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 Glacier Hot Pools.

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

Glacier Hot Pools

Valid Reviews

40 Valid Reviews

The Glacier Hot Pools experience has a total of 41 reviews. There are 40 valid reviews that are included when calculating the ranking score and 1 invalid review 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 40 valid reviews:

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

78.00% Average

The raw data average (mean) for all the Glacier Hot Pools valid reviews is 78.00% and is based on 40 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

30 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 40 valid reviews, the experience has 30 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 30 face-to-face reviews:

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

77.33% Average

The raw data average (mean) for all the Glacier Hot Pools face-to-face reviews is 77.33% and is based on 30 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
Arlene 10/10 412 days 100%
Paula G 5/10 1143 days 5%
Jessica and Jonny Pollard 9/10 1784 days 5%
Monica Francia 4/10 1824 days 4%
Claudia Hobbs 7/10 1835 days 4%
Flrent 5/10 1835 days 4%
Hailey S 10/10 1897 days 5%
Helena Bond 8/10 2153 days 4%
James Esele 9/10 2235 days 4%
Michele 9/10 2848 days 2%
Julian Zeissler 6/10 2871 days 2%
Antoine 8/10 2888 days 2%
Fred and Carin 8/10 3323 days 1%
Danielle Roberts 8/10 3425 days 1%
Vlutters 8/10 3614 days 0%
Ian Bailey 6/10 3618 days 0%
Seth & Carla 10/10 3623 days 0%
Koster 2/10 3624 days 0%
Andreas & Leonie Fehr 9/10 3630 days 0%
Lynn Robinson 10/10 3630 days 0%
scottee 8/10 3914 days 1%
Mariette Salden 8/10 3948 days 1%
Victoria Boolsen 7/10 3967 days 1%
Roland Berger 8/10 3968 days 1%
Dwong1959 1/10 3975 days 1%
Matthias 10/10 3992 days 1%
Nataly Loewidt 7/10 3995 days 1%
ELLY186 10/10 4095 days 1%
KAA 10/10 4126 days 1%
Mary Van 10/10 4126 days 1%
Risch & Seybold 10/10 4322 days 1%
Jana Steve 8/10 4334 days 1%
Sally Hall 5/10 4388 days 1%
Kyle Riseley 10/10 4441 days 1%
harryb 8/10 4539 days 1%
Joanna Harrnon 9/10 4673 days 1%
Conrad Duden 9/10 4674 days 1%
marianneb 8/10 4674 days 1%
Denys 6/10 4678 days 1%
AdelineC 9/10 4709 days 1%


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 Glacier Hot Pools experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.09% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 46 days. However the Glacier Hot Pools 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 Glacier Hot Pools experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.03%
198 -4.05%
199 -4.07%
200 -4.09%
201 -4.11%
202 -4.13%
203 -4.15%

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.