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 Auckland Zoo.

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

Auckland Zoo

Valid Reviews

30 Valid Reviews

The Auckland Zoo experience has a total of 30 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 30 valid reviews:

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

84.33% Average

The raw data average (mean) for all the Auckland Zoo valid reviews is 84.33% and is based on 30 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

21 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 30 valid reviews, the experience has 21 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 21 face-to-face reviews:

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

82.86% Average

The raw data average (mean) for all the Auckland Zoo face-to-face reviews is 82.86% and is based on 21 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
Sophie 7/10 1636 days 91%
romain perroches 10/10 1650 days 100%
Soria Chher 8/10 1650 days 95%
Susanne Breudel 7/10 1878 days 79%
Felix Sternke 8/10 1932 days 80%
Lars Schuett 10/10 1944 days 84%
Martin Sajdok 10/10 2604 days 48%
Katarina 10/10 2604 days 48%
Jolan Ancey 7/10 2656 days 40%
Julia Ramseier 10/10 3100 days 21%
Kurt Furuskar 9/10 3403 days 4%
_mel_ 8/10 3423 days 3%
nathan_carr 10/10 3484 days 0%
Jason & Beth Berlin 10/10 3715 days 19%
Adam Hayley 3/10 3741 days 12%
BigSis 9/10 3941 days 19%
Mr and Mrs Scott 10/10 4094 days 19%
middendorp 6/10 4168 days 14%
emmah 8/10 4311 days 17%
Russ C 9/10 4428 days 19%
JasonL 7/10 4440 days 16%
JuliaG1 10/10 4461 days 19%
Heather 6/10 4464 days 14%
Tamara 7/10 4568 days 16%
sasssy 10/10 4702 days 19%
Edmund Hillstone 10/10 4745 days 19%
Steve Peake 6/10 4859 days 14%
Helen 10/10 5146 days 19%
Katherine 10/10 5184 days 19%
Justin 8/10 5198 days 17%


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 Auckland Zoo experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.78% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 92 days. However the Auckland Zoo 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 Auckland Zoo experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -2.74%
198 -2.75%
199 -2.77%
200 -2.78%
201 -2.79%
202 -2.81%
203 -2.82%

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.