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

83.07%

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 1913 days 100%
Mijke Boesten 8/10 1968 days 91%
Anders Hauke 8/10 1969 days 91%
Lengxi 8/10 1969 days 91%
Arvid Hellquist 9/10 2341 days 73%
Steven Lotrian 9/10 2688 days 51%
Alex Artigues 10/10 2736 days 48%
Serge Garcin 10/10 2736 days 48%
Tourist101 2/10 3190 days 13%
kayburns 9/10 3250 days 16%
Alison Rosser 7/10 3427 days 4%
Helen & Laurence 8/10 3502 days 0%
Kris Gijbels 8/10 3748 days 22%
Mike 6/10 3786 days 18%
Stefan Morris 8/10 3789 days 22%
Jessie Currie 7/10 3789 days 20%
Barry 9/10 3791 days 23%
Melanie Armbruster 6/10 3794 days 18%
Stefanie Halbrock 5/10 3794 days 17%
Jim Thomsen 8/10 3795 days 22%
Kate Thomsen 8/10 3795 days 22%
Denecke Thorsten 7/10 4144 days 20%
M and H Lunn 8/10 4144 days 22%
Henrik Plichta 9/10 4144 days 23%
Michael 10/10 4145 days 23%
San Ahuia 5/10 4154 days 17%
Amer 10/10 4160 days 23%
Coby Aalbrecht 7/10 4162 days 20%
Andreas Sterki 8/10 4233 days 22%
X Otte 7/10 4233 days 20%
Hansjoerg Ehrmann 9/10 4236 days 23%
Sophie Keate 8/10 4352 days 22%
Catherine Smiles 10/10 4382 days 23%
Martina 6/10 4469 days 18%
IanM 8/10 4469 days 22%
MarielR 9/10 4487 days 23%
Joel 9/10 4489 days 23%
Brigette Guikens 10/10 4490 days 23%
Keith 7/10 4493 days 20%
JuliaG1 8/10 4502 days 22%
DavidMurray 8/10 4503 days 22%
RosC 6/10 4504 days 18%
AndrewF78 9/10 4505 days 23%
EmmaB1 9/10 4515 days 23%
ClaudiaK 10/10 4518 days 23%
ArnarF 9/10 4528 days 23%
SonjaS 10/10 4528 days 23%
Burkhalter 9/10 4540 days 23%
Rene 7/10 4541 days 20%
Paula 8/10 4594 days 22%
Teresa 10/10 4600 days 23%
Kay 10/10 4648 days 23%
Jimmy 9/10 4666 days 23%
Anna 10/10 4666 days 23%
sabine 10/10 4666 days 23%
Elisabeth 10/10 4675 days 23%
Terneal King 7/10 4707 days 20%
Helen 6/10 4717 days 18%
Nicnac 8/10 4834 days 22%
Mark 10/10 4839 days 23%
Joanne M 7/10 4845 days 20%
Anna 10/10 4846 days 23%
Leila 9/10 4849 days 23%
Adam Richards 8/10 4849 days 22%
Lena1 9/10 4869 days 23%
Stephanie 9/10 4881 days 23%
Hanna 6/10 4882 days 18%
Maree 8/10 4882 days 22%
Orlaith 9/10 4882 days 23%
Lisa 8/10 4882 days 22%
Stephanie Jones 6/10 4909 days 18%
Paula Smith 7/10 4912 days 20%
Bridgy 8/10 5158 days 22%
JanKovar 6/10 5186 days 18%

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

-2.10% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 120 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 -2.06%
198 -2.07%
199 -2.09%
200 -2.10%
201 -2.11%
202 -2.12%
203 -2.13%

Final Ranking Score

81%

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.