Ranking Score Explained

G'day, 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 National Aquarium of New Zealand.

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

Rankers Owner

The National Aquarium of New Zealand

Valid Reviews

38 Valid Reviews

The The National Aquarium of New Zealand experience has a total of 39 reviews. There are 38 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 38 valid reviews:

Rating Count Percentage
10/10 4
11%
9/10 8
21%
8/10 9
24%
7/10 5
13%
6/10 4
11%
5/10 4
11%
4/10 2
5%
3/10 2
5%
2/10 0
0%
1/10 0
0%

72.89% Average

The raw data average (mean) for all the The National Aquarium of New Zealand valid reviews is 72.89% and is based on 38 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

35 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 38 valid reviews, the experience has 35 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 35 face-to-face reviews:

Rating Count Percentage
10/10 4
11%
9/10 8
23%
8/10 7
20%
7/10 4
11%
6/10 4
11%
5/10 4
11%
4/10 2
6%
3/10 2
6%
2/10 0
0%
1/10 0
0%

72.57% Average

The raw data average (mean) for all the The National Aquarium of New Zealand face-to-face reviews is 72.57% and is based on 35 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

76.69%

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
Michael Bley 5/10 2863 days 77%
Claudia Hobbs 9/10 2884 days 100%
Michael 8/10 2910 days 97%
Suzannah Hill 9/10 2917 days 98%
Selma Franke 9/10 2952 days 95%
Benjamin Schyler 4/10 3164 days 52%
Thomas Michel 9/10 3169 days 80%
Hana Rachfalik 8/10 3188 days 78%
Tim Ronke 10/10 3198 days 79%
Maxim Motheus 5/10 3221 days 59%
Brennan Jungling 8/10 3235 days 75%
Anita Wallace 8/10 3235 days 75%
Flora Kiessling 5/10 3242 days 57%
Mattias 7/10 3899 days 28%
Pavel Macek 8/10 3899 days 30%
Friederike Kranzin 6/10 3935 days 24%
Sophia 6/10 3945 days 23%
Melissa Hermansson 7/10 3955 days 25%
Maxime 3/10 4305 days 0%
Lis Bon 8/10 4321 days 1%
Darina Kvasnicova 9/10 4660 days 32%
Johann Maier 10/10 4671 days 33%
Leander Siegert 7/10 4685 days 30%
Remco te Lintum 10/10 4765 days 33%
Bob & Lynda Miller 9/10 5018 days 32%
Wender Jakoleseu 9/10 5391 days 32%
Anna 5/10 5487 days 24%
Katharina 8/10 5727 days 32%
Christian Troendle 6/10 5729 days 28%
Tanya 4/10 5740 days 20%
Marlena 10/10 5746 days 33%
VictoriaH 7/10 5758 days 30%
Kellie Teichmann 7/10 6024 days 30%
Tobias Rahm 6/10 6128 days 28%
Linda 3/10 6204 days 16%
Manuel 8/10 6212 days 32%
Christin 9/10 6213 days 32%
Rietveld 8/10 6481 days 32%

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 The National Aquarium of New Zealand 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 National Aquarium of New Zealand 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 National Aquarium of New Zealand 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%

Balancing Adjustment

5.67% 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

78%

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.