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
71.84%
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 | 2298 days | 48% |
| Inez Cavallaro | 6/10 | 2359 days | 100% |
| John Farley | 10/10 | 2960 days | 79% |
| Frank Fabian | 8/10 | 3011 days | 74% |
| Les Hendy | 8/10 | 3037 days | 72% |
| Lea Celerier | 8/10 | 3038 days | 72% |
| Jane Scott | 9/10 | 3089 days | 70% |
| Michelle Smit | 8/10 | 3151 days | 65% |
| Jan Berendsen | 5/10 | 3246 days | 43% |
| Chandra Macraigne | 6/10 | 3281 days | 48% |
| Nanna Torp | 3/10 | 3283 days | 25% |
| Karel | 7/10 | 4020 days | 8% |
| Dick Kooij | 7/10 | 4441 days | 17% |
| Huw Davies | 8/10 | 4709 days | 19% |
| Goran Backlund | 7/10 | 4719 days | 17% |
| Marc Schmiedily | 3/10 | 4720 days | 5% |
| Martin Beuker | 8/10 | 4740 days | 19% |
| Richard Harvey | 8/10 | 4743 days | 19% |
| Mark Bogton | 5/10 | 4743 days | 12% |
| Thomas | 5/10 | 4745 days | 12% |
| Kimberley Mills | 8/10 | 4750 days | 19% |
| Scott Simpson | 5/10 | 4751 days | 12% |
| Luis Valenzuela | 5/10 | 4756 days | 12% |
| Petra | 8/10 | 4758 days | 19% |
| David Blundell | 7/10 | 4758 days | 17% |
| Lucie Rutherfurd | 9/10 | 4761 days | 19% |
| Peter W. | 3/10 | 4825 days | 5% |
| Steve Neilson | 8/10 | 4832 days | 19% |
| Erik Folkersen | 4/10 | 4839 days | 8% |
| Mark de Boer | 8/10 | 4845 days | 19% |
| Tina | 9/10 | 4855 days | 19% |
| Jacquimd13 | 10/10 | 4978 days | 20% |
| Natascha Rachel | 7/10 | 5045 days | 17% |
| A Jones | 9/10 | 5072 days | 19% |
| Walker | 5/10 | 5072 days | 12% |
| Lindsey Clough | 2/10 | 5078 days | 2% |
| Natalie Maguire | 5/10 | 5083 days | 12% |
| Andreas Rath | 6/10 | 5085 days | 15% |
| Peter & Angela Brown | 10/10 | 5090 days | 20% |
| Chris Ashton | 7/10 | 5094 days | 17% |
| Kees Stigter | 7/10 | 5096 days | 17% |
| Diete Rokosch | 9/10 | 5101 days | 19% |
| Brian | 10/10 | 5103 days | 20% |
| Ronald Lippett | 8/10 | 5105 days | 19% |
| Ines | 8/10 | 5115 days | 19% |
| Julian Seizinger | 2/10 | 5115 days | 2% |
| Ann Thompson | 9/10 | 5116 days | 19% |
| Luise Jaeger | 10/10 | 5118 days | 20% |
| Eva Stauderova | 6/10 | 5119 days | 15% |
| Marianne Astorp | 8/10 | 5119 days | 19% |
| Henrik Petersen | 7/10 | 5121 days | 17% |
| Michael Eck | 8/10 | 5121 days | 19% |
| Lili | 8/10 | 5121 days | 19% |
| Florian | 7/10 | 5121 days | 17% |
| willsworthy | 5/10 | 5220 days | 12% |
| craigy | 5/10 | 5312 days | 12% |
| BigSis | 7/10 | 5312 days | 17% |
| Russ Turner | 2/10 | 5451 days | 2% |
| Andy | 6/10 | 5455 days | 15% |
| Michael Egli | 9/10 | 5456 days | 19% |
| Alan & Lorna | 3/10 | 5458 days | 5% |
| Venot | 7/10 | 5468 days | 17% |
| Roger Trusedale | 5/10 | 5475 days | 12% |
| David Rich | 6/10 | 5478 days | 15% |
| Mathias Skov | 4/10 | 5479 days | 8% |
| Nikki Wood | 6/10 | 5487 days | 15% |
| Mike Kirchner | 2/10 | 5489 days | 2% |
| Wolfgang G | 10/10 | 5499 days | 20% |
| Bo Moenstead | 8/10 | 5502 days | 19% |
| cees juffermans | 8/10 | 5506 days | 19% |
| Camenzind | 7/10 | 5513 days | 17% |
| Angela Stringer | 4/10 | 5524 days | 8% |
| blokzyl | 8/10 | 5544 days | 19% |
| aages | 9/10 | 5548 days | 19% |
| Emma Coltman | 5/10 | 5557 days | 12% |
| Helen Pet | 9/10 | 5563 days | 19% |
| nancyburns | 7/10 | 5585 days | 17% |
| Von | 5/10 | 5585 days | 12% |
| rita | 7/10 | 5664 days | 17% |
| Jess Thompson | 10/10 | 5677 days | 20% |
| Boxa Smith | 10/10 | 5677 days | 20% |
| LowerD | 9/10 | 5793 days | 19% |
| Sofie | 8/10 | 5799 days | 19% |
| Arjan Muis | 7/10 | 5801 days | 17% |
| Marion | 10/10 | 5803 days | 20% |
| Kim | 6/10 | 5803 days | 15% |
| MichaelS1 | 3/10 | 5815 days | 5% |
| ClodaghM | 8/10 | 5816 days | 19% |
| Andrew Wilson | 9/10 | 5816 days | 19% |
| FiensG | 8/10 | 5818 days | 19% |
| Joel | 7/10 | 5819 days | 17% |
| Robert | 4/10 | 5823 days | 8% |
| Chris | 8/10 | 5823 days | 19% |
| JuliaG1 | 7/10 | 5832 days | 17% |
| DavidMurray | 7/10 | 5833 days | 17% |
| AndrewF78 | 6/10 | 5835 days | 15% |
| Sarah | 8/10 | 5835 days | 19% |
| Carmel | 7/10 | 5839 days | 17% |
| marcusr | 7/10 | 5840 days | 17% |
| BethanD | 9/10 | 5846 days | 19% |
| ClaudiaK | 1/10 | 5848 days | 0% |
| Miguel | 3/10 | 5850 days | 5% |
| Ko | 8/10 | 5864 days | 19% |
| Nienhaus | 7/10 | 5866 days | 17% |
| Kern | 3/10 | 5884 days | 5% |
| Stephanie | 9/10 | 5899 days | 19% |
| Miha | 10/10 | 5904 days | 20% |
| Jacinta | 3/10 | 5930 days | 5% |
| Lara | 7/10 | 5977 days | 17% |
| Katie | 7/10 | 5995 days | 17% |
| Daniela Bell | 10/10 | 6006 days | 20% |
| Jenny | 7/10 | 6010 days | 17% |
| maria d | 10/10 | 6041 days | 20% |
| fgregory | 3/10 | 6062 days | 5% |
| woodolly | 3/10 | 6143 days | 5% |
| Christian | 6/10 | 6186 days | 15% |
| Alexandra Vogeli | 8/10 | 6186 days | 19% |
| Richard Steward | 9/10 | 6196 days | 19% |
| boukje | 8/10 | 6199 days | 19% |
| Stephanie | 10/10 | 6211 days | 20% |
| Carla | 8/10 | 6211 days | 19% |
| Melissa Steedman | 7/10 | 6238 days | 17% |
| Vanessa Brennan | 5/10 | 6238 days | 12% |
| Maria | 8/10 | 6242 days | 19% |
| Gerber Liselotte | 7/10 | 6273 days | 17% |
| Manuel | 5/10 | 6288 days | 12% |
| Tom Clements | 6/10 | 6289 days | 15% |
| Sally Walker | 9/10 | 6316 days | 19% |
| Bridgy | 10/10 | 6489 days | 20% |
| andrew julie | 8/10 | 6523 days | 19% |
| Bas Marieke | 8/10 | 6540 days | 19% |
| Richhouse | 8/10 | 6545 days | 19% |
| Dennis | 7/10 | 6546 days | 17% |
| Rietveld | 6/10 | 6557 days | 15% |
| Susanne | 5/10 | 6562 days | 12% |
| Lucy | 7/10 | 6562 days | 17% |
| Ralph | 7/10 | 6564 days | 17% |
| Nissa | 7/10 | 6564 days | 17% |
| Ash Sturm | 6/10 | 6681 days | 15% |
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 52 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 | -4.17% |
| 202 | -4.19% |
| 203 | -4.22% |
| … | … |
Balancing Adjustment
8.39% 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.