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.
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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 | 2303 days | 48% |
| Inez Cavallaro | 6/10 | 2364 days | 100% |
| John Farley | 10/10 | 2965 days | 79% |
| Frank Fabian | 8/10 | 3016 days | 74% |
| Les Hendy | 8/10 | 3042 days | 72% |
| Lea Celerier | 8/10 | 3043 days | 72% |
| Jane Scott | 9/10 | 3094 days | 70% |
| Michelle Smit | 8/10 | 3156 days | 65% |
| Jan Berendsen | 5/10 | 3251 days | 43% |
| Chandra Macraigne | 6/10 | 3286 days | 48% |
| Nanna Torp | 3/10 | 3288 days | 25% |
| Karel | 7/10 | 4025 days | 8% |
| Dick Kooij | 7/10 | 4446 days | 18% |
| Huw Davies | 8/10 | 4714 days | 19% |
| Goran Backlund | 7/10 | 4724 days | 18% |
| Marc Schmiedily | 3/10 | 4725 days | 5% |
| Martin Beuker | 8/10 | 4745 days | 19% |
| Richard Harvey | 8/10 | 4748 days | 19% |
| Mark Bogton | 5/10 | 4748 days | 12% |
| Thomas | 5/10 | 4750 days | 12% |
| Kimberley Mills | 8/10 | 4755 days | 19% |
| Scott Simpson | 5/10 | 4756 days | 12% |
| Luis Valenzuela | 5/10 | 4761 days | 12% |
| Petra | 8/10 | 4763 days | 19% |
| David Blundell | 7/10 | 4763 days | 18% |
| Lucie Rutherfurd | 9/10 | 4766 days | 20% |
| Peter W. | 3/10 | 4830 days | 5% |
| Steve Neilson | 8/10 | 4837 days | 19% |
| Erik Folkersen | 4/10 | 4844 days | 8% |
| Mark de Boer | 8/10 | 4850 days | 19% |
| Tina | 9/10 | 4860 days | 20% |
| Jacquimd13 | 10/10 | 4983 days | 20% |
| Natascha Rachel | 7/10 | 5050 days | 18% |
| A Jones | 9/10 | 5077 days | 20% |
| Walker | 5/10 | 5077 days | 12% |
| Lindsey Clough | 2/10 | 5083 days | 2% |
| Natalie Maguire | 5/10 | 5088 days | 12% |
| Andreas Rath | 6/10 | 5090 days | 15% |
| Peter & Angela Brown | 10/10 | 5095 days | 20% |
| Chris Ashton | 7/10 | 5099 days | 18% |
| Kees Stigter | 7/10 | 5101 days | 18% |
| Diete Rokosch | 9/10 | 5106 days | 20% |
| Brian | 10/10 | 5108 days | 20% |
| Ronald Lippett | 8/10 | 5110 days | 19% |
| Ines | 8/10 | 5120 days | 19% |
| Julian Seizinger | 2/10 | 5120 days | 2% |
| Ann Thompson | 9/10 | 5121 days | 20% |
| Luise Jaeger | 10/10 | 5123 days | 20% |
| Eva Stauderova | 6/10 | 5124 days | 15% |
| Marianne Astorp | 8/10 | 5124 days | 19% |
| Henrik Petersen | 7/10 | 5126 days | 18% |
| Michael Eck | 8/10 | 5126 days | 19% |
| Lili | 8/10 | 5126 days | 19% |
| Florian | 7/10 | 5126 days | 18% |
| willsworthy | 5/10 | 5225 days | 12% |
| craigy | 5/10 | 5317 days | 12% |
| BigSis | 7/10 | 5317 days | 18% |
| Russ Turner | 2/10 | 5456 days | 2% |
| Andy | 6/10 | 5460 days | 15% |
| Michael Egli | 9/10 | 5461 days | 20% |
| Alan & Lorna | 3/10 | 5463 days | 5% |
| Venot | 7/10 | 5473 days | 18% |
| Roger Trusedale | 5/10 | 5480 days | 12% |
| David Rich | 6/10 | 5483 days | 15% |
| Mathias Skov | 4/10 | 5484 days | 8% |
| Nikki Wood | 6/10 | 5492 days | 15% |
| Mike Kirchner | 2/10 | 5494 days | 2% |
| Wolfgang G | 10/10 | 5504 days | 20% |
| Bo Moenstead | 8/10 | 5507 days | 19% |
| cees juffermans | 8/10 | 5511 days | 19% |
| Camenzind | 7/10 | 5518 days | 18% |
| Angela Stringer | 4/10 | 5529 days | 8% |
| blokzyl | 8/10 | 5549 days | 19% |
| aages | 9/10 | 5553 days | 20% |
| Emma Coltman | 5/10 | 5562 days | 12% |
| Helen Pet | 9/10 | 5568 days | 20% |
| nancyburns | 7/10 | 5590 days | 18% |
| Von | 5/10 | 5590 days | 12% |
| rita | 7/10 | 5669 days | 18% |
| Jess Thompson | 10/10 | 5682 days | 20% |
| Boxa Smith | 10/10 | 5682 days | 20% |
| LowerD | 9/10 | 5798 days | 20% |
| Sofie | 8/10 | 5804 days | 19% |
| Arjan Muis | 7/10 | 5806 days | 18% |
| Marion | 10/10 | 5808 days | 20% |
| Kim | 6/10 | 5808 days | 15% |
| MichaelS1 | 3/10 | 5820 days | 5% |
| ClodaghM | 8/10 | 5821 days | 19% |
| Andrew Wilson | 9/10 | 5821 days | 20% |
| FiensG | 8/10 | 5823 days | 19% |
| Joel | 7/10 | 5824 days | 18% |
| Robert | 4/10 | 5828 days | 8% |
| Chris | 8/10 | 5828 days | 19% |
| JuliaG1 | 7/10 | 5837 days | 18% |
| DavidMurray | 7/10 | 5838 days | 18% |
| AndrewF78 | 6/10 | 5840 days | 15% |
| Sarah | 8/10 | 5841 days | 19% |
| Carmel | 7/10 | 5844 days | 18% |
| marcusr | 7/10 | 5846 days | 18% |
| BethanD | 9/10 | 5851 days | 20% |
| ClaudiaK | 1/10 | 5853 days | 0% |
| Miguel | 3/10 | 5855 days | 5% |
| Ko | 8/10 | 5869 days | 19% |
| Nienhaus | 7/10 | 5871 days | 18% |
| Kern | 3/10 | 5889 days | 5% |
| Stephanie | 9/10 | 5904 days | 20% |
| Miha | 10/10 | 5909 days | 20% |
| Jacinta | 3/10 | 5935 days | 5% |
| Lara | 7/10 | 5982 days | 18% |
| Katie | 7/10 | 6000 days | 18% |
| Daniela Bell | 10/10 | 6011 days | 20% |
| Jenny | 7/10 | 6015 days | 18% |
| maria d | 10/10 | 6047 days | 20% |
| fgregory | 3/10 | 6067 days | 5% |
| woodolly | 3/10 | 6148 days | 5% |
| Christian | 6/10 | 6191 days | 15% |
| Alexandra Vogeli | 8/10 | 6191 days | 19% |
| Richard Steward | 9/10 | 6201 days | 20% |
| boukje | 8/10 | 6204 days | 19% |
| Stephanie | 10/10 | 6216 days | 20% |
| Carla | 8/10 | 6216 days | 19% |
| Melissa Steedman | 7/10 | 6243 days | 18% |
| Vanessa Brennan | 5/10 | 6243 days | 12% |
| Maria | 8/10 | 6247 days | 19% |
| Gerber Liselotte | 7/10 | 6278 days | 18% |
| Manuel | 5/10 | 6293 days | 12% |
| Tom Clements | 6/10 | 6294 days | 15% |
| Sally Walker | 9/10 | 6321 days | 20% |
| Bridgy | 10/10 | 6494 days | 20% |
| andrew julie | 8/10 | 6528 days | 19% |
| Bas Marieke | 8/10 | 6545 days | 19% |
| Richhouse | 8/10 | 6550 days | 19% |
| Dennis | 7/10 | 6551 days | 18% |
| Rietveld | 6/10 | 6562 days | 15% |
| Susanne | 5/10 | 6567 days | 12% |
| Lucy | 7/10 | 6567 days | 18% |
| Ralph | 7/10 | 6569 days | 18% |
| Nissa | 7/10 | 6569 days | 18% |
| Ash Sturm | 6/10 | 6686 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
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 53 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 | -4.08% |
| 198 | -4.10% |
| 199 | -4.12% |
| 200 | -4.14% |
| 201 | -4.16% |
| 202 | -4.19% |
| 203 | -4.21% |
| … | … |
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.