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 NZ Snow Tours.

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

NZ Snow Tours

Valid Reviews

44 Valid Reviews

The NZ Snow Tours experience has a total of 44 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 44 valid reviews:

Rating Count Percentage
10/10 43
9/10 1
8/10 0
7/10 0
6/10 0
5/10 0
4/10 0
3/10 0
2/10 0
1/10 0

99.77% Average

The raw data average (mean) for all the NZ Snow Tours valid reviews is 99.77% and is based on 44 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 Relative Weight
Eddy Bussiere 10/10 569 days 100%
Bert Roy 10/10 569 days 100%
Sarah Baxter 10/10 569 days 100%
June Fang 10/10 600 days 89%
Kathy Torzsok 10/10 600 days 89%
Carolyn Hobson 10/10 935 days 15%
Nigel Garrard 10/10 966 days 12%
Kylie McShanag 10/10 1269 days 5%
Joanna 10/10 1300 days 5%
George Couch 10/10 1300 days 5%
Patrick Ong 10/10 1665 days 4%
John Paxinos 10/10 1665 days 4%
ALAN MOLTON 9/10 1665 days 4%
Mary-Alice 10/10 1665 days 4%
Alex Chung 10/10 1665 days 4%
wen 10/10 2030 days 3%
dankajonjic 10/10 2030 days 3%
Mags 10/10 2030 days 3%
belsta74 10/10 2061 days 3%
tylercraddock 10/10 2061 days 3%
kitkatchunky_123 10/10 2061 days 3%
murfster 10/10 2396 days 2%
ralphfromgoondi 10/10 2396 days 2%
alexgoss 10/10 2730 days 1%
Harlow 10/10 2730 days 1%
Big Al 10/10 2730 days 1%
presel 10/10 2761 days 1%
Soph707 10/10 2761 days 1%
LyndonM 10/10 2761 days 1%
GlenH 10/10 2761 days 1%
tkirk82 10/10 2761 days 1%
Dazbar23 10/10 2761 days 1%
benspictures 10/10 2792 days 1%
lapcam 10/10 2792 days 1%
jamophoto 10/10 2792 days 1%
Lisa78 10/10 2792 days 1%
Mel 10/10 2792 days 1%
yealmchev 10/10 2792 days 1%
ailzy 10/10 3095 days 0%
hedge23 10/10 3126 days 0%
DAC72 10/10 3126 days 0%
soccernaut 10/10 3126 days 0%
mazarg 10/10 3126 days 0%
caz916 10/10 3126 days 0%


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 NZ Snow Tours experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-7.28% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the NZ Snow Tours 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 364 days.

The NZ Snow Tours experience has been adjusted for 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

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.