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 Caveworld.

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 Caveworld

Valid Reviews

74 Valid Reviews

The Waitomo Caveworld experience has a total of 74 valid reviews. There are no 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 74 valid reviews:

Rating Count Percentage
10/10 15
20%
9/10 18
24%
8/10 20
27%
7/10 10
14%
6/10 8
11%
5/10 2
3%
4/10 0
0%
3/10 0
0%
2/10 1
1%
1/10 0
0%

81.35% Average

The raw data average (mean) for all the Waitomo Caveworld valid reviews is 81.35% and is based on 74 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

68 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 74 valid reviews, the experience has 68 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 68 face-to-face reviews:

Rating Count Percentage
10/10 15
22%
9/10 16
24%
8/10 19
28%
7/10 9
13%
6/10 7
10%
5/10 2
3%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

82.50% Average

The raw data average (mean) for all the Waitomo Caveworld face-to-face reviews is 82.50% and is based on 68 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

84.07%

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
Cassandra Geyer 9/10 1764 days 100%
Mijke Boesten 8/10 1819 days 92%
Anders Hauke 8/10 1820 days 92%
Lengxi 8/10 1820 days 92%
Arvid Hellquist 9/10 2192 days 77%
Steven Lotrian 9/10 2539 days 59%
Alex Artigues 10/10 2587 days 56%
Serge Garcin 10/10 2587 days 56%
Tourist101 2/10 3041 days 24%
kayburns 9/10 3101 days 29%
Alison Rosser 7/10 3278 days 18%
Helen & Laurence 8/10 3353 days 15%
Kris Gijbels 8/10 3599 days 2%
Mike 6/10 3637 days 0%
Stefan Morris 8/10 3640 days 0%
Jessie Currie 7/10 3640 days 0%
Barry 9/10 3642 days 0%
Melanie Armbruster 6/10 3645 days 0%
Stefanie Halbrock 5/10 3645 days 0%
Jim Thomsen 8/10 3646 days 0%
Kate Thomsen 8/10 3646 days 0%
Denecke Thorsten 7/10 3995 days 25%
M and H Lunn 8/10 3995 days 26%
Henrik Plichta 9/10 3995 days 27%
Michael 10/10 3996 days 27%
San Ahuia 5/10 4005 days 22%
Amer 10/10 4011 days 27%
Coby Aalbrecht 7/10 4013 days 25%
Andreas Sterki 8/10 4084 days 26%
X Otte 7/10 4084 days 25%
Hansjoerg Ehrmann 9/10 4087 days 27%
Sophie Keate 8/10 4203 days 26%
Catherine Smiles 10/10 4233 days 27%
Martina 6/10 4320 days 22%
IanM 8/10 4320 days 26%
MarielR 9/10 4338 days 27%
Joel 9/10 4340 days 27%
Brigette Guikens 10/10 4341 days 27%
Keith 7/10 4344 days 25%
JuliaG1 8/10 4353 days 26%
DavidMurray 8/10 4354 days 26%
RosC 6/10 4355 days 22%
AndrewF78 9/10 4356 days 27%
EmmaB1 9/10 4366 days 27%
ClaudiaK 10/10 4369 days 27%
ArnarF 9/10 4379 days 27%
SonjaS 10/10 4379 days 27%
Burkhalter 9/10 4391 days 27%
Rene 7/10 4392 days 25%
Paula 8/10 4445 days 26%
Teresa 10/10 4451 days 27%
Kay 10/10 4499 days 27%
Jimmy 9/10 4517 days 27%
Anna 10/10 4517 days 27%
sabine 10/10 4517 days 27%
Elisabeth 10/10 4526 days 27%
Terneal King 7/10 4558 days 25%
Helen 6/10 4568 days 22%
Nicnac 8/10 4685 days 26%
Mark 10/10 4690 days 27%
Joanne M 7/10 4696 days 25%
Anna 10/10 4697 days 27%
Leila 9/10 4700 days 27%
Adam Richards 8/10 4700 days 26%
Lena1 9/10 4720 days 27%
Stephanie 9/10 4732 days 27%
Hanna 6/10 4733 days 22%
Maree 8/10 4733 days 26%
Orlaith 9/10 4733 days 27%
Lisa 8/10 4733 days 26%
Stephanie Jones 6/10 4760 days 22%
Paula Smith 7/10 4763 days 25%
Bridgy 8/10 5009 days 26%
JanKovar 6/10 5037 days 22%

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 Caveworld experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.13% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 49 days. However the Waitomo Caveworld 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 Caveworld experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.07%
198 -4.09%
199 -4.11%
200 -4.13%
201 -4.15%
202 -4.17%
203 -4.19%

Final Ranking Score

80%

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.