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
71.87%
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 | 2687 days | 47% |
| Inez Cavallaro | 6/10 | 2748 days | 100% |
| John Farley | 10/10 | 3349 days | 69% |
| Frank Fabian | 8/10 | 3400 days | 63% |
| Les Hendy | 8/10 | 3426 days | 61% |
| Lea Celerier | 8/10 | 3427 days | 61% |
| Jane Scott | 9/10 | 3477 days | 57% |
| Michelle Smit | 8/10 | 3539 days | 51% |
| Jan Berendsen | 5/10 | 3635 days | 30% |
| Chandra Macraigne | 6/10 | 3670 days | 34% |
| Nanna Torp | 3/10 | 3672 days | 15% |
| Karel | 7/10 | 4409 days | 22% |
| Dick Kooij | 7/10 | 4830 days | 22% |
| Huw Davies | 8/10 | 5098 days | 24% |
| Goran Backlund | 7/10 | 5108 days | 22% |
| Marc Schmiedily | 3/10 | 5109 days | 6% |
| Martin Beuker | 8/10 | 5129 days | 24% |
| Richard Harvey | 8/10 | 5132 days | 24% |
| Mark Bogton | 5/10 | 5132 days | 15% |
| Thomas | 5/10 | 5134 days | 15% |
| Kimberley Mills | 8/10 | 5139 days | 24% |
| Scott Simpson | 5/10 | 5140 days | 15% |
| Luis Valenzuela | 5/10 | 5145 days | 15% |
| Petra | 8/10 | 5147 days | 24% |
| David Blundell | 7/10 | 5147 days | 22% |
| Lucie Rutherfurd | 9/10 | 5150 days | 25% |
| Peter W. | 3/10 | 5214 days | 6% |
| Steve Neilson | 8/10 | 5221 days | 24% |
| Erik Folkersen | 4/10 | 5228 days | 11% |
| Mark de Boer | 8/10 | 5234 days | 24% |
| Tina | 9/10 | 5244 days | 25% |
| Jacquimd13 | 10/10 | 5367 days | 25% |
| Natascha Rachel | 7/10 | 5434 days | 22% |
| A Jones | 9/10 | 5461 days | 25% |
| Walker | 5/10 | 5461 days | 15% |
| Lindsey Clough | 2/10 | 5467 days | 2% |
| Natalie Maguire | 5/10 | 5472 days | 15% |
| Andreas Rath | 6/10 | 5474 days | 19% |
| Peter & Angela Brown | 10/10 | 5479 days | 25% |
| Chris Ashton | 7/10 | 5483 days | 22% |
| Kees Stigter | 7/10 | 5485 days | 22% |
| Diete Rokosch | 9/10 | 5490 days | 25% |
| Brian | 10/10 | 5492 days | 25% |
| Ronald Lippett | 8/10 | 5494 days | 24% |
| Ines | 8/10 | 5504 days | 24% |
| Julian Seizinger | 2/10 | 5504 days | 2% |
| Ann Thompson | 9/10 | 5505 days | 25% |
| Luise Jaeger | 10/10 | 5507 days | 25% |
| Eva Stauderova | 6/10 | 5508 days | 19% |
| Marianne Astorp | 8/10 | 5508 days | 24% |
| Henrik Petersen | 7/10 | 5510 days | 22% |
| Michael Eck | 8/10 | 5510 days | 24% |
| Lili | 8/10 | 5510 days | 24% |
| Florian | 7/10 | 5510 days | 22% |
| willsworthy | 5/10 | 5609 days | 15% |
| craigy | 5/10 | 5701 days | 15% |
| BigSis | 7/10 | 5701 days | 22% |
| Russ Turner | 2/10 | 5840 days | 2% |
| Andy | 6/10 | 5844 days | 19% |
| Michael Egli | 9/10 | 5845 days | 25% |
| Alan & Lorna | 3/10 | 5847 days | 6% |
| Venot | 7/10 | 5857 days | 22% |
| Roger Trusedale | 5/10 | 5864 days | 15% |
| David Rich | 6/10 | 5867 days | 19% |
| Mathias Skov | 4/10 | 5868 days | 11% |
| Nikki Wood | 6/10 | 5876 days | 19% |
| Mike Kirchner | 2/10 | 5878 days | 2% |
| Wolfgang G | 10/10 | 5888 days | 25% |
| Bo Moenstead | 8/10 | 5891 days | 24% |
| cees juffermans | 8/10 | 5895 days | 24% |
| Camenzind | 7/10 | 5902 days | 22% |
| Angela Stringer | 4/10 | 5913 days | 11% |
| blokzyl | 8/10 | 5933 days | 24% |
| aages | 9/10 | 5937 days | 25% |
| Emma Coltman | 5/10 | 5946 days | 15% |
| Helen Pet | 9/10 | 5952 days | 25% |
| nancyburns | 7/10 | 5974 days | 22% |
| Von | 5/10 | 5974 days | 15% |
| rita | 7/10 | 6053 days | 22% |
| Jess Thompson | 10/10 | 6066 days | 25% |
| Boxa Smith | 10/10 | 6066 days | 25% |
| LowerD | 9/10 | 6182 days | 25% |
| Sofie | 8/10 | 6188 days | 24% |
| Arjan Muis | 7/10 | 6190 days | 22% |
| Marion | 10/10 | 6192 days | 25% |
| Kim | 6/10 | 6192 days | 19% |
| MichaelS1 | 3/10 | 6204 days | 6% |
| ClodaghM | 8/10 | 6205 days | 24% |
| Andrew Wilson | 9/10 | 6205 days | 25% |
| FiensG | 8/10 | 6207 days | 24% |
| Joel | 7/10 | 6208 days | 22% |
| Robert | 4/10 | 6211 days | 11% |
| Chris | 8/10 | 6212 days | 24% |
| JuliaG1 | 7/10 | 6221 days | 22% |
| DavidMurray | 7/10 | 6222 days | 22% |
| AndrewF78 | 6/10 | 6224 days | 19% |
| Sarah | 8/10 | 6224 days | 24% |
| Carmel | 7/10 | 6228 days | 22% |
| marcusr | 7/10 | 6229 days | 22% |
| BethanD | 9/10 | 6235 days | 25% |
| ClaudiaK | 1/10 | 6237 days | 0% |
| Miguel | 3/10 | 6238 days | 6% |
| Ko | 8/10 | 6252 days | 24% |
| Nienhaus | 7/10 | 6255 days | 22% |
| Kern | 3/10 | 6272 days | 6% |
| Stephanie | 9/10 | 6288 days | 25% |
| Miha | 10/10 | 6293 days | 25% |
| Jacinta | 3/10 | 6318 days | 6% |
| Lara | 7/10 | 6365 days | 22% |
| Katie | 7/10 | 6383 days | 22% |
| Daniela Bell | 10/10 | 6394 days | 25% |
| Jenny | 7/10 | 6398 days | 22% |
| maria d | 10/10 | 6430 days | 25% |
| fgregory | 3/10 | 6450 days | 6% |
| woodolly | 3/10 | 6531 days | 6% |
| Christian | 6/10 | 6575 days | 19% |
| Alexandra Vogeli | 8/10 | 6575 days | 24% |
| Richard Steward | 9/10 | 6585 days | 25% |
| boukje | 8/10 | 6588 days | 24% |
| Stephanie | 10/10 | 6600 days | 25% |
| Carla | 8/10 | 6600 days | 24% |
| Melissa Steedman | 7/10 | 6627 days | 22% |
| Vanessa Brennan | 5/10 | 6627 days | 15% |
| Maria | 8/10 | 6631 days | 24% |
| Gerber Liselotte | 7/10 | 6662 days | 22% |
| Manuel | 5/10 | 6677 days | 15% |
| Tom Clements | 6/10 | 6678 days | 19% |
| Sally Walker | 9/10 | 6705 days | 25% |
| Bridgy | 10/10 | 6878 days | 25% |
| andrew julie | 8/10 | 6912 days | 24% |
| Bas Marieke | 8/10 | 6929 days | 24% |
| Richhouse | 8/10 | 6934 days | 24% |
| Dennis | 7/10 | 6935 days | 22% |
| Rietveld | 6/10 | 6946 days | 19% |
| Susanne | 5/10 | 6951 days | 15% |
| Lucy | 7/10 | 6951 days | 22% |
| Ralph | 7/10 | 6953 days | 22% |
| Nissa | 7/10 | 6953 days | 22% |
| Ash Sturm | 6/10 | 7070 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
-4.03% 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 | -3.97% |
| 198 | -3.99% |
| 199 | -4.01% |
| 200 | -4.03% |
| 201 | -4.05% |
| 202 | -4.07% |
| 203 | -4.09% |
| … | … |
Balancing Adjustment
8.29% 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.