Ranking Score Explained

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 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.

Cymen Crick's avatar

Cymen Crick

Rankers Owner

Auckland Zoo

Valid Reviews

30 Valid Reviews

The Auckland Zoo experience has a total of 32 reviews. There are 30 valid reviews that are included when calculating the ranking score and 2 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
43%
9/10 3
10%
8/10 5
17%
7/10 5
17%
6/10 3
10%
5/10 0
0%
4/10 0
0%
3/10 1
3%
2/10 0
0%
1/10 0
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
43%
9/10 1
5%
8/10 4
19%
7/10 4
19%
6/10 2
10%
5/10 0
0%
4/10 0
0%
3/10 1
5%
2/10 0
0%
1/10 0
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

84.82%

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 2901 days 94%
romain perroches 10/10 2915 days 100%
Soria Chher 8/10 2915 days 98%
Susanne Breudel 7/10 3143 days 78%
Felix Sternke 8/10 3197 days 79%
Lars Schuett 10/10 3209 days 80%
Martin Sajdok 10/10 3869 days 34%
Katarina 10/10 3869 days 34%
Jolan Ancey 7/10 3921 days 28%
Julia Ramseier 10/10 4365 days 0%
Kurt Furuskar 9/10 4668 days 34%
_mel_ 8/10 4688 days 34%
nathan_carr 10/10 4749 days 34%
Jason & Beth Berlin 10/10 4980 days 34%
Adam Hayley 3/10 5006 days 18%
BigSis 9/10 5205 days 34%
Mr and Mrs Scott 10/10 5359 days 34%
middendorp 6/10 5433 days 29%
emmah 8/10 5575 days 34%
Russ C 9/10 5693 days 34%
JasonL 7/10 5705 days 32%
JuliaG1 10/10 5726 days 34%
Heather 6/10 5729 days 29%
Tamara 7/10 5833 days 32%
sasssy 10/10 5966 days 34%
Edmund Hillstone 10/10 6010 days 34%
Steve Peake 6/10 6123 days 29%
Helen 10/10 6410 days 34%
Katherine 10/10 6449 days 34%
Justin 8/10 6463 days 34%

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

Recent Reviews Adjustment

-3.87% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 50 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 -3.81%
198 -3.83%
199 -3.85%
200 -3.87%
201 -3.89%
202 -3.91%
203 -3.93%

Balancing Adjustment

2.74% 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

84%

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.