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

56.69%

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 2/10 320 days 62.83 98%
Inez Cavallaro 6/10 381 days 63.91 100%
John Farley 10/10 982 days true 7.02 11%
Frank Fabian 8/10 1033 days true 5.33 8%
Les Hendy 8/10 1059 days true 4.95 8%
Lea Celerier 8/10 1060 days true 4.93 8%
Jane Scott 9/10 1111 days 4.97 8%
Michelle Smit 8/10 1173 days 4.62 7%
Jan Berendsen 5/10 1268 days true 3.81 6%
Chandra Macraigne 6/10 1303 days true 3.85 6%
Nanna Torp 3/10 1305 days true 3.57 6%
Karel 7/10 2042 days true 3.07 5%
Dick Kooij 7/10 2463 days true 2.42 4%
Huw Davies 8/10 2731 days true 2.09 3%
Goran Backlund 7/10 2741 days true 1.99 3%
Marc Schmiedily 3/10 2742 days true 1.68 3%
Martin Beuker 8/10 2762 days true 2.04 3%
Richard Harvey 8/10 2765 days true 2.03 3%
Mark Bogton 5/10 2765 days true 1.73 3%
Thomas 5/10 2767 days true 1.73 3%
Kimberley Mills 8/10 2772 days true 2.02 3%
Scott Simpson 5/10 2773 days true 1.72 3%
Luis Valenzuela 5/10 2778 days true 1.72 3%
Petra 8/10 2780 days true 2.01 3%
David Blundell 7/10 2780 days true 1.92 3%
Lucie Rutherfurd 9/10 2783 days true 2.11 3%
Peter W. 3/10 2847 days 1.54 2%
Steve Neilson 8/10 2854 days true 1.89 3%
Erik Folkersen 4/10 2861 days true 1.56 2%
Mark de Boer 8/10 2867 days true 1.87 3%
Tina 9/10 2877 days true 1.95 3%
Jacquimd13 10/10 3000 days 1.74 3%
Natascha Rachel 7/10 3067 days true 1.48 2%
A Jones 9/10 3094 days true 1.58 2%
Walker 5/10 3094 days true 1.28 2%
Lindsey Clough 2/10 3100 days true 1.18 2%
Natalie Maguire 5/10 3105 days true 1.26 2%
Andreas Rath 6/10 3107 days true 1.29 2%
Peter & Angela Brown 10/10 3112 days true 1.55 2%
Chris Ashton 7/10 3116 days true 1.4 2%
Kees Stigter 7/10 3118 days true 1.4 2%
Diete Rokosch 9/10 3123 days true 1.53 2%
Brian 10/10 3125 days true 1.52 2%
Ronald Lippett 8/10 3127 days true 1.44 2%
Ines 8/10 3137 days true 1.43 2%
Julian Seizinger 2/10 3137 days true 1.13 2%
Ann Thompson 9/10 3138 days true 1.5 2%
Luise Jaeger 10/10 3140 days true 1.5 2%
Eva Stauderova 6/10 3141 days true 1.24 2%
Marianne Astorp 8/10 3141 days true 1.42 2%
Henrik Petersen 7/10 3143 days true 1.36 2%
Michael Eck 8/10 3143 days true 1.42 2%
Lili 8/10 3143 days true 1.42 2%
Florian 7/10 3143 days true 1.36 2%
willsworthy 5/10 3242 days 1.07 2%
craigy 5/10 3334 days 0.94 1%
BigSis 7/10 3334 days 1.06 2%
Russ Turner 2/10 3473 days true 0.7 1%
Andy 6/10 3477 days true 0.76 1%
Michael Egli 9/10 3478 days true 0.92 1%
Alan & Lorna 3/10 3480 days true 0.71 1%
Venot 7/10 3490 days true 0.82 1%
Roger Trusedale 5/10 3497 days true 0.72 1%
David Rich 6/10 3500 days true 0.73 1%
Mathias Skov 4/10 3501 days true 0.7 1%
Nikki Wood 6/10 3509 days true 0.72 1%
Mike Kirchner 2/10 3511 days true 0.65 1%
Wolfgang G 10/10 3521 days true 0.85 1%
Bo Moenstead 8/10 3524 days true 0.8 1%
cees juffermans 8/10 3528 days true 0.79 1%
Camenzind 7/10 3535 days true 0.75 1%
Angela Stringer 4/10 3546 days 0.63 1%
blokzyl 8/10 3566 days true 0.73 1%
aages 9/10 3570 days true 0.76 1%
Emma Coltman 5/10 3579 days true 0.6 1%
Helen Pet 9/10 3585 days true 0.74 1%
nancyburns 7/10 3607 days 0.64 1%
Von 5/10 3607 days 0.57 1%
rita 7/10 3686 days true 0.51 1%
Jess Thompson 10/10 3699 days 0.54 1%
Boxa Smith 10/10 3699 days 0.54 1%
LowerD 9/10 3815 days true 0.34 1%
Sofie 8/10 3821 days true 0.32 0%
Arjan Muis 7/10 3823 days true 0.3 0%
Marion 10/10 3825 days true 0.33 1%
Kim 6/10 3825 days true 0.27 0%
MichaelS1 3/10 3837 days true 0.23 0%
ClodaghM 8/10 3838 days true 0.29 0%
Andrew Wilson 9/10 3838 days true 0.3 0%
FiensG 8/10 3840 days true 0.28 0%
Joel 7/10 3841 days true 0.27 0%
Robert 4/10 3845 days true 0.23 0%
Chris 8/10 3845 days true 0.28 0%
JuliaG1 7/10 3854 days true 0.25 0%
DavidMurray 7/10 3855 days true 0.25 0%
AndrewF78 6/10 3857 days true 0.22 0%
Sarah 8/10 3858 days true 0.26 0%
Carmel 7/10 3862 days true 0.24 0%
marcusr 7/10 3863 days true 0.24 0%
BethanD 9/10 3868 days true 0.25 0%
ClaudiaK 1/10 3870 days true 0.18 0%
Miguel 3/10 3872 days true 0.19 0%
Ko 8/10 3886 days true 0.21 0%
Nienhaus 7/10 3888 days true 0.2 0%
Kern 3/10 3906 days true 0.14 0%
Stephanie 9/10 3921 days true 0.16 0%
Miha 10/10 3926 days true 0.15 0%
Jacinta 3/10 3952 days true 0.08 0%
Lara 7/10 3999 days true 0.02 0%
Katie 7/10 4017 days true 0.0 0%
Daniela Bell 10/10 4028 days true 0.0 0%
Jenny 7/10 4032 days true 0.0 0%
maria d 10/10 4064 days 0.0 0%
fgregory 3/10 4084 days 0.0 0%
woodolly 3/10 4165 days 0.0 0%
Christian 6/10 4208 days true 0.0 0%
Alexandra Vogeli 8/10 4208 days true 0.0 0%
Richard Steward 9/10 4218 days true 0.0 0%
boukje 8/10 4222 days 0.0 0%
Stephanie 10/10 4233 days true 0.0 0%
Carla 8/10 4233 days true 0.0 0%
Melissa Steedman 7/10 4260 days true 0.0 0%
Vanessa Brennan 5/10 4260 days true 0.0 0%
Maria 8/10 4264 days true 0.0 0%
Gerber Liselotte 7/10 4295 days true 0.0 0%
Manuel 5/10 4310 days true 0.0 0%
Tom Clements 6/10 4311 days true 0.0 0%
Sally Walker 9/10 4338 days 0.0 0%
Bridgy 10/10 4511 days true 0.0 0%
andrew julie 8/10 4545 days true 0.0 0%
Bas Marieke 8/10 4562 days true 0.0 0%
Richhouse 8/10 4567 days true 0.0 0%
Dennis 7/10 4568 days true 0.0 0%
Rietveld 6/10 4579 days true 0.0 0%
Susanne 5/10 4584 days true 0.0 0%
Lucy 7/10 4584 days true 0.0 0%
Ralph 7/10 4586 days true 0.0 0%
Nissa 7/10 4586 days true 0.0 0%
Ash Sturm 6/10 4703 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

53%

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.