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 The Weta Cave.

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

The Weta Cave

Valid Reviews

52 Valid Reviews

The The Weta Cave experience has a total of 52 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 52 valid reviews:

Rating Count Percentage
10/10 15
9/10 14
8/10 11
7/10 7
6/10 2
5/10 2
4/10 0
3/10 0
2/10 1
1/10 0

84.04% Average

The raw data average (mean) for all the The Weta Cave valid reviews is 84.04% and is based on 52 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

50 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 52 valid reviews, the experience has 50 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 50 face-to-face reviews:

Rating Count Percentage
10/10 13
9/10 14
8/10 11
7/10 7
6/10 2
5/10 2
4/10 0
3/10 0
2/10 1
1/10 0

83.40% Average

The raw data average (mean) for all the The Weta Cave face-to-face reviews is 83.40% and is based on 50 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average


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
Harriet and Paul 9/10 1744 days 100%
Margot 7/10 1814 days 87%
Bjorn Nielsen 9/10 1816 days 96%
Rose Guillaume 10/10 1838 days 95%
Pierre Landenne 7/10 1838 days 86%
Simeon Manz 10/10 1850 days 94%
Selma Franke 8/10 1857 days 89%
MARK CURPHEY 10/10 1867 days 93%
Sam Taylor 8/10 1868 days 88%
Dave Ellis 8/10 1868 days 88%
tinagermany111 5/10 1887 days 74%
Thomas Le Buzulier 10/10 2081 days 82%
Daniel Idiart 10/10 2086 days 81%
Liam King 9/10 2087 days 81%
Matthew Baker 9/10 2087 days 81%
Karin Karlsson 8/10 2090 days 77%
Hana Rachfalik 10/10 2093 days 81%
Anthony 8/10 2095 days 77%
Ann-Kathrin 8/10 2119 days 75%
Emma Burtscher 2/10 2127 days 58%
Jan 10/10 2130 days 79%
Briony 8/10 2131 days 75%
David Schelensky 10/10 2131 days 79%
Sascha Daub 8/10 2132 days 75%
Richard Starkeq 9/10 2132 days 79%
Robin Ings 6/10 2136 days 65%
Flo and Frieda 7/10 2155 days 70%
Pierre Planchez 9/10 2500 days 59%
Lukas Dost 10/10 2515 days 58%
Greg Little 10/10 2516 days 58%
Iana Pauga 10/10 2526 days 57%
Astrid Egesten 9/10 2565 days 55%
James Russell 8/10 2809 days 40%
Hannah Watt 7/10 2809 days 38%
Jan Legein 9/10 2810 days 42%
Herman Schulz 8/10 2835 days 38%
Rhys Williams 9/10 2857 days 39%
Dan Lawson 10/10 2873 days 38%
Paul Taylor 5/10 3191 days 16%
Cloarec Guillaume 10/10 3193 days 21%
Clodec 9/10 3193 days 21%
Michal 9/10 3202 days 21%
Roshnie 7/10 3298 days 14%
Frederick Neilsen 9/10 3300 days 15%
Frank Claassen 8/10 3559 days 1%
Kimberley Mills 9/10 3579 days 0%
Helen & Laurence 7/10 3661 days 21%
Dave van Bergen 9/10 3893 days 24%
Anika Jedelsky 10/10 3930 days 24%
Kathryn Knipe 6/10 3947 days 19%
Stefan Morris 7/10 3948 days 21%
lindam 10/10 4263 days 24%


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 The Weta Cave experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.07% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 43 days. However the The Weta Cave 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 The Weta Cave experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

Final Ranking Score


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.