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

54.22%

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 2/10 386 days 57.29 100%
Inez Cavallaro 6/10 447 days 56.72 99%
John Farley 10/10 1048 days true 5.35 9%
Frank Fabian 8/10 1099 days true 4.74 8%
Les Hendy 8/10 1125 days true 4.69 8%
Lea Celerier 8/10 1126 days true 4.69 8%
Jane Scott 9/10 1176 days 4.84 8%
Michelle Smit 8/10 1238 days 4.48 8%
Jan Berendsen 5/10 1334 days true 3.67 6%
Chandra Macraigne 6/10 1369 days true 3.7 6%
Nanna Torp 3/10 1371 days true 3.43 6%
Karel 7/10 2108 days true 2.75 5%
Dick Kooij 7/10 2529 days true 2.0 3%
Huw Davies 8/10 2797 days true 1.59 3%
Goran Backlund 7/10 2807 days true 1.5 3%
Marc Schmiedily 3/10 2808 days true 1.27 2%
Martin Beuker 8/10 2828 days true 1.53 3%
Richard Harvey 8/10 2831 days true 1.52 3%
Mark Bogton 5/10 2831 days true 1.3 2%
Thomas 5/10 2833 days true 1.3 2%
Kimberley Mills 8/10 2838 days true 1.51 3%
Scott Simpson 5/10 2839 days true 1.29 2%
Luis Valenzuela 5/10 2844 days true 1.28 2%
Petra 8/10 2846 days true 1.49 3%
David Blundell 7/10 2846 days true 1.43 2%
Lucie Rutherfurd 9/10 2849 days true 1.57 3%
Peter W. 3/10 2913 days 1.11 2%
Steve Neilson 8/10 2920 days true 1.36 2%
Erik Folkersen 4/10 2927 days true 1.12 2%
Mark de Boer 8/10 2933 days true 1.33 2%
Tina 9/10 2943 days true 1.38 2%
Jacquimd13 10/10 3066 days 1.14 2%
Natascha Rachel 7/10 3133 days true 0.92 2%
A Jones 9/10 3160 days true 0.96 2%
Walker 5/10 3160 days true 0.78 1%
Lindsey Clough 2/10 3166 days true 0.71 1%
Natalie Maguire 5/10 3171 days true 0.76 1%
Andreas Rath 6/10 3173 days true 0.77 1%
Peter & Angela Brown 10/10 3178 days true 0.92 2%
Chris Ashton 7/10 3182 days true 0.83 1%
Kees Stigter 7/10 3184 days true 0.83 1%
Diete Rokosch 9/10 3189 days true 0.9 2%
Brian 10/10 3191 days true 0.9 2%
Ronald Lippett 8/10 3193 days true 0.85 1%
Ines 8/10 3203 days true 0.83 1%
Julian Seizinger 2/10 3203 days true 0.66 1%
Ann Thompson 9/10 3204 days true 0.87 2%
Luise Jaeger 10/10 3206 days true 0.87 2%
Eva Stauderova 6/10 3207 days true 0.72 1%
Marianne Astorp 8/10 3207 days true 0.82 1%
Henrik Petersen 7/10 3209 days true 0.79 1%
Michael Eck 8/10 3209 days true 0.82 1%
Lili 8/10 3209 days true 0.82 1%
Florian 7/10 3209 days true 0.79 1%
willsworthy 5/10 3308 days 0.54 1%
craigy 5/10 3400 days 0.4 1%
BigSis 7/10 3400 days 0.45 1%
Russ Turner 2/10 3539 days true 0.16 0%
Andy 6/10 3543 days true 0.17 0%
Michael Egli 9/10 3544 days true 0.21 0%
Alan & Lorna 3/10 3546 days true 0.16 0%
Venot 7/10 3556 days true 0.17 0%
Roger Trusedale 5/10 3563 days true 0.14 0%
David Rich 6/10 3566 days true 0.14 0%
Mathias Skov 4/10 3567 days true 0.13 0%
Nikki Wood 6/10 3575 days true 0.12 0%
Mike Kirchner 2/10 3577 days true 0.11 0%
Wolfgang G 10/10 3587 days true 0.12 0%
Bo Moenstead 8/10 3590 days true 0.11 0%
cees juffermans 8/10 3594 days true 0.1 0%
Camenzind 7/10 3601 days true 0.09 0%
Angela Stringer 4/10 3612 days 0.06 0%
blokzyl 8/10 3632 days true 0.03 0%
aages 9/10 3636 days true 0.03 0%
Emma Coltman 5/10 3645 days true 0.01 0%
Helen Pet 9/10 3651 days true 0.0 0%
nancyburns 7/10 3673 days 0.0 0%
Von 5/10 3673 days 0.0 0%
rita 7/10 3752 days true 0.0 0%
Jess Thompson 10/10 3765 days 0.0 0%
Boxa Smith 10/10 3765 days 0.0 0%
LowerD 9/10 3881 days true 0.0 0%
Sofie 8/10 3887 days true 0.0 0%
Arjan Muis 7/10 3889 days true 0.0 0%
Marion 10/10 3891 days true 0.0 0%
Kim 6/10 3891 days true 0.0 0%
MichaelS1 3/10 3903 days true 0.0 0%
ClodaghM 8/10 3904 days true 0.0 0%
Andrew Wilson 9/10 3904 days true 0.0 0%
FiensG 8/10 3906 days true 0.0 0%
Joel 7/10 3907 days true 0.0 0%
Robert 4/10 3910 days true 0.0 0%
Chris 8/10 3911 days true 0.0 0%
JuliaG1 7/10 3920 days true 0.0 0%
DavidMurray 7/10 3921 days true 0.0 0%
AndrewF78 6/10 3923 days true 0.0 0%
Sarah 8/10 3923 days true 0.0 0%
Carmel 7/10 3927 days true 0.0 0%
marcusr 7/10 3928 days true 0.0 0%
BethanD 9/10 3934 days true 0.0 0%
ClaudiaK 1/10 3936 days true 0.0 0%
Miguel 3/10 3937 days true 0.0 0%
Ko 8/10 3951 days true 0.0 0%
Nienhaus 7/10 3954 days true 0.0 0%
Kern 3/10 3971 days true 0.0 0%
Stephanie 9/10 3987 days true 0.0 0%
Miha 10/10 3991 days true 0.0 0%
Jacinta 3/10 4017 days true 0.0 0%
Lara 7/10 4064 days true 0.0 0%
Katie 7/10 4082 days true 0.0 0%
Daniela Bell 10/10 4093 days true 0.0 0%
Jenny 7/10 4097 days true 0.0 0%
maria d 10/10 4129 days 0.0 0%
fgregory 3/10 4149 days 0.0 0%
woodolly 3/10 4230 days 0.0 0%
Christian 6/10 4274 days true 0.0 0%
Alexandra Vogeli 8/10 4274 days true 0.0 0%
Richard Steward 9/10 4284 days true 0.0 0%
boukje 8/10 4287 days 0.0 0%
Stephanie 10/10 4299 days true 0.0 0%
Carla 8/10 4299 days true 0.0 0%
Melissa Steedman 7/10 4326 days true 0.0 0%
Vanessa Brennan 5/10 4326 days true 0.0 0%
Maria 8/10 4330 days true 0.0 0%
Gerber Liselotte 7/10 4361 days true 0.0 0%
Manuel 5/10 4376 days true 0.0 0%
Tom Clements 6/10 4377 days true 0.0 0%
Sally Walker 9/10 4404 days 0.0 0%
Bridgy 10/10 4577 days true 0.0 0%
andrew julie 8/10 4611 days true 0.0 0%
Bas Marieke 8/10 4628 days true 0.0 0%
Richhouse 8/10 4633 days true 0.0 0%
Dennis 7/10 4634 days true 0.0 0%
Rietveld 6/10 4645 days true 0.0 0%
Susanne 5/10 4650 days true 0.0 0%
Lucy 7/10 4650 days true 0.0 0%
Ralph 7/10 4652 days true 0.0 0%
Nissa 7/10 4652 days true 0.0 0%
Ash Sturm 6/10 4769 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

50%

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.