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 Waitomo Glowworm Caves.

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

Waitomo Glowworm Caves

Valid Reviews

288 Valid Reviews

The Waitomo Glowworm Caves experience has a total of 289 reviews. There are 288 valid reviews that are included when calculating the ranking score and 1 invalid review 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 288 valid reviews:

Rating Count Percentage
10/10 36
13%
9/10 52
18%
8/10 81
28%
7/10 64
22%
6/10 22
8%
5/10 13
5%
4/10 8
3%
3/10 5
2%
2/10 4
1%
1/10 3
1%

75.66% Average

The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.66% and is based on 288 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

263 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 288 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 263 face-to-face reviews:

Rating Count Percentage
10/10 29
11%
9/10 49
19%
8/10 76
29%
7/10 57
22%
6/10 21
8%
5/10 13
5%
4/10 7
3%
3/10 5
2%
2/10 4
2%
1/10 2
1%

75.36% Average

The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

76.36%

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
ros fraser 4/10 1056 days 85%
wynden 1/10 1084 days 75%
Rado Hank 10/10 1171 days 100%
Lizzie Edmonds 8/10 1172 days 95%
Anis Quentin 7/10 1179 days 91%
Jeny Smolders 7/10 1183 days 91%
Oscar Petersen 8/10 1190 days 94%
Ani 9/10 1299 days 95%
Martin Murlik 8/10 1411 days 86%
Laura 9/10 1422 days 90%
Melanie Farrell 7/10 1430 days 81%
Andy 10/10 1437 days 89%
Julia Achatz 5/10 1451 days 72%
Auba Mateos 7/10 1457 days 80%
Charlotte 7/10 1457 days 80%
Isabel Zedelius 8/10 1460 days 84%
Dries 8/10 1500 days 82%
Clarissa Glaser 8/10 1501 days 82%
Alna 10/10 1506 days 86%
Holger Worner 9/10 1506 days 86%
Karlee Hormell 9/10 1515 days 86%
Alonso 9/10 1519 days 86%
Rose Guillaume 8/10 1522 days 81%
Caroline Coudray 8/10 1526 days 81%
Barbara 8/10 1526 days 81%
Leonie Brabers 7/10 1534 days 78%
Bina Johansson 10/10 1534 days 85%
Sam Staines 9/10 1538 days 85%
Erik 6/10 1541 days 71%
Nicole Signer 8/10 1548 days 80%
Sam Taylor 7/10 1552 days 77%
Vanuxem 8/10 1756 days 73%
Clara Bertomeu 10/10 1756 days 76%
Lukas Boller 9/10 1758 days 76%
Mette Elholm 7/10 1772 days 69%
Mathilde Arp 8/10 1772 days 72%
Chloe and Guillame 9/10 1776 days 76%
Andre 9/10 1778 days 75%
Doerte 10/10 1778 days 75%
Saskia Peek 9/10 1779 days 75%
Erika Tarant 8/10 1779 days 72%
Jennifer Nguyen 7/10 1780 days 69%
Julie Duvert 7/10 1780 days 69%
Dan Ramsl 4/10 1780 days 59%
Lucy Mulvin 7/10 1781 days 69%
Fine Kochling 9/10 1783 days 75%
Eberhard 9/10 1783 days 75%
Hannes 8/10 1784 days 71%
Calum Penn 9/10 1786 days 75%
Arthur Portolleau 6/10 1787 days 62%
Elisabet 10/10 1788 days 75%
Tommy Mannien 8/10 1789 days 71%
Solange Bourbeois 8/10 1792 days 71%
Talissa Missiato 10/10 1792 days 75%
Severin Knegsch 9/10 1793 days 75%
Pierre Jouffineau 10/10 1794 days 75%
Lewis Whittle 8/10 1796 days 71%
Ben and Pauline 8/10 1798 days 71%
Ann-Kathrin 7/10 1803 days 68%
Natasha Harbinson 10/10 1804 days 74%
Sebastian 2/10 1805 days 56%
Jaquein Bucholz 3/10 1805 days 57%
Chiara 7/10 1805 days 68%
Cariotta Kemper 3/10 1805 days 57%
Megan Lenox 7/10 1808 days 68%
Max Mustermann 8/10 1810 days 70%
Amy Stafford 8/10 1813 days 70%
Carl 7/10 1813 days 67%
Briony 7/10 1815 days 67%
Melanie Kronbichler 8/10 1816 days 70%
Andreas Schiefer 7/10 1817 days 67%
Veronique Kaplan 3/10 1819 days 57%
Robin Ings 6/10 1820 days 61%
Stula Vladimir 7/10 1821 days 67%
David Soukal 8/10 1821 days 70%
Olivia Aliprandi 7/10 1822 days 67%
Isabelle 2/10 1824 days 55%
Jonathan Gourmel 8/10 1824 days 70%
Mikkel Palleson 4/10 1827 days 58%
Franziska and Sabine 7/10 1828 days 67%
Chloe Guerillot 7/10 1828 days 67%
Faye Oliver 7/10 1830 days 67%
Iris Kerbler 9/10 1830 days 73%
Til Schaebitz 6/10 1831 days 61%
Elisabeth Grabner 9/10 1833 days 73%
Berith 10/10 1833 days 73%
Chris Simpson 6/10 1836 days 61%
Pekka and Jonna 9/10 1836 days 73%
Jonas Hoerning 8/10 1837 days 69%
Nils 10/10 1837 days 73%
Mark Rosema 8/10 1838 days 69%
Lisa Huber 10/10 1838 days 73%
Nicola Wiggan 9/10 1859 days 72%
Linda and Gunther 4/10 1860 days 57%
Julie 9/10 1861 days 72%
Maria Schaer 7/10 1865 days 65%
Mette and Jesper 5/10 1867 days 58%
Pierre and Alexandra 6/10 1873 days 59%
Julia Waenninger 8/10 1885 days 68%
Sarah Boettcher 9/10 1921 days 70%
Suzanne Vermeulen 6/10 1938 days 57%
Blandine Giusti 7/10 2141 days 55%
Bart Hanssen 6/10 2220 days 48%
Astrid Egesten 7/10 2272 days 50%
Jean Curry 9/10 2495 days 46%
Carla Oyarzun 1/10 2499 days 34%
Philippe Chiasson 9/10 2505 days 46%
Helma Druyken 4/10 2515 days 36%
Florian Guttler 7/10 2518 days 41%
Casandra Prunica 8/10 2519 days 43%
Lauren Hedley 7/10 2519 days 41%
Janina Zwerver 8/10 2519 days 43%
Marieke Feyteres 4/10 2523 days 36%
van Linda Werner 5/10 2523 days 37%
Philip Donachie 7/10 2533 days 41%
Luisa Bach 8/10 2533 days 43%
Kristina 7/10 2535 days 41%
Eugen Lehner 6/10 2536 days 37%
Manuel Bach 7/10 2536 days 41%
Matthias Freiling 2/10 2543 days 33%
Debora Grusler 6/10 2546 days 37%
Andreas Brodhaeker 8/10 2559 days 42%
Renee van der Syde 7/10 2560 days 40%
Martha Horst 8/10 2560 days 42%
Roland Beer 7/10 2564 days 40%
Johanna Bak 4/10 2564 days 34%
Lior Bakski 9/10 2574 days 43%
Bet 9/10 2575 days 43%
Memain 8/10 2848 days 31%
Konza 7/10 2849 days 29%
Steen Rausmussen 8/10 2880 days 29%
David Restell 10/10 2910 days 30%
Christina Rodewald 9/10 2915 days 29%
Hanneke P 7/10 2941 days 26%
Kohler 9/10 2961 days 28%
Alexandra van den Brack 6/10 2969 days 23%
Paul Lawrence 9/10 2970 days 27%
Abby Rushmer 7/10 2971 days 25%
Stephan Olivier 7/10 2976 days 25%
Stephan Olivier 7/10 2976 days 25%
Faassen 8/10 2980 days 25%
Julie Lamart 8/10 2981 days 25%
Adrian Weidell 5/10 3177 days 15%
Jonathan Tuthill 9/10 3232 days 17%
A Ormsby 10/10 3244 days 16%
Gillian Rowe 10/10 3257 days 16%
Ryan Pynappels 8/10 3258 days 15%
Peter Dellen 8/10 3259 days 15%
Jorg Steffens 8/10 3259 days 15%
Danielle & Jobbe 9/10 3261 days 15%
Christina 6/10 3262 days 13%
Jop Veldhuis 7/10 3262 days 14%
Paul Weidenfeld 8/10 3263 days 15%
Sophie Dorrepaal 7/10 3263 days 14%
Fannette Peyreplane 5/10 3264 days 12%
Norm Cooper 7/10 3268 days 14%
Gloria, Rose & An 8/10 3268 days 14%
A Sorg 10/10 3268 days 15%
Samplonius 5/10 3271 days 12%
Petra 10/10 3271 days 15%
Bethany Hamilton 8/10 3275 days 14%
suffolkhouse69 9/10 3276 days 15%
a a 8/10 3307 days 13%
Julia Balionis 7/10 3321 days 12%
Julia Hartman 3/10 3322 days 10%
Fabienne Indergand 7/10 3342 days 11%
Waldemar Schuler 9/10 3354 days 12%
pepette31 7/10 3429 days 8%
Craig Hathaway 9/10 3581 days 2%
Stephane Lebel 9/10 3586 days 2%
Rens Hemselmans 7/10 3599 days 2%
Isabell 10/10 3601 days 2%
Holly Cave 5/10 3601 days 1%
J Palmer 6/10 3605 days 1%
Liz & Jim 10/10 3607 days 1%
Edgar & Marilyn Berry 9/10 3609 days 1%
Simon Vickers 2/10 3612 days 1%
Leslie 8/10 3625 days 1%
Jean-Francois Guilbault 8/10 3626 days 1%
Selina Mueller 7/10 3627 days 1%
Tamlin Barton 3/10 3628 days 0%
Cara Dungay 8/10 3629 days 1%
Bottcher 10/10 3629 days 1%
Alexandra 10/10 3630 days 1%
Philipp Rau 7/10 3632 days 0%
Dan Aldridge 9/10 3634 days 0%
John Allen 8/10 3636 days 0%
Curtis Penner 8/10 3636 days 0%
Brandt 8/10 3638 days 0%
Nadia Husain 5/10 3641 days 0%
T J Andrews 6/10 3657 days 17%
Charli Skinner 7/10 3908 days 19%
Carl_Larsen 10/10 3917 days 20%
Susan & Richard 10/10 3978 days 20%
Rik 9/10 3979 days 20%
Jonathan Martin 7/10 3981 days 19%
Gunda G 9/10 3986 days 20%
Aaron 8/10 3988 days 19%
Will Jemma 6/10 3991 days 17%
Christen Hans 10/10 3992 days 20%
Monica and Danie. 7/10 4000 days 19%
Stephen 5/10 4002 days 16%
Susan 10/10 4002 days 20%
snodge 8/10 4006 days 19%
Bo Moenstead 9/10 4015 days 20%
Alain Deslandres 8/10 4019 days 19%
Jakob Jurgen 10/10 4020 days 20%
EA Anders 8/10 4023 days 19%
Helen and Hans Walser 1/10 4026 days 15%
kevinp 8/10 4049 days 19%
warrenp 9/10 4053 days 20%
braunweiler 9/10 4057 days 20%
pimn 9/10 4062 days 20%
asiacritics 7/10 4068 days 19%
Chris Mackamul 8/10 4075 days 19%
Debbie Rathbone 10/10 4075 days 20%
Lisette X 9/10 4076 days 20%
Martin 10/10 4078 days 20%
Thomas Willi 10/10 4078 days 20%
Elodie 7/10 4079 days 19%
richardh 7/10 4193 days 19%
trvlbug 8/10 4221 days 19%
glennandjen 10/10 4282 days 20%
BryonyS 9/10 4300 days 20%
Marion 9/10 4316 days 20%
Mikey 7/10 4317 days 19%
Richard Komzik 6/10 4318 days 17%
Michael Walsall 10/10 4322 days 20%
Anna 8/10 4336 days 19%
Abigail 7/10 4336 days 19%
lannie 7/10 4346 days 19%
SimonR 8/10 4346 days 19%
SonjaG 7/10 4346 days 19%
Chris 8/10 4352 days 19%
AurelieD 8/10 4359 days 19%
Yunker 10/10 4360 days 20%
Andrew 8/10 4363 days 19%
Erin 9/10 4363 days 20%
Christopher Gallaga 8/10 4368 days 19%
Amy 10/10 4374 days 20%
Shona 8/10 4374 days 19%
plumbaum 9/10 4377 days 20%
Sandra 10/10 4384 days 20%
Evangelista 8/10 4384 days 19%
Oliver 5/10 4386 days 16%
Kat 9/10 4416 days 20%
Lisa 8/10 4444 days 19%
siobhan 8/10 4446 days 19%
Alice 8/10 4446 days 19%
NORTZ 7/10 4474 days 19%
Stefan 8/10 4476 days 19%
Hugh Trenchard 9/10 4492 days 20%
Niamh 4/10 4499 days 16%
Jenny 9/10 4523 days 20%
Louise 8/10 4532 days 19%
Peddy 10/10 4541 days 20%
Katie Wise 8/10 4545 days 19%
Thomas Bachmann 8/10 4560 days 19%
Daniala 8/10 4579 days 19%
Tom Ben 9/10 4683 days 20%
Sarah Maudsley 8/10 4698 days 19%
Alan Bellerby 8/10 4698 days 19%
Tina Daly 5/10 4704 days 16%
John Woodrow 8/10 4713 days 19%
Ernst Seter 9/10 4713 days 20%
Jim Curley 7/10 4724 days 19%
Daniel 7/10 4725 days 19%
Marc Hertogs 7/10 4728 days 19%
Laura Sutton 5/10 4752 days 16%
Jeroen 5/10 4754 days 16%
Mum! 6/10 4754 days 17%
Gail 9/10 4758 days 20%
Heike Julia 6/10 4759 days 17%
Lanni 8/10 4759 days 19%
Amanda Finger 7/10 4760 days 19%
Desiree Muri 7/10 4760 days 19%
Jan Grzejik 8/10 4787 days 19%
Wouter Ewalts 8/10 4794 days 19%
Matilde 6/10 4802 days 17%
Kim 6/10 4999 days 17%
Gillian 8/10 5041 days 19%
Denise Nick 6/10 5051 days 17%
ranker_110 8/10 5070 days 19%
Jasper 7/10 5077 days 19%
Mary 8/10 5077 days 19%
Lucy 6/10 5077 days 17%
Lukas 8/10 5088 days 19%
Hanna 7/10 5090 days 19%

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 Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.10% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 47 days. However the Waitomo Glowworm Caves 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 Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.04%
198 -4.06%
199 -4.08%
200 -4.10%
201 -4.12%
202 -4.14%
203 -4.16%

Final Ranking Score

72%

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.