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

82.96%

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 1524 days true 4.16 100%
Mijke Boesten 8/10 1579 days true 3.85 93%
Anders Hauke 8/10 1580 days true 3.85 92%
Lengxi 8/10 1580 days true 3.85 92%
Arvid Hellquist 9/10 1952 days true 3.32 80%
Steven Lotrian 9/10 2299 days true 2.64 64%
Alex Artigues 10/10 2347 days true 2.55 61%
Serge Garcin 10/10 2347 days true 2.55 61%
Tourist101 2/10 2801 days 1.25 30%
kayburns 9/10 2862 days 1.54 37%
Alison Rosser 7/10 3038 days true 1.09 26%
Helen & Laurence 8/10 3113 days true 1.0 24%
Kris Gijbels 8/10 3359 days true 0.54 13%
Mike 6/10 3397 days true 0.41 10%
Stefan Morris 8/10 3400 days true 0.46 11%
Jessie Currie 7/10 3400 days true 0.45 11%
Barry 9/10 3402 days true 0.49 12%
Melanie Armbruster 6/10 3405 days true 0.4 10%
Stefanie Halbrock 5/10 3405 days true 0.39 9%
Jim Thomsen 8/10 3406 days true 0.45 11%
Kate Thomsen 8/10 3406 days true 0.45 11%
Denecke Thorsten 7/10 3755 days true 0.0 0%
M and H Lunn 8/10 3755 days true 0.0 0%
Henrik Plichta 9/10 3755 days true 0.0 0%
Michael 10/10 3756 days true 0.0 0%
San Ahuia 5/10 3765 days true 0.0 0%
Amer 10/10 3771 days true 0.0 0%
Coby Aalbrecht 7/10 3773 days true 0.0 0%
Andreas Sterki 8/10 3844 days true 0.0 0%
X Otte 7/10 3844 days true 0.0 0%
Hansjoerg Ehrmann 9/10 3847 days true 0.0 0%
Sophie Keate 8/10 3964 days true 0.0 0%
Catherine Smiles 10/10 3994 days true 0.0 0%
Martina 6/10 4080 days 0.0 0%
IanM 8/10 4080 days true 0.0 0%
MarielR 9/10 4098 days true 0.0 0%
Joel 9/10 4100 days true 0.0 0%
Brigette Guikens 10/10 4101 days true 0.0 0%
Keith 7/10 4104 days true 0.0 0%
JuliaG1 8/10 4113 days true 0.0 0%
DavidMurray 8/10 4114 days true 0.0 0%
RosC 6/10 4115 days true 0.0 0%
AndrewF78 9/10 4116 days true 0.0 0%
EmmaB1 9/10 4126 days true 0.0 0%
ClaudiaK 10/10 4129 days true 0.0 0%
ArnarF 9/10 4139 days true 0.0 0%
SonjaS 10/10 4139 days true 0.0 0%
Burkhalter 9/10 4151 days true 0.0 0%
Rene 7/10 4152 days true 0.0 0%
Paula 8/10 4205 days true 0.0 0%
Teresa 10/10 4211 days true 0.0 0%
Kay 10/10 4259 days true 0.0 0%
Jimmy 9/10 4277 days true 0.0 0%
Anna 10/10 4277 days true 0.0 0%
sabine 10/10 4277 days true 0.0 0%
Elisabeth 10/10 4286 days true 0.0 0%
Terneal King 7/10 4318 days 0.0 0%
Helen 6/10 4328 days true 0.0 0%
Nicnac 8/10 4445 days 0.0 0%
Mark 10/10 4450 days true 0.0 0%
Joanne M 7/10 4456 days true 0.0 0%
Anna 10/10 4457 days true 0.0 0%
Leila 9/10 4460 days true 0.0 0%
Adam Richards 8/10 4460 days true 0.0 0%
Lena1 9/10 4480 days 0.0 0%
Stephanie 9/10 4492 days true 0.0 0%
Hanna 6/10 4493 days true 0.0 0%
Maree 8/10 4493 days true 0.0 0%
Orlaith 9/10 4493 days true 0.0 0%
Lisa 8/10 4493 days true 0.0 0%
Stephanie Jones 6/10 4520 days true 0.0 0%
Paula Smith 7/10 4523 days true 0.0 0%
Bridgy 8/10 4770 days true 0.0 0%
JanKovar 6/10 4798 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

-2.42% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 107 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 -2.38%
198 -2.39%
199 -2.40%
200 -2.42%
201 -2.43%
202 -2.44%
203 -2.45%

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.