Ranking Score Explained

Kia ora 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 PureTrails 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.

Cymen Crick's avatar

Cymen Crick

Rankers Owner

PureTrails New Zealand

Valid Reviews

53 Valid Reviews

The PureTrails New Zealand experience has a total of 56 reviews. There are 53 valid reviews that are included when calculating the ranking score and 3 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 53 valid reviews:

Rating Count Percentage
10/10 38
9/10 15
8/10 0
7/10 0
6/10 0
5/10 0
4/10 0
3/10 0
2/10 0
1/10 0

97.17% Average

The raw data average (mean) for all the PureTrails New Zealand valid reviews is 97.17% and is based on 53 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
Gordon 10/10 894 days 100%
Alias Gertrude 10/10 1229 days 41%
Jan 10/10 1229 days 41%
helen mclean 10/10 1260 days 41%
John Hayman 9/10 1380 days 38%
wendy mesley 9/10 1594 days 35%
Michelle 10/10 1594 days 35%
Derwin Arnstead 10/10 1684 days 33%
Anne Duncan 10/10 2049 days 27%
Nick Smith 9/10 2355 days 22%
Fiona 9/10 2355 days 22%
Dianne Kidd 10/10 2384 days 21%
David Darmanin 10/10 2384 days 21%
Sam 10/10 2415 days 21%
Julie B 10/10 2446 days 20%
Janelle Varlow 10/10 2476 days 19%
Helen Bryan 10/10 2690 days 16%
Geoff Bartlett 10/10 2721 days 15%
Diana Houtman 10/10 2721 days 15%
Mary Karl 10/10 2721 days 15%
fgiacoma 9/10 2749 days 15%
ross murray 10/10 2780 days 14%
Jane Geldenhuys 10/10 2811 days 14%
Ian Anderson 10/10 2811 days 14%
Ros Noone 9/10 2841 days 13%
Peter Hales 9/10 3055 days 9%
David Vinsen 10/10 3086 days 9%
Caroline Barber 9/10 3114 days 8%
Denise McMahon 9/10 3114 days 8%
cmh 10/10 3206 days 7%
John Marchment 10/10 3237 days 6%
Ian and Chris Homann 10/10 3451 days 3%
Nancy Stone 10/10 3479 days 2%
Graham Bamford 10/10 3510 days 2%
pauart 10/10 3571 days 1%
jennic 9/10 3602 days 0%
smithereen 10/10 3785 days 8%
Maryel 10/10 3785 days 8%
Woods 10/10 3816 days 8%
JennyT 10/10 3816 days 8%
maureenmf 10/10 3816 days 8%
frankie 10/10 3816 days 8%
FrancesJ 9/10 3816 days 8%
AlanWillow 10/10 3816 days 8%
cribble 9/10 3816 days 8%
shoanthomson 10/10 3816 days 8%
Montpellier 9/10 3845 days 8%
LIZ_MONTGOMERY 10/10 3876 days 8%
upmack 10/10 3876 days 8%
Michael73 10/10 3907 days 8%
LizH 10/10 3937 days 8%
lyndab 9/10 3937 days 8%
frendoj 9/10 3937 days 8%


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 PureTrails New Zealand experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.25% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 117 days. However the PureTrails 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 PureTrails New Zealand experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -2.21%
198 -2.23%
199 -2.24%
200 -2.25%
201 -2.26%
202 -2.27%
203 -2.28%

Final Ranking Score


The final ranking score once any adjustments, ratings, 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.