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
71.86%
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 | 2659 days | 47% |
| Inez Cavallaro | 6/10 | 2720 days | 100% |
| John Farley | 10/10 | 3321 days | 70% |
| Frank Fabian | 8/10 | 3372 days | 64% |
| Les Hendy | 8/10 | 3398 days | 62% |
| Lea Celerier | 8/10 | 3399 days | 62% |
| Jane Scott | 9/10 | 3450 days | 58% |
| Michelle Smit | 8/10 | 3512 days | 53% |
| Jan Berendsen | 5/10 | 3607 days | 31% |
| Chandra Macraigne | 6/10 | 3642 days | 35% |
| Nanna Torp | 3/10 | 3644 days | 16% |
| Karel | 7/10 | 4381 days | 22% |
| Dick Kooij | 7/10 | 4802 days | 22% |
| Huw Davies | 8/10 | 5070 days | 24% |
| Goran Backlund | 7/10 | 5080 days | 22% |
| Marc Schmiedily | 3/10 | 5081 days | 6% |
| Martin Beuker | 8/10 | 5101 days | 24% |
| Richard Harvey | 8/10 | 5104 days | 24% |
| Mark Bogton | 5/10 | 5104 days | 15% |
| Thomas | 5/10 | 5106 days | 15% |
| Kimberley Mills | 8/10 | 5111 days | 24% |
| Scott Simpson | 5/10 | 5112 days | 15% |
| Luis Valenzuela | 5/10 | 5117 days | 15% |
| Petra | 8/10 | 5119 days | 24% |
| David Blundell | 7/10 | 5119 days | 22% |
| Lucie Rutherfurd | 9/10 | 5122 days | 24% |
| Peter W. | 3/10 | 5186 days | 6% |
| Steve Neilson | 8/10 | 5193 days | 24% |
| Erik Folkersen | 4/10 | 5200 days | 10% |
| Mark de Boer | 8/10 | 5206 days | 24% |
| Tina | 9/10 | 5216 days | 24% |
| Jacquimd13 | 10/10 | 5339 days | 25% |
| Natascha Rachel | 7/10 | 5406 days | 22% |
| A Jones | 9/10 | 5433 days | 24% |
| Walker | 5/10 | 5433 days | 15% |
| Lindsey Clough | 2/10 | 5439 days | 2% |
| Natalie Maguire | 5/10 | 5444 days | 15% |
| Andreas Rath | 6/10 | 5446 days | 19% |
| Peter & Angela Brown | 10/10 | 5451 days | 25% |
| Chris Ashton | 7/10 | 5455 days | 22% |
| Kees Stigter | 7/10 | 5457 days | 22% |
| Diete Rokosch | 9/10 | 5462 days | 24% |
| Brian | 10/10 | 5464 days | 25% |
| Ronald Lippett | 8/10 | 5466 days | 24% |
| Ines | 8/10 | 5476 days | 24% |
| Julian Seizinger | 2/10 | 5476 days | 2% |
| Ann Thompson | 9/10 | 5477 days | 24% |
| Luise Jaeger | 10/10 | 5479 days | 25% |
| Eva Stauderova | 6/10 | 5480 days | 19% |
| Marianne Astorp | 8/10 | 5480 days | 24% |
| Henrik Petersen | 7/10 | 5482 days | 22% |
| Michael Eck | 8/10 | 5482 days | 24% |
| Lili | 8/10 | 5482 days | 24% |
| Florian | 7/10 | 5482 days | 22% |
| willsworthy | 5/10 | 5581 days | 15% |
| craigy | 5/10 | 5673 days | 15% |
| BigSis | 7/10 | 5673 days | 22% |
| Russ Turner | 2/10 | 5812 days | 2% |
| Andy | 6/10 | 5816 days | 19% |
| Michael Egli | 9/10 | 5817 days | 24% |
| Alan & Lorna | 3/10 | 5819 days | 6% |
| Venot | 7/10 | 5829 days | 22% |
| Roger Trusedale | 5/10 | 5836 days | 15% |
| David Rich | 6/10 | 5839 days | 19% |
| Mathias Skov | 4/10 | 5840 days | 10% |
| Nikki Wood | 6/10 | 5848 days | 19% |
| Mike Kirchner | 2/10 | 5850 days | 2% |
| Wolfgang G | 10/10 | 5860 days | 25% |
| Bo Moenstead | 8/10 | 5863 days | 24% |
| cees juffermans | 8/10 | 5867 days | 24% |
| Camenzind | 7/10 | 5874 days | 22% |
| Angela Stringer | 4/10 | 5885 days | 10% |
| blokzyl | 8/10 | 5905 days | 24% |
| aages | 9/10 | 5909 days | 24% |
| Emma Coltman | 5/10 | 5918 days | 15% |
| Helen Pet | 9/10 | 5924 days | 24% |
| nancyburns | 7/10 | 5946 days | 22% |
| Von | 5/10 | 5946 days | 15% |
| rita | 7/10 | 6025 days | 22% |
| Jess Thompson | 10/10 | 6038 days | 25% |
| Boxa Smith | 10/10 | 6038 days | 25% |
| LowerD | 9/10 | 6154 days | 24% |
| Sofie | 8/10 | 6160 days | 24% |
| Arjan Muis | 7/10 | 6162 days | 22% |
| Marion | 10/10 | 6165 days | 25% |
| Kim | 6/10 | 6165 days | 19% |
| MichaelS1 | 3/10 | 6176 days | 6% |
| ClodaghM | 8/10 | 6177 days | 24% |
| Andrew Wilson | 9/10 | 6177 days | 24% |
| FiensG | 8/10 | 6179 days | 24% |
| Joel | 7/10 | 6180 days | 22% |
| Robert | 4/10 | 6184 days | 10% |
| Chris | 8/10 | 6185 days | 24% |
| JuliaG1 | 7/10 | 6193 days | 22% |
| DavidMurray | 7/10 | 6194 days | 22% |
| AndrewF78 | 6/10 | 6196 days | 19% |
| Sarah | 8/10 | 6197 days | 24% |
| Carmel | 7/10 | 6201 days | 22% |
| marcusr | 7/10 | 6202 days | 22% |
| BethanD | 9/10 | 6207 days | 24% |
| ClaudiaK | 1/10 | 6209 days | 0% |
| Miguel | 3/10 | 6211 days | 6% |
| Ko | 8/10 | 6225 days | 24% |
| Nienhaus | 7/10 | 6228 days | 22% |
| Kern | 3/10 | 6245 days | 6% |
| Stephanie | 9/10 | 6260 days | 24% |
| Miha | 10/10 | 6265 days | 25% |
| Jacinta | 3/10 | 6291 days | 6% |
| Lara | 7/10 | 6338 days | 22% |
| Katie | 7/10 | 6356 days | 22% |
| Daniela Bell | 10/10 | 6367 days | 25% |
| Jenny | 7/10 | 6371 days | 22% |
| maria d | 10/10 | 6403 days | 25% |
| fgregory | 3/10 | 6423 days | 6% |
| woodolly | 3/10 | 6504 days | 6% |
| Christian | 6/10 | 6547 days | 19% |
| Alexandra Vogeli | 8/10 | 6547 days | 24% |
| Richard Steward | 9/10 | 6557 days | 24% |
| boukje | 8/10 | 6561 days | 24% |
| Stephanie | 10/10 | 6572 days | 25% |
| Carla | 8/10 | 6572 days | 24% |
| Melissa Steedman | 7/10 | 6599 days | 22% |
| Vanessa Brennan | 5/10 | 6599 days | 15% |
| Maria | 8/10 | 6603 days | 24% |
| Gerber Liselotte | 7/10 | 6634 days | 22% |
| Manuel | 5/10 | 6649 days | 15% |
| Tom Clements | 6/10 | 6650 days | 19% |
| Sally Walker | 9/10 | 6677 days | 24% |
| Bridgy | 10/10 | 6850 days | 25% |
| andrew julie | 8/10 | 6884 days | 24% |
| Bas Marieke | 8/10 | 6901 days | 24% |
| Richhouse | 8/10 | 6906 days | 24% |
| Dennis | 7/10 | 6907 days | 22% |
| Rietveld | 6/10 | 6918 days | 19% |
| Susanne | 5/10 | 6923 days | 15% |
| Lucy | 7/10 | 6923 days | 22% |
| Ralph | 7/10 | 6925 days | 22% |
| Nissa | 7/10 | 6925 days | 22% |
| Ash Sturm | 6/10 | 7042 days | 19% |
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
-4.15% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 51 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 | -4.09% |
| 198 | -4.11% |
| 199 | -4.13% |
| 200 | -4.15% |
| 201 | -4.18% |
| 202 | -4.20% |
| 203 | -4.22% |
| … | … |
Balancing Adjustment
8.38% 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.