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

83.32%

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
Cassandra Geyer 9/10 1593 days true 4.03 100%
Mijke Boesten 8/10 1648 days true 3.72 92%
Anders Hauke 8/10 1649 days true 3.72 92%
Lengxi 8/10 1649 days true 3.72 92%
Arvid Hellquist 9/10 2021 days true 3.19 79%
Steven Lotrian 9/10 2368 days true 2.51 62%
Alex Artigues 10/10 2416 days true 2.41 60%
Serge Garcin 10/10 2416 days true 2.41 60%
Tourist101 2/10 2870 days 1.14 28%
kayburns 9/10 2931 days 1.41 35%
Alison Rosser 7/10 3107 days true 0.97 24%
Helen & Laurence 8/10 3182 days true 0.87 22%
Kris Gijbels 8/10 3428 days true 0.41 10%
Mike 6/10 3466 days true 0.3 7%
Stefan Morris 8/10 3469 days true 0.34 8%
Jessie Currie 7/10 3469 days true 0.32 8%
Barry 9/10 3471 days true 0.35 9%
Melanie Armbruster 6/10 3474 days true 0.29 7%
Stefanie Halbrock 5/10 3474 days true 0.28 7%
Jim Thomsen 8/10 3475 days true 0.33 8%
Kate Thomsen 8/10 3475 days true 0.33 8%
Denecke Thorsten 7/10 3824 days true 0.0 0%
M and H Lunn 8/10 3824 days true 0.0 0%
Henrik Plichta 9/10 3824 days true 0.0 0%
Michael 10/10 3825 days true 0.0 0%
San Ahuia 5/10 3834 days true 0.0 0%
Amer 10/10 3840 days true 0.0 0%
Coby Aalbrecht 7/10 3842 days true 0.0 0%
Andreas Sterki 8/10 3913 days true 0.0 0%
X Otte 7/10 3913 days true 0.0 0%
Hansjoerg Ehrmann 9/10 3916 days true 0.0 0%
Sophie Keate 8/10 4033 days true 0.0 0%
Catherine Smiles 10/10 4063 days true 0.0 0%
Martina 6/10 4149 days 0.0 0%
IanM 8/10 4149 days true 0.0 0%
MarielR 9/10 4167 days true 0.0 0%
Joel 9/10 4169 days true 0.0 0%
Brigette Guikens 10/10 4170 days true 0.0 0%
Keith 7/10 4173 days true 0.0 0%
JuliaG1 8/10 4182 days true 0.0 0%
DavidMurray 8/10 4183 days true 0.0 0%
RosC 6/10 4184 days true 0.0 0%
AndrewF78 9/10 4185 days true 0.0 0%
EmmaB1 9/10 4195 days true 0.0 0%
ClaudiaK 10/10 4198 days true 0.0 0%
ArnarF 9/10 4208 days true 0.0 0%
SonjaS 10/10 4208 days true 0.0 0%
Burkhalter 9/10 4220 days true 0.0 0%
Rene 7/10 4221 days true 0.0 0%
Paula 8/10 4274 days true 0.0 0%
Teresa 10/10 4280 days true 0.0 0%
Kay 10/10 4328 days true 0.0 0%
Jimmy 9/10 4346 days true 0.0 0%
Anna 10/10 4346 days true 0.0 0%
sabine 10/10 4346 days true 0.0 0%
Elisabeth 10/10 4355 days true 0.0 0%
Terneal King 7/10 4387 days 0.0 0%
Helen 6/10 4397 days true 0.0 0%
Nicnac 8/10 4514 days 0.0 0%
Mark 10/10 4519 days true 0.0 0%
Joanne M 7/10 4525 days true 0.0 0%
Anna 10/10 4526 days true 0.0 0%
Leila 9/10 4529 days true 0.0 0%
Adam Richards 8/10 4529 days true 0.0 0%
Lena1 9/10 4549 days 0.0 0%
Stephanie 9/10 4561 days true 0.0 0%
Hanna 6/10 4562 days true 0.0 0%
Maree 8/10 4562 days true 0.0 0%
Orlaith 9/10 4562 days true 0.0 0%
Lisa 8/10 4562 days true 0.0 0%
Stephanie Jones 6/10 4589 days true 0.0 0%
Paula Smith 7/10 4592 days true 0.0 0%
Bridgy 8/10 4839 days true 0.0 0%
JanKovar 6/10 4867 days true 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 Waitomo Caveworld experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.23% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 117 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 -2.20%
198 -2.21%
199 -2.22%
200 -2.23%
201 -2.24%
202 -2.26%
203 -2.27%

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.