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
71.84%
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 | 2191 days | 53% |
| Inez Cavallaro | 6/10 | 2251 days | 100% |
| John Farley | 10/10 | 2853 days | 83% |
| Frank Fabian | 8/10 | 2904 days | 78% |
| Les Hendy | 8/10 | 2930 days | 77% |
| Lea Celerier | 8/10 | 2931 days | 77% |
| Jane Scott | 9/10 | 2981 days | 75% |
| Michelle Smit | 8/10 | 3043 days | 71% |
| Jan Berendsen | 5/10 | 3139 days | 50% |
| Chandra Macraigne | 6/10 | 3174 days | 56% |
| Nanna Torp | 3/10 | 3176 days | 34% |
| Karel | 7/10 | 3913 days | 22% |
| Dick Kooij | 7/10 | 4334 days | 0% |
| Huw Davies | 8/10 | 4602 days | 26% |
| Goran Backlund | 7/10 | 4612 days | 24% |
| Marc Schmiedily | 3/10 | 4613 days | 13% |
| Martin Beuker | 8/10 | 4633 days | 26% |
| Richard Harvey | 8/10 | 4636 days | 26% |
| Mark Bogton | 5/10 | 4636 days | 19% |
| Thomas | 5/10 | 4638 days | 19% |
| Kimberley Mills | 8/10 | 4643 days | 26% |
| Scott Simpson | 5/10 | 4644 days | 19% |
| Luis Valenzuela | 5/10 | 4649 days | 19% |
| Petra | 8/10 | 4651 days | 26% |
| David Blundell | 7/10 | 4651 days | 24% |
| Lucie Rutherfurd | 9/10 | 4654 days | 26% |
| Peter W. | 3/10 | 4718 days | 13% |
| Steve Neilson | 8/10 | 4725 days | 26% |
| Erik Folkersen | 4/10 | 4732 days | 16% |
| Mark de Boer | 8/10 | 4738 days | 26% |
| Tina | 9/10 | 4748 days | 26% |
| Jacquimd13 | 10/10 | 4870 days | 26% |
| Natascha Rachel | 7/10 | 4937 days | 24% |
| A Jones | 9/10 | 4965 days | 26% |
| Walker | 5/10 | 4965 days | 19% |
| Lindsey Clough | 2/10 | 4971 days | 11% |
| Natalie Maguire | 5/10 | 4976 days | 19% |
| Andreas Rath | 6/10 | 4978 days | 22% |
| Peter & Angela Brown | 10/10 | 4983 days | 26% |
| Chris Ashton | 7/10 | 4987 days | 24% |
| Kees Stigter | 7/10 | 4989 days | 24% |
| Diete Rokosch | 9/10 | 4994 days | 26% |
| Brian | 10/10 | 4996 days | 26% |
| Ronald Lippett | 8/10 | 4998 days | 26% |
| Ines | 8/10 | 5008 days | 26% |
| Julian Seizinger | 2/10 | 5008 days | 11% |
| Ann Thompson | 9/10 | 5009 days | 26% |
| Luise Jaeger | 10/10 | 5011 days | 26% |
| Eva Stauderova | 6/10 | 5012 days | 22% |
| Marianne Astorp | 8/10 | 5012 days | 26% |
| Henrik Petersen | 7/10 | 5014 days | 24% |
| Michael Eck | 8/10 | 5014 days | 26% |
| Lili | 8/10 | 5014 days | 26% |
| Florian | 7/10 | 5014 days | 24% |
| willsworthy | 5/10 | 5113 days | 19% |
| craigy | 5/10 | 5204 days | 19% |
| BigSis | 7/10 | 5204 days | 24% |
| Russ Turner | 2/10 | 5344 days | 11% |
| Andy | 6/10 | 5348 days | 22% |
| Michael Egli | 9/10 | 5349 days | 26% |
| Alan & Lorna | 3/10 | 5351 days | 13% |
| Venot | 7/10 | 5361 days | 24% |
| Roger Trusedale | 5/10 | 5368 days | 19% |
| David Rich | 6/10 | 5371 days | 22% |
| Mathias Skov | 4/10 | 5372 days | 16% |
| Nikki Wood | 6/10 | 5380 days | 22% |
| Mike Kirchner | 2/10 | 5382 days | 11% |
| Wolfgang G | 10/10 | 5392 days | 26% |
| Bo Moenstead | 8/10 | 5395 days | 26% |
| cees juffermans | 8/10 | 5399 days | 26% |
| Camenzind | 7/10 | 5406 days | 24% |
| Angela Stringer | 4/10 | 5417 days | 16% |
| blokzyl | 8/10 | 5437 days | 26% |
| aages | 9/10 | 5441 days | 26% |
| Emma Coltman | 5/10 | 5450 days | 19% |
| Helen Pet | 9/10 | 5456 days | 26% |
| nancyburns | 7/10 | 5478 days | 24% |
| Von | 5/10 | 5478 days | 19% |
| rita | 7/10 | 5556 days | 24% |
| Jess Thompson | 10/10 | 5569 days | 26% |
| Boxa Smith | 10/10 | 5569 days | 26% |
| LowerD | 9/10 | 5685 days | 26% |
| Sofie | 8/10 | 5692 days | 26% |
| Arjan Muis | 7/10 | 5694 days | 24% |
| Marion | 10/10 | 5696 days | 26% |
| Kim | 6/10 | 5696 days | 22% |
| MichaelS1 | 3/10 | 5708 days | 13% |
| ClodaghM | 8/10 | 5709 days | 26% |
| Andrew Wilson | 9/10 | 5709 days | 26% |
| FiensG | 8/10 | 5711 days | 26% |
| Joel | 7/10 | 5712 days | 24% |
| Robert | 4/10 | 5715 days | 16% |
| Chris | 8/10 | 5716 days | 26% |
| JuliaG1 | 7/10 | 5725 days | 24% |
| DavidMurray | 7/10 | 5726 days | 24% |
| AndrewF78 | 6/10 | 5728 days | 22% |
| Sarah | 8/10 | 5728 days | 26% |
| Carmel | 7/10 | 5732 days | 24% |
| marcusr | 7/10 | 5733 days | 24% |
| BethanD | 9/10 | 5739 days | 26% |
| ClaudiaK | 1/10 | 5741 days | 9% |
| Miguel | 3/10 | 5742 days | 13% |
| Ko | 8/10 | 5756 days | 26% |
| Nienhaus | 7/10 | 5759 days | 24% |
| Kern | 3/10 | 5776 days | 13% |
| Stephanie | 9/10 | 5792 days | 26% |
| Miha | 10/10 | 5796 days | 26% |
| Jacinta | 3/10 | 5822 days | 13% |
| Lara | 7/10 | 5869 days | 24% |
| Katie | 7/10 | 5887 days | 24% |
| Daniela Bell | 10/10 | 5898 days | 26% |
| Jenny | 7/10 | 5902 days | 24% |
| maria d | 10/10 | 5934 days | 26% |
| fgregory | 3/10 | 5954 days | 13% |
| woodolly | 3/10 | 6035 days | 13% |
| Christian | 6/10 | 6079 days | 22% |
| Alexandra Vogeli | 8/10 | 6079 days | 26% |
| Richard Steward | 9/10 | 6089 days | 26% |
| boukje | 8/10 | 6092 days | 26% |
| Stephanie | 10/10 | 6104 days | 26% |
| Carla | 8/10 | 6104 days | 26% |
| Melissa Steedman | 7/10 | 6131 days | 24% |
| Vanessa Brennan | 5/10 | 6131 days | 19% |
| Maria | 8/10 | 6135 days | 26% |
| Gerber Liselotte | 7/10 | 6166 days | 24% |
| Manuel | 5/10 | 6181 days | 19% |
| Tom Clements | 6/10 | 6182 days | 22% |
| Sally Walker | 9/10 | 6209 days | 26% |
| Bridgy | 10/10 | 6381 days | 26% |
| andrew julie | 8/10 | 6415 days | 26% |
| Bas Marieke | 8/10 | 6432 days | 26% |
| Richhouse | 8/10 | 6438 days | 26% |
| Dennis | 7/10 | 6439 days | 24% |
| Rietveld | 6/10 | 6450 days | 22% |
| Susanne | 5/10 | 6455 days | 19% |
| Lucy | 7/10 | 6455 days | 24% |
| Ralph | 7/10 | 6457 days | 24% |
| Nissa | 7/10 | 6457 days | 24% |
| Ash Sturm | 6/10 | 6574 days | 22% |
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
-3.85% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 50 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 | -3.80% |
| 198 | -3.82% |
| 199 | -3.83% |
| 200 | -3.85% |
| 201 | -3.87% |
| 202 | -3.89% |
| 203 | -3.91% |
| … | … |
Balancing Adjustment
8.19% 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.