Ranking Score Explained

Hi there, 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.

Nick Morrison's avatar

Nick Morrison

Rankers owner

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

55.17%

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 Face-to-Face Weight Relative Weight
Melissa S 2/10 521 days 42.74 100%
Inez Cavallaro 6/10 582 days 38.76 91%
John Farley 10/10 1183 days true 4.83 11%
Frank Fabian 8/10 1234 days true 4.49 11%
Les Hendy 8/10 1260 days true 4.44 10%
Lea Celerier 8/10 1261 days true 4.44 10%
Jane Scott 9/10 1311 days 4.58 11%
Michelle Smit 8/10 1373 days 4.23 10%
Jan Berendsen 5/10 1469 days true 3.46 8%
Chandra Macraigne 6/10 1504 days true 3.49 8%
Nanna Torp 3/10 1506 days true 3.23 8%
Karel 7/10 2243 days true 2.51 6%
Dick Kooij 7/10 2664 days true 1.76 4%
Huw Davies 8/10 2932 days true 1.33 3%
Goran Backlund 7/10 2942 days true 1.26 3%
Marc Schmiedily 3/10 2943 days true 1.07 2%
Martin Beuker 8/10 2963 days true 1.28 3%
Richard Harvey 8/10 2966 days true 1.27 3%
Mark Bogton 5/10 2966 days true 1.08 3%
Thomas 5/10 2968 days true 1.08 3%
Kimberley Mills 8/10 2973 days true 1.26 3%
Scott Simpson 5/10 2974 days true 1.07 3%
Luis Valenzuela 5/10 2979 days true 1.06 2%
Petra 8/10 2981 days true 1.24 3%
David Blundell 7/10 2981 days true 1.19 3%
Lucie Rutherfurd 9/10 2984 days true 1.3 3%
Peter W. 3/10 3048 days 0.91 2%
Steve Neilson 8/10 3055 days true 1.11 3%
Erik Folkersen 4/10 3062 days true 0.91 2%
Mark de Boer 8/10 3068 days true 1.08 3%
Tina 9/10 3078 days true 1.12 3%
Jacquimd13 10/10 3201 days 0.88 2%
Natascha Rachel 7/10 3268 days true 0.68 2%
A Jones 9/10 3295 days true 0.69 2%
Walker 5/10 3295 days true 0.56 1%
Lindsey Clough 2/10 3301 days true 0.51 1%
Natalie Maguire 5/10 3306 days true 0.55 1%
Andreas Rath 6/10 3308 days true 0.56 1%
Peter & Angela Brown 10/10 3313 days true 0.66 2%
Chris Ashton 7/10 3317 days true 0.59 1%
Kees Stigter 7/10 3319 days true 0.59 1%
Diete Rokosch 9/10 3324 days true 0.64 1%
Brian 10/10 3326 days true 0.63 1%
Ronald Lippett 8/10 3328 days true 0.6 1%
Ines 8/10 3338 days true 0.58 1%
Julian Seizinger 2/10 3338 days true 0.46 1%
Ann Thompson 9/10 3339 days true 0.61 1%
Luise Jaeger 10/10 3341 days true 0.6 1%
Eva Stauderova 6/10 3342 days true 0.5 1%
Marianne Astorp 8/10 3342 days true 0.57 1%
Henrik Petersen 7/10 3344 days true 0.54 1%
Michael Eck 8/10 3344 days true 0.57 1%
Lili 8/10 3344 days true 0.57 1%
Florian 7/10 3344 days true 0.54 1%
willsworthy 5/10 3443 days 0.33 1%
craigy 5/10 3535 days 0.18 0%
BigSis 7/10 3535 days 0.2 0%
Russ Turner 2/10 3674 days true 0.0 0%
Andy 6/10 3678 days true 0.0 0%
Michael Egli 9/10 3679 days true 0.0 0%
Alan & Lorna 3/10 3681 days true 0.0 0%
Venot 7/10 3691 days true 0.0 0%
Roger Trusedale 5/10 3698 days true 0.0 0%
David Rich 6/10 3701 days true 0.0 0%
Mathias Skov 4/10 3702 days true 0.0 0%
Nikki Wood 6/10 3710 days true 0.0 0%
Mike Kirchner 2/10 3712 days true 0.0 0%
Wolfgang G 10/10 3722 days true 0.0 0%
Bo Moenstead 8/10 3725 days true 0.0 0%
cees juffermans 8/10 3729 days true 0.0 0%
Camenzind 7/10 3736 days true 0.0 0%
Angela Stringer 4/10 3747 days 0.0 0%
blokzyl 8/10 3767 days true 0.0 0%
aages 9/10 3771 days true 0.0 0%
Emma Coltman 5/10 3780 days true 0.0 0%
Helen Pet 9/10 3786 days true 0.0 0%
nancyburns 7/10 3808 days 0.0 0%
Von 5/10 3808 days 0.0 0%
rita 7/10 3887 days true 0.0 0%
Jess Thompson 10/10 3900 days 0.0 0%
Boxa Smith 10/10 3900 days 0.0 0%
LowerD 9/10 4016 days true 0.0 0%
Sofie 8/10 4022 days true 0.0 0%
Arjan Muis 7/10 4024 days true 0.0 0%
Marion 10/10 4026 days true 0.0 0%
Kim 6/10 4026 days true 0.0 0%
MichaelS1 3/10 4038 days true 0.0 0%
ClodaghM 8/10 4039 days true 0.0 0%
Andrew Wilson 9/10 4039 days true 0.0 0%
FiensG 8/10 4041 days true 0.0 0%
Joel 7/10 4042 days true 0.0 0%
Robert 4/10 4045 days true 0.0 0%
Chris 8/10 4046 days true 0.0 0%
JuliaG1 7/10 4055 days true 0.0 0%
DavidMurray 7/10 4056 days true 0.0 0%
AndrewF78 6/10 4058 days true 0.0 0%
Sarah 8/10 4058 days true 0.0 0%
Carmel 7/10 4062 days true 0.0 0%
marcusr 7/10 4063 days true 0.0 0%
BethanD 9/10 4069 days true 0.0 0%
ClaudiaK 1/10 4071 days true 0.0 0%
Miguel 3/10 4072 days true 0.0 0%
Ko 8/10 4086 days true 0.0 0%
Nienhaus 7/10 4089 days true 0.0 0%
Kern 3/10 4106 days true 0.0 0%
Stephanie 9/10 4122 days true 0.0 0%
Miha 10/10 4126 days true 0.0 0%
Jacinta 3/10 4152 days true 0.0 0%
Lara 7/10 4199 days true 0.0 0%
Katie 7/10 4217 days true 0.0 0%
Daniela Bell 10/10 4228 days true 0.0 0%
Jenny 7/10 4232 days true 0.0 0%
maria d 10/10 4264 days 0.0 0%
fgregory 3/10 4284 days 0.0 0%
woodolly 3/10 4365 days 0.0 0%
Christian 6/10 4409 days true 0.0 0%
Alexandra Vogeli 8/10 4409 days true 0.0 0%
Richard Steward 9/10 4419 days true 0.0 0%
boukje 8/10 4422 days 0.0 0%
Stephanie 10/10 4434 days true 0.0 0%
Carla 8/10 4434 days true 0.0 0%
Melissa Steedman 7/10 4461 days true 0.0 0%
Vanessa Brennan 5/10 4461 days true 0.0 0%
Maria 8/10 4465 days true 0.0 0%
Gerber Liselotte 7/10 4496 days true 0.0 0%
Manuel 5/10 4511 days true 0.0 0%
Tom Clements 6/10 4512 days true 0.0 0%
Sally Walker 9/10 4539 days 0.0 0%
Bridgy 10/10 4712 days true 0.0 0%
andrew julie 8/10 4746 days true 0.0 0%
Bas Marieke 8/10 4763 days true 0.0 0%
Richhouse 8/10 4768 days true 0.0 0%
Dennis 7/10 4769 days true 0.0 0%
Rietveld 6/10 4780 days true 0.0 0%
Susanne 5/10 4785 days true 0.0 0%
Lucy 7/10 4785 days true 0.0 0%
Ralph 7/10 4787 days true 0.0 0%
Nissa 7/10 4787 days true 0.0 0%
Ash Sturm 6/10 4904 days 0.0 0%

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

-3.98% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 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 199 days.

The Hells Gate and Wai Ora Spa experience has been adjusted for 199 days. Adjustments are according to the following table.

Days Adjustment
196 -3.92%
197 -3.94%
198 -3.96%
199 -3.98%
200 -4.00%
201 -4.02%
202 -4.04%

Final Ranking Score

51%

The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.