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
71.88%
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 | 2867 days | 46% |
| Inez Cavallaro | 6/10 | 2928 days | 100% |
| John Farley | 10/10 | 3529 days | 62% |
| Frank Fabian | 8/10 | 3580 days | 55% |
| Les Hendy | 8/10 | 3606 days | 53% |
| Lea Celerier | 8/10 | 3607 days | 53% |
| Jane Scott | 9/10 | 3658 days | 49% |
| Michelle Smit | 8/10 | 3720 days | 42% |
| Jan Berendsen | 5/10 | 3815 days | 21% |
| Chandra Macraigne | 6/10 | 3850 days | 24% |
| Nanna Torp | 3/10 | 3852 days | 8% |
| Karel | 7/10 | 4589 days | 26% |
| Dick Kooij | 7/10 | 5010 days | 26% |
| Huw Davies | 8/10 | 5278 days | 28% |
| Goran Backlund | 7/10 | 5288 days | 26% |
| Marc Schmiedily | 3/10 | 5289 days | 7% |
| Martin Beuker | 8/10 | 5309 days | 28% |
| Richard Harvey | 8/10 | 5312 days | 28% |
| Mark Bogton | 5/10 | 5312 days | 17% |
| Thomas | 5/10 | 5314 days | 17% |
| Kimberley Mills | 8/10 | 5319 days | 28% |
| Scott Simpson | 5/10 | 5320 days | 17% |
| Luis Valenzuela | 5/10 | 5325 days | 17% |
| Petra | 8/10 | 5327 days | 28% |
| David Blundell | 7/10 | 5327 days | 26% |
| Lucie Rutherfurd | 9/10 | 5330 days | 29% |
| Peter W. | 3/10 | 5394 days | 7% |
| Steve Neilson | 8/10 | 5401 days | 28% |
| Erik Folkersen | 4/10 | 5408 days | 12% |
| Mark de Boer | 8/10 | 5414 days | 28% |
| Tina | 9/10 | 5424 days | 29% |
| Jacquimd13 | 10/10 | 5547 days | 29% |
| Natascha Rachel | 7/10 | 5614 days | 26% |
| A Jones | 9/10 | 5641 days | 29% |
| Walker | 5/10 | 5641 days | 17% |
| Lindsey Clough | 2/10 | 5647 days | 2% |
| Natalie Maguire | 5/10 | 5652 days | 17% |
| Andreas Rath | 6/10 | 5654 days | 22% |
| Peter & Angela Brown | 10/10 | 5659 days | 29% |
| Chris Ashton | 7/10 | 5663 days | 26% |
| Kees Stigter | 7/10 | 5665 days | 26% |
| Diete Rokosch | 9/10 | 5670 days | 29% |
| Brian | 10/10 | 5672 days | 29% |
| Ronald Lippett | 8/10 | 5674 days | 28% |
| Ines | 8/10 | 5684 days | 28% |
| Julian Seizinger | 2/10 | 5684 days | 2% |
| Ann Thompson | 9/10 | 5685 days | 29% |
| Luise Jaeger | 10/10 | 5687 days | 29% |
| Eva Stauderova | 6/10 | 5688 days | 22% |
| Marianne Astorp | 8/10 | 5688 days | 28% |
| Henrik Petersen | 7/10 | 5690 days | 26% |
| Michael Eck | 8/10 | 5690 days | 28% |
| Lili | 8/10 | 5690 days | 28% |
| Florian | 7/10 | 5690 days | 26% |
| willsworthy | 5/10 | 5789 days | 17% |
| craigy | 5/10 | 5881 days | 17% |
| BigSis | 7/10 | 5881 days | 26% |
| Russ Turner | 2/10 | 6020 days | 2% |
| Andy | 6/10 | 6024 days | 22% |
| Michael Egli | 9/10 | 6025 days | 29% |
| Alan & Lorna | 3/10 | 6027 days | 7% |
| Venot | 7/10 | 6037 days | 26% |
| Roger Trusedale | 5/10 | 6044 days | 17% |
| David Rich | 6/10 | 6047 days | 22% |
| Mathias Skov | 4/10 | 6048 days | 12% |
| Nikki Wood | 6/10 | 6056 days | 22% |
| Mike Kirchner | 2/10 | 6058 days | 2% |
| Wolfgang G | 10/10 | 6068 days | 29% |
| Bo Moenstead | 8/10 | 6071 days | 28% |
| cees juffermans | 8/10 | 6075 days | 28% |
| Camenzind | 7/10 | 6082 days | 26% |
| Angela Stringer | 4/10 | 6093 days | 12% |
| blokzyl | 8/10 | 6113 days | 28% |
| aages | 9/10 | 6117 days | 29% |
| Emma Coltman | 5/10 | 6126 days | 17% |
| Helen Pet | 9/10 | 6132 days | 29% |
| nancyburns | 7/10 | 6154 days | 26% |
| Von | 5/10 | 6154 days | 17% |
| rita | 7/10 | 6233 days | 26% |
| Jess Thompson | 10/10 | 6246 days | 29% |
| Boxa Smith | 10/10 | 6246 days | 29% |
| LowerD | 9/10 | 6362 days | 29% |
| Sofie | 8/10 | 6368 days | 28% |
| Arjan Muis | 7/10 | 6370 days | 26% |
| Marion | 10/10 | 6373 days | 29% |
| Kim | 6/10 | 6373 days | 22% |
| MichaelS1 | 3/10 | 6384 days | 7% |
| ClodaghM | 8/10 | 6385 days | 28% |
| Andrew Wilson | 9/10 | 6385 days | 29% |
| FiensG | 8/10 | 6387 days | 28% |
| Joel | 7/10 | 6388 days | 26% |
| Robert | 4/10 | 6392 days | 12% |
| Chris | 8/10 | 6393 days | 28% |
| JuliaG1 | 7/10 | 6401 days | 26% |
| DavidMurray | 7/10 | 6402 days | 26% |
| AndrewF78 | 6/10 | 6404 days | 22% |
| Sarah | 8/10 | 6405 days | 28% |
| Carmel | 7/10 | 6409 days | 26% |
| marcusr | 7/10 | 6410 days | 26% |
| BethanD | 9/10 | 6415 days | 29% |
| ClaudiaK | 1/10 | 6417 days | 0% |
| Miguel | 3/10 | 6419 days | 7% |
| Ko | 8/10 | 6433 days | 28% |
| Nienhaus | 7/10 | 6436 days | 26% |
| Kern | 3/10 | 6453 days | 7% |
| Stephanie | 9/10 | 6468 days | 29% |
| Miha | 10/10 | 6473 days | 29% |
| Jacinta | 3/10 | 6499 days | 7% |
| Lara | 7/10 | 6546 days | 26% |
| Katie | 7/10 | 6564 days | 26% |
| Daniela Bell | 10/10 | 6575 days | 29% |
| Jenny | 7/10 | 6579 days | 26% |
| maria d | 10/10 | 6611 days | 29% |
| fgregory | 3/10 | 6631 days | 7% |
| woodolly | 3/10 | 6712 days | 7% |
| Christian | 6/10 | 6755 days | 22% |
| Alexandra Vogeli | 8/10 | 6755 days | 28% |
| Richard Steward | 9/10 | 6765 days | 29% |
| boukje | 8/10 | 6769 days | 28% |
| Stephanie | 10/10 | 6780 days | 29% |
| Carla | 8/10 | 6780 days | 28% |
| Melissa Steedman | 7/10 | 6807 days | 26% |
| Vanessa Brennan | 5/10 | 6807 days | 17% |
| Maria | 8/10 | 6811 days | 28% |
| Gerber Liselotte | 7/10 | 6842 days | 26% |
| Manuel | 5/10 | 6857 days | 17% |
| Tom Clements | 6/10 | 6858 days | 22% |
| Sally Walker | 9/10 | 6885 days | 29% |
| Bridgy | 10/10 | 7058 days | 29% |
| andrew julie | 8/10 | 7092 days | 28% |
| Bas Marieke | 8/10 | 7109 days | 28% |
| Richhouse | 8/10 | 7114 days | 28% |
| Dennis | 7/10 | 7115 days | 26% |
| Rietveld | 6/10 | 7126 days | 22% |
| Susanne | 5/10 | 7131 days | 17% |
| Lucy | 7/10 | 7131 days | 26% |
| Ralph | 7/10 | 7133 days | 26% |
| Nissa | 7/10 | 7133 days | 26% |
| Ash Sturm | 6/10 | 7250 days | 22% |
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
-2.74% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 88 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 | -2.70% |
| 198 | -2.71% |
| 199 | -2.73% |
| 200 | -2.74% |
| 201 | -2.75% |
| 202 | -2.77% |
| 203 | -2.78% |
| … | … |
Balancing Adjustment
7.49% 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.