 | 6847 days | 31% |
| Dennis | 7/10 | 6848 days | 30% |
| Rietveld | 6/10 | 6859 days | 27% |
| Susanne | 5/10 | 6864 days | 24% |
| Lucy | 7/10 | 6864 days | 30% |
| Ralph | 7/10 | 6866 days | 30% |
| Nissa | 7/10 | 6866 days | 30% |
| Ash Sturm | 6/10 | 6983 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
-4.06% 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 | -4.00% |
| 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.