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
71.83%
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 | 2144 days | 52% |
| Inez Cavallaro | 6/10 | 2205 days | 100% |
| John Farley | 10/10 | 2806 days | 83% |
| Frank Fabian | 8/10 | 2857 days | 79% |
| Les Hendy | 8/10 | 2883 days | 77% |
| Lea Celerier | 8/10 | 2884 days | 77% |
| Jane Scott | 9/10 | 2935 days | 75% |
| Michelle Smit | 8/10 | 2997 days | 71% |
| Jan Berendsen | 5/10 | 3092 days | 50% |
| Chandra Macraigne | 6/10 | 3127 days | 56% |
| Nanna Torp | 3/10 | 3129 days | 33% |
| Karel | 7/10 | 3866 days | 22% |
| Dick Kooij | 7/10 | 4287 days | 0% |
| Huw Davies | 8/10 | 4555 days | 23% |
| Goran Backlund | 7/10 | 4565 days | 22% |
| Marc Schmiedily | 3/10 | 4566 days | 11% |
| Martin Beuker | 8/10 | 4586 days | 23% |
| Richard Harvey | 8/10 | 4589 days | 23% |
| Mark Bogton | 5/10 | 4589 days | 17% |
| Thomas | 5/10 | 4591 days | 17% |
| Kimberley Mills | 8/10 | 4596 days | 23% |
| Scott Simpson | 5/10 | 4597 days | 17% |
| Luis Valenzuela | 5/10 | 4602 days | 17% |
| Petra | 8/10 | 4604 days | 23% |
| David Blundell | 7/10 | 4604 days | 22% |
| Lucie Rutherfurd | 9/10 | 4607 days | 23% |
| Peter W. | 3/10 | 4671 days | 11% |
| Steve Neilson | 8/10 | 4678 days | 23% |
| Erik Folkersen | 4/10 | 4685 days | 14% |
| Mark de Boer | 8/10 | 4691 days | 23% |
| Tina | 9/10 | 4701 days | 23% |
| Jacquimd13 | 10/10 | 4824 days | 24% |
| Natascha Rachel | 7/10 | 4891 days | 22% |
| A Jones | 9/10 | 4918 days | 23% |
| Walker | 5/10 | 4918 days | 17% |
| Lindsey Clough | 2/10 | 4924 days | 8% |
| Natalie Maguire | 5/10 | 4929 days | 17% |
| Andreas Rath | 6/10 | 4931 days | 20% |
| Peter & Angela Brown | 10/10 | 4936 days | 24% |
| Chris Ashton | 7/10 | 4940 days | 22% |
| Kees Stigter | 7/10 | 4942 days | 22% |
| Diete Rokosch | 9/10 | 4947 days | 23% |
| Brian | 10/10 | 4949 days | 24% |
| Ronald Lippett | 8/10 | 4951 days | 23% |
| Ines | 8/10 | 4961 days | 23% |
| Julian Seizinger | 2/10 | 4961 days | 8% |
| Ann Thompson | 9/10 | 4962 days | 23% |
| Luise Jaeger | 10/10 | 4964 days | 24% |
| Eva Stauderova | 6/10 | 4965 days | 20% |
| Marianne Astorp | 8/10 | 4965 days | 23% |
| Henrik Petersen | 7/10 | 4967 days | 22% |
| Michael Eck | 8/10 | 4967 days | 23% |
| Lili | 8/10 | 4967 days | 23% |
| Florian | 7/10 | 4967 days | 22% |
| willsworthy | 5/10 | 5066 days | 17% |
| craigy | 5/10 | 5158 days | 17% |
| BigSis | 7/10 | 5158 days | 22% |
| Russ Turner | 2/10 | 5297 days | 8% |
| Andy | 6/10 | 5301 days | 20% |
| Michael Egli | 9/10 | 5302 days | 23% |
| Alan & Lorna | 3/10 | 5304 days | 11% |
| Venot | 7/10 | 5314 days | 22% |
| Roger Trusedale | 5/10 | 5321 days | 17% |
| David Rich | 6/10 | 5324 days | 20% |
| Mathias Skov | 4/10 | 5325 days | 14% |
| Nikki Wood | 6/10 | 5333 days | 20% |
| Mike Kirchner | 2/10 | 5335 days | 8% |
| Wolfgang G | 10/10 | 5345 days | 24% |
| Bo Moenstead | 8/10 | 5348 days | 23% |
| cees juffermans | 8/10 | 5352 days | 23% |
| Camenzind | 7/10 | 5359 days | 22% |
| Angela Stringer | 4/10 | 5370 days | 14% |
| blokzyl | 8/10 | 5390 days | 23% |
| aages | 9/10 | 5394 days | 23% |
| Emma Coltman | 5/10 | 5403 days | 17% |
| Helen Pet | 9/10 | 5409 days | 23% |
| nancyburns | 7/10 | 5431 days | 22% |
| Von | 5/10 | 5431 days | 17% |
| rita | 7/10 | 5510 days | 22% |
| Jess Thompson | 10/10 | 5523 days | 24% |
| Boxa Smith | 10/10 | 5523 days | 24% |
| LowerD | 9/10 | 5639 days | 23% |
| Sofie | 8/10 | 5645 days | 23% |
| Arjan Muis | 7/10 | 5647 days | 22% |
| Marion | 10/10 | 5649 days | 24% |
| Kim | 6/10 | 5649 days | 20% |
| MichaelS1 | 3/10 | 5661 days | 11% |
| ClodaghM | 8/10 | 5662 days | 23% |
| Andrew Wilson | 9/10 | 5662 days | 23% |
| FiensG | 8/10 | 5664 days | 23% |
| Joel | 7/10 | 5665 days | 22% |
| Robert | 4/10 | 5669 days | 14% |
| Chris | 8/10 | 5669 days | 23% |
| JuliaG1 | 7/10 | 5678 days | 22% |
| DavidMurray | 7/10 | 5679 days | 22% |
| AndrewF78 | 6/10 | 5681 days | 20% |
| Sarah | 8/10 | 5682 days | 23% |
| Carmel | 7/10 | 5686 days | 22% |
| marcusr | 7/10 | 5687 days | 22% |
| BethanD | 9/10 | 5692 days | 23% |
| ClaudiaK | 1/10 | 5694 days | 7% |
| Miguel | 3/10 | 5696 days | 11% |
| Ko | 8/10 | 5710 days | 23% |
| Nienhaus | 7/10 | 5712 days | 22% |
| Kern | 3/10 | 5730 days | 11% |
| Stephanie | 9/10 | 5745 days | 23% |
| Miha | 10/10 | 5750 days | 24% |
| Jacinta | 3/10 | 5776 days | 11% |
| Lara | 7/10 | 5823 days | 22% |
| Katie | 7/10 | 5841 days | 22% |
| Daniela Bell | 10/10 | 5852 days | 24% |
| Jenny | 7/10 | 5856 days | 22% |
| maria d | 10/10 | 5888 days | 24% |
| fgregory | 3/10 | 5908 days | 11% |
| woodolly | 3/10 | 5989 days | 11% |
| Christian | 6/10 | 6032 days | 20% |
| Alexandra Vogeli | 8/10 | 6032 days | 23% |
| Richard Steward | 9/10 | 6042 days | 23% |
| boukje | 8/10 | 6046 days | 23% |
| Stephanie | 10/10 | 6057 days | 24% |
| Carla | 8/10 | 6057 days | 23% |
| Melissa Steedman | 7/10 | 6084 days | 22% |
| Vanessa Brennan | 5/10 | 6084 days | 17% |
| Maria | 8/10 | 6088 days | 23% |
| Gerber Liselotte | 7/10 | 6119 days | 22% |
| Manuel | 5/10 | 6134 days | 17% |
| Tom Clements | 6/10 | 6135 days | 20% |
| Sally Walker | 9/10 | 6162 days | 23% |
| Bridgy | 10/10 | 6335 days | 24% |
| andrew julie | 8/10 | 6369 days | 23% |
| Bas Marieke | 8/10 | 6386 days | 23% |
| Richhouse | 8/10 | 6391 days | 23% |
| Dennis | 7/10 | 6392 days | 22% |
| Rietveld | 6/10 | 6403 days | 20% |
| Susanne | 5/10 | 6408 days | 17% |
| Lucy | 7/10 | 6408 days | 22% |
| Ralph | 7/10 | 6410 days | 22% |
| Nissa | 7/10 | 6410 days | 22% |
| Ash Sturm | 6/10 | 6527 days | 20% |
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
-2.92% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 79 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 | -2.87% |
| 198 | -2.89% |
| 199 | -2.90% |
| 200 | -2.92% |
| 201 | -2.93% |
| 202 | -2.95% |
| 203 | -2.96% |
| … | … |
Balancing Adjustment
7.63% 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
77%
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.