G'day, 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 | 2324 days | 48% |
| Inez Cavallaro | 6/10 | 2384 days | 100% |
| John Farley | 10/10 | 2986 days | 78% |
| Frank Fabian | 8/10 | 3037 days | 73% |
| Les Hendy | 8/10 | 3063 days | 72% |
| Lea Celerier | 8/10 | 3064 days | 72% |
| Jane Scott | 9/10 | 3114 days | 69% |
| Michelle Smit | 8/10 | 3176 days | 64% |
| Jan Berendsen | 5/10 | 3272 days | 42% |
| Chandra Macraigne | 6/10 | 3307 days | 47% |
| Nanna Torp | 3/10 | 3309 days | 25% |
| Karel | 7/10 | 4046 days | 7% |
| Dick Kooij | 7/10 | 4467 days | 18% |
| Huw Davies | 8/10 | 4735 days | 19% |
| Goran Backlund | 7/10 | 4745 days | 18% |
| Marc Schmiedily | 3/10 | 4746 days | 5% |
| Martin Beuker | 8/10 | 4766 days | 19% |
| Richard Harvey | 8/10 | 4769 days | 19% |
| Mark Bogton | 5/10 | 4769 days | 12% |
| Thomas | 5/10 | 4771 days | 12% |
| Kimberley Mills | 8/10 | 4776 days | 19% |
| Scott Simpson | 5/10 | 4777 days | 12% |
| Luis Valenzuela | 5/10 | 4782 days | 12% |
| Petra | 8/10 | 4784 days | 19% |
| David Blundell | 7/10 | 4784 days | 18% |
| Lucie Rutherfurd | 9/10 | 4787 days | 20% |
| Peter W. | 3/10 | 4851 days | 5% |
| Steve Neilson | 8/10 | 4858 days | 19% |
| Erik Folkersen | 4/10 | 4865 days | 8% |
| Mark de Boer | 8/10 | 4871 days | 19% |
| Tina | 9/10 | 4881 days | 20% |
| Jacquimd13 | 10/10 | 5003 days | 20% |
| Natascha Rachel | 7/10 | 5070 days | 18% |
| A Jones | 9/10 | 5098 days | 20% |
| Walker | 5/10 | 5098 days | 12% |
| Lindsey Clough | 2/10 | 5104 days | 2% |
| Natalie Maguire | 5/10 | 5109 days | 12% |
| Andreas Rath | 6/10 | 5111 days | 15% |
| Peter & Angela Brown | 10/10 | 5116 days | 20% |
| Chris Ashton | 7/10 | 5120 days | 18% |
| Kees Stigter | 7/10 | 5122 days | 18% |
| Diete Rokosch | 9/10 | 5127 days | 20% |
| Brian | 10/10 | 5129 days | 20% |
| Ronald Lippett | 8/10 | 5131 days | 19% |
| Ines | 8/10 | 5141 days | 19% |
| Julian Seizinger | 2/10 | 5141 days | 2% |
| Ann Thompson | 9/10 | 5142 days | 20% |
| Luise Jaeger | 10/10 | 5144 days | 20% |
| Eva Stauderova | 6/10 | 5145 days | 15% |
| Marianne Astorp | 8/10 | 5145 days | 19% |
| Henrik Petersen | 7/10 | 5147 days | 18% |
| Michael Eck | 8/10 | 5147 days | 19% |
| Lili | 8/10 | 5147 days | 19% |
| Florian | 7/10 | 5147 days | 18% |
| willsworthy | 5/10 | 5246 days | 12% |
| craigy | 5/10 | 5337 days | 12% |
| BigSis | 7/10 | 5337 days | 18% |
| Russ Turner | 2/10 | 5477 days | 2% |
| Andy | 6/10 | 5481 days | 15% |
| Michael Egli | 9/10 | 5482 days | 20% |
| Alan & Lorna | 3/10 | 5484 days | 5% |
| Venot | 7/10 | 5494 days | 18% |
| Roger Trusedale | 5/10 | 5501 days | 12% |
| David Rich | 6/10 | 5504 days | 15% |
| Mathias Skov | 4/10 | 5505 days | 8% |
| Nikki Wood | 6/10 | 5513 days | 15% |
| Mike Kirchner | 2/10 | 5515 days | 2% |
| Wolfgang G | 10/10 | 5525 days | 20% |
| Bo Moenstead | 8/10 | 5528 days | 19% |
| cees juffermans | 8/10 | 5532 days | 19% |
| Camenzind | 7/10 | 5539 days | 18% |
| Angela Stringer | 4/10 | 5550 days | 8% |
| blokzyl | 8/10 | 5570 days | 19% |
| aages | 9/10 | 5574 days | 20% |
| Emma Coltman | 5/10 | 5583 days | 12% |
| Helen Pet | 9/10 | 5589 days | 20% |
| nancyburns | 7/10 | 5611 days | 18% |
| Von | 5/10 | 5611 days | 12% |
| rita | 7/10 | 5689 days | 18% |
| Jess Thompson | 10/10 | 5702 days | 20% |
| Boxa Smith | 10/10 | 5702 days | 20% |
| LowerD | 9/10 | 5818 days | 20% |
| Sofie | 8/10 | 5825 days | 19% |
| Arjan Muis | 7/10 | 5827 days | 18% |
| Marion | 10/10 | 5829 days | 20% |
| Kim | 6/10 | 5829 days | 15% |
| MichaelS1 | 3/10 | 5841 days | 5% |
| ClodaghM | 8/10 | 5842 days | 19% |
| Andrew Wilson | 9/10 | 5842 days | 20% |
| FiensG | 8/10 | 5844 days | 19% |
| Joel | 7/10 | 5845 days | 18% |
| Robert | 4/10 | 5848 days | 8% |
| Chris | 8/10 | 5849 days | 19% |
| JuliaG1 | 7/10 | 5858 days | 18% |
| DavidMurray | 7/10 | 5859 days | 18% |
| AndrewF78 | 6/10 | 5861 days | 15% |
| Sarah | 8/10 | 5861 days | 19% |
| Carmel | 7/10 | 5865 days | 18% |
| marcusr | 7/10 | 5866 days | 18% |
| BethanD | 9/10 | 5872 days | 20% |
| ClaudiaK | 1/10 | 5874 days | 0% |
| Miguel | 3/10 | 5875 days | 5% |
| Ko | 8/10 | 5889 days | 19% |
| Nienhaus | 7/10 | 5892 days | 18% |
| Kern | 3/10 | 5909 days | 5% |
| Stephanie | 9/10 | 5925 days | 20% |
| Miha | 10/10 | 5929 days | 20% |
| Jacinta | 3/10 | 5955 days | 5% |
| Lara | 7/10 | 6002 days | 18% |
| Katie | 7/10 | 6020 days | 18% |
| Daniela Bell | 10/10 | 6031 days | 20% |
| Jenny | 7/10 | 6035 days | 18% |
| maria d | 10/10 | 6067 days | 20% |
| fgregory | 3/10 | 6087 days | 5% |
| woodolly | 3/10 | 6168 days | 5% |
| Christian | 6/10 | 6212 days | 15% |
| Alexandra Vogeli | 8/10 | 6212 days | 19% |
| Richard Steward | 9/10 | 6222 days | 20% |
| boukje | 8/10 | 6225 days | 19% |
| Stephanie | 10/10 | 6237 days | 20% |
| Carla | 8/10 | 6237 days | 19% |
| Melissa Steedman | 7/10 | 6264 days | 18% |
| Vanessa Brennan | 5/10 | 6264 days | 12% |
| Maria | 8/10 | 6268 days | 19% |
| Gerber Liselotte | 7/10 | 6299 days | 18% |
| Manuel | 5/10 | 6314 days | 12% |
| Tom Clements | 6/10 | 6315 days | 15% |
| Sally Walker | 9/10 | 6342 days | 20% |
| Bridgy | 10/10 | 6514 days | 20% |
| andrew julie | 8/10 | 6548 days | 19% |
| Bas Marieke | 8/10 | 6565 days | 19% |
| Richhouse | 8/10 | 6571 days | 19% |
| Dennis | 7/10 | 6572 days | 18% |
| Rietveld | 6/10 | 6583 days | 15% |
| Susanne | 5/10 | 6588 days | 12% |
| Lucy | 7/10 | 6588 days | 18% |
| Ralph | 7/10 | 6590 days | 18% |
| Nissa | 7/10 | 6590 days | 18% |
| Ash Sturm | 6/10 | 6707 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
-4.01% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 57 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 | -3.95% |
| 198 | -3.97% |
| 199 | -3.99% |
| 200 | -4.01% |
| 201 | -4.03% |
| 202 | -4.05% |
| 203 | -4.07% |
| … | … |
Balancing Adjustment
8.30% 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.