Kia ora, 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 Craters of the Moon.

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.

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Cymen Crick's avatar

Cymen Crick

Rankers Owner

Craters of the Moon

Valid Reviews

66 Valid Reviews

The Craters of the Moon experience has a total of 66 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 66 valid reviews:

Rating Count Percentage
10/10 3
5%
9/10 10
15%
8/10 14
21%
7/10 16
24%
6/10 8
12%
5/10 4
6%
4/10 8
12%
3/10 2
3%
2/10 0
0%
1/10 1
2%

68.33% Average

The raw data average (mean) for all the Craters of the Moon valid reviews is 68.33% and is based on 66 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

56 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 66 valid reviews, the experience has 56 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 56 face-to-face reviews:

Rating Count Percentage
10/10 2
4%
9/10 9
16%
8/10 12
21%
7/10 14
25%
6/10 7
13%
5/10 3
5%
4/10 7
13%
3/10 2
4%
2/10 0
0%
1/10 0
0%

68.93% Average

The raw data average (mean) for all the Craters of the Moon face-to-face reviews is 68.93% and is based on 56 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

69.40%

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
Ngamarama Mataio 4/10 1421 days 100%
Michael Bley 7/10 2944 days 28%
Connor Hormell 10/10 3006 days 29%
Karlee Hormell 9/10 3007 days 28%
Lucy Millett 5/10 3009 days 22%
Mona Uttendorf 6/10 3010 days 25%
Lisa 8/10 3016 days 28%
Barbara 10/10 3018 days 28%
Menguy Thibault 6/10 3249 days 20%
Anna Lerchl 8/10 3274 days 23%
Hannes 9/10 3276 days 23%
Marlene Buchwald 4/10 3293 days 15%
Andreas Schiefer 9/10 3309 days 22%
Catharina Cuntz 9/10 3313 days 22%
Franziska and Sabine 7/10 3320 days 20%
Thomas and Katia 6/10 3353 days 18%
Michal Kamradek 7/10 3713 days 13%
Jutta Bernhart 6/10 3726 days 12%
Richard 7/10 3887 days 9%
Ondrej Stepanek 3/10 3978 days 4%
Boneschova Jarka 7/10 3978 days 8%
Jakub Stastny 4/10 3979 days 5%
Granjon 8/10 4010 days 7%
Miriam Grund 9/10 4013 days 7%
Philip Donachie 8/10 4025 days 7%
Max Tetzlaff 8/10 4035 days 7%
Elise Boinnot 9/10 4036 days 7%
Thomas Dequidt 7/10 4036 days 6%
Claudia 7/10 4046 days 6%
Bertrand Gilles 4/10 4356 days 0%
Clodec 8/10 4369 days 0%
ToGy 1/10 4739 days 4%
Slangen 7/10 4761 days 10%
katel86 8/10 4921 days 10%
Johnno25 7/10 4983 days 10%
rgoodwi3 10/10 5013 days 10%
Alice Bastiman 5/10 5082 days 8%
Natalie Maguire 9/10 5088 days 10%
Andreas Rath 4/10 5090 days 7%
Nikolas Woelzel 3/10 5107 days 6%
Adam Hayley 4/10 5117 days 7%
Ines 8/10 5120 days 10%
Derek Archibald 7/10 5126 days 10%
Andrew Hammond 8/10 5256 days 10%
Matt Roper 8/10 5461 days 10%
M and H Lunn 7/10 5479 days 10%
Dersiree Moerbeek 6/10 5496 days 9%
Bram-Jan M 8/10 5497 days 10%
Sebastien Briant 4/10 5497 days 7%
Coby Aalbrecht 8/10 5497 days 10%
Wolfgang G 9/10 5504 days 10%
J P Paulvast 8/10 5512 days 10%
Jorrit Bust 7/10 5512 days 10%
_mel_ 5/10 5529 days 8%
robineth 4/10 5553 days 7%
Mark Piche 7/10 5609 days 10%
KYinNZ 6/10 5713 days 9%
KatieR 8/10 5802 days 10%
Andrew 9/10 5804 days 10%
gerhardm 6/10 5804 days 9%
PeteH1 6/10 5820 days 9%
AliR 5/10 5820 days 8%
Nick 9/10 5820 days 10%
Andreas 7/10 5876 days 10%
Katherine 7/10 5909 days 10%
Claire 7/10 5917 days 10%

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

Recent Reviews Adjustment

-4.14% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 53 days. However the Craters of the Moon 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 Craters of the Moon experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.08%
198 -4.10%
199 -4.12%
200 -4.14%
201 -4.16%
202 -4.19%
203 -4.21%

Balancing Adjustment

10.03% Adjustment

Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.

You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.

We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.

Final Ranking Score

75%

The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.