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

54.64%

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 2/10 473 days 48.41 100%
Inez Cavallaro 6/10 534 days 45.5 94%
John Farley 10/10 1135 days true 4.92 10%
Frank Fabian 8/10 1186 days true 4.58 9%
Les Hendy 8/10 1212 days true 4.53 9%
Lea Celerier 8/10 1213 days true 4.53 9%
Jane Scott 9/10 1264 days 4.67 10%
Michelle Smit 8/10 1326 days 4.32 9%
Jan Berendsen 5/10 1421 days true 3.53 7%
Chandra Macraigne 6/10 1456 days true 3.56 7%
Nanna Torp 3/10 1458 days true 3.3 7%
Karel 7/10 2195 days true 2.59 5%
Dick Kooij 7/10 2616 days true 1.84 4%
Huw Davies 8/10 2884 days true 1.42 3%
Goran Backlund 7/10 2894 days true 1.35 3%
Marc Schmiedily 3/10 2895 days true 1.14 2%
Martin Beuker 8/10 2915 days true 1.37 3%
Richard Harvey 8/10 2918 days true 1.36 3%
Mark Bogton 5/10 2918 days true 1.16 2%
Thomas 5/10 2920 days true 1.16 2%
Kimberley Mills 8/10 2925 days true 1.35 3%
Scott Simpson 5/10 2926 days true 1.15 2%
Luis Valenzuela 5/10 2931 days true 1.14 2%
Petra 8/10 2933 days true 1.33 3%
David Blundell 7/10 2933 days true 1.28 3%
Lucie Rutherfurd 9/10 2936 days true 1.4 3%
Peter W. 3/10 3000 days 0.98 2%
Steve Neilson 8/10 3007 days true 1.2 2%
Erik Folkersen 4/10 3014 days true 0.98 2%
Mark de Boer 8/10 3020 days true 1.17 2%
Tina 9/10 3030 days true 1.21 3%
Jacquimd13 10/10 3153 days 0.97 2%
Natascha Rachel 7/10 3220 days true 0.77 2%
A Jones 9/10 3247 days true 0.79 2%
Walker 5/10 3247 days true 0.64 1%
Lindsey Clough 2/10 3253 days true 0.58 1%
Natalie Maguire 5/10 3258 days true 0.62 1%
Andreas Rath 6/10 3260 days true 0.63 1%
Peter & Angela Brown 10/10 3265 days true 0.75 2%
Chris Ashton 7/10 3269 days true 0.68 1%
Kees Stigter 7/10 3271 days true 0.67 1%
Diete Rokosch 9/10 3276 days true 0.73 2%
Brian 10/10 3278 days true 0.73 2%
Ronald Lippett 8/10 3280 days true 0.69 1%
Ines 8/10 3290 days true 0.67 1%
Julian Seizinger 2/10 3290 days true 0.53 1%
Ann Thompson 9/10 3291 days true 0.7 1%
Luise Jaeger 10/10 3293 days true 0.7 1%
Eva Stauderova 6/10 3294 days true 0.58 1%
Marianne Astorp 8/10 3294 days true 0.66 1%
Henrik Petersen 7/10 3296 days true 0.63 1%
Michael Eck 8/10 3296 days true 0.66 1%
Lili 8/10 3296 days true 0.66 1%
Florian 7/10 3296 days true 0.63 1%
willsworthy 5/10 3395 days 0.4 1%
craigy 5/10 3487 days 0.26 1%
BigSis 7/10 3487 days 0.29 1%
Russ Turner 2/10 3626 days true 0.04 0%
Andy 6/10 3630 days true 0.03 0%
Michael Egli 9/10 3631 days true 0.04 0%
Alan & Lorna 3/10 3633 days true 0.03 0%
Venot 7/10 3643 days true 0.01 0%
Roger Trusedale 5/10 3650 days true 0.0 0%
David Rich 6/10 3653 days true 0.0 0%
Mathias Skov 4/10 3654 days true 0.0 0%
Nikki Wood 6/10 3662 days true 0.0 0%
Mike Kirchner 2/10 3664 days true 0.0 0%
Wolfgang G 10/10 3674 days true 0.0 0%
Bo Moenstead 8/10 3677 days true 0.0 0%
cees juffermans 8/10 3681 days true 0.0 0%
Camenzind 7/10 3688 days true 0.0 0%
Angela Stringer 4/10 3699 days 0.0 0%
blokzyl 8/10 3719 days true 0.0 0%
aages 9/10 3723 days true 0.0 0%
Emma Coltman 5/10 3732 days true 0.0 0%
Helen Pet 9/10 3738 days true 0.0 0%
nancyburns 7/10 3760 days 0.0 0%
Von 5/10 3760 days 0.0 0%
rita 7/10 3839 days true 0.0 0%
Jess Thompson 10/10 3852 days 0.0 0%
Boxa Smith 10/10 3852 days 0.0 0%
LowerD 9/10 3968 days true 0.0 0%
Sofie 8/10 3974 days true 0.0 0%
Arjan Muis 7/10 3976 days true 0.0 0%
Marion 10/10 3978 days true 0.0 0%
Kim 6/10 3978 days true 0.0 0%
MichaelS1 3/10 3990 days true 0.0 0%
ClodaghM 8/10 3991 days true 0.0 0%
Andrew Wilson 9/10 3991 days true 0.0 0%
FiensG 8/10 3993 days true 0.0 0%
Joel 7/10 3994 days true 0.0 0%
Robert 4/10 3998 days true 0.0 0%
Chris 8/10 3998 days true 0.0 0%
JuliaG1 7/10 4007 days true 0.0 0%
DavidMurray 7/10 4008 days true 0.0 0%
AndrewF78 6/10 4010 days true 0.0 0%
Sarah 8/10 4011 days true 0.0 0%
Carmel 7/10 4014 days true 0.0 0%
marcusr 7/10 4016 days true 0.0 0%
BethanD 9/10 4021 days true 0.0 0%
ClaudiaK 1/10 4023 days true 0.0 0%
Miguel 3/10 4025 days true 0.0 0%
Ko 8/10 4039 days true 0.0 0%
Nienhaus 7/10 4041 days true 0.0 0%
Kern 3/10 4059 days true 0.0 0%
Stephanie 9/10 4074 days true 0.0 0%
Miha 10/10 4079 days true 0.0 0%
Jacinta 3/10 4105 days true 0.0 0%
Lara 7/10 4152 days true 0.0 0%
Katie 7/10 4170 days true 0.0 0%
Daniela Bell 10/10 4181 days true 0.0 0%
Jenny 7/10 4185 days true 0.0 0%
maria d 10/10 4217 days 0.0 0%
fgregory 3/10 4237 days 0.0 0%
woodolly 3/10 4318 days 0.0 0%
Christian 6/10 4361 days true 0.0 0%
Alexandra Vogeli 8/10 4361 days true 0.0 0%
Richard Steward 9/10 4371 days true 0.0 0%
boukje 8/10 4374 days 0.0 0%
Stephanie 10/10 4386 days true 0.0 0%
Carla 8/10 4386 days true 0.0 0%
Melissa Steedman 7/10 4413 days true 0.0 0%
Vanessa Brennan 5/10 4413 days true 0.0 0%
Maria 8/10 4417 days true 0.0 0%
Gerber Liselotte 7/10 4448 days true 0.0 0%
Manuel 5/10 4463 days true 0.0 0%
Tom Clements 6/10 4464 days true 0.0 0%
Sally Walker 9/10 4491 days 0.0 0%
Bridgy 10/10 4664 days true 0.0 0%
andrew julie 8/10 4698 days true 0.0 0%
Bas Marieke 8/10 4715 days true 0.0 0%
Richhouse 8/10 4720 days true 0.0 0%
Dennis 7/10 4721 days true 0.0 0%
Rietveld 6/10 4732 days true 0.0 0%
Susanne 5/10 4737 days true 0.0 0%
Lucy 7/10 4737 days true 0.0 0%
Ralph 7/10 4739 days true 0.0 0%
Nissa 7/10 4739 days true 0.0 0%
Ash Sturm 6/10 4856 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.