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 National Army Museum.

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

National Army Museum

Valid Reviews

20 Valid Reviews

The National Army Museum experience has a total of 20 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 20 valid reviews:

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

85.00% Average

The raw data average (mean) for all the National Army Museum valid reviews is 85.00% and is based on 20 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

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 Face-to-Face Weight Relative Weight
Chulses 9/10 54 days 99.54 100%
Alison 9/10 84 days 98.88 99%
Nadia 8/10 176 days 90.34 90%
Marion & Leonie 10/10 204 days 93.41 94%
Michael S 9/10 204 days 93.41 94%
Tim Bartlett 10/10 235 days 91.25 91%
Dan 10/10 235 days 91.25 91%
Jude 8/10 296 days 81.81 82%
Steffi 6/10 296 days 71.48 71%
Jess 10/10 449 days 68.05 67%
Julien Turpin 9/10 745 days 24.41 22%
Judy Aspinall 8/10 860 days 13.06 10%
Anh Huynh 7/10 962 days 7.1 4%
Marina 7/10 1297 days 4.27 1%
Chris Whittington 9/10 1688 days 4.1 1%
Mathieu Flechelle 8/10 1695 days 3.88 1%
Lois Moreland 9/10 1726 days 4.04 1%
John Treasure 7/10 2030 days 3.25 0%
GN100 7/10 2214 days 3.0 0%
L P 10/10 2245 days 3.25 0%


No Adjustment

Several adjustments to the weighted average may be added to improve relevancy and credibility. National Army Museum does not meet the criteria for any of these adjustments to apply.

Final Ranking Score


The final ranking score once 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.