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 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.

Nick Morrison's avatar

Nick Morrison

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 10/10 694 days 100%
Alias Gertrude 10/10 1029 days 19%
Jan 10/10 1029 days 19%
helen mclean 10/10 1060 days 17%
John Hayman 9/10 1180 days 16%
wendy mesley 9/10 1394 days 14%
Michelle 10/10 1394 days 14%
Derwin Arnstead 10/10 1483 days 14%
Anne Duncan 10/10 1848 days 12%
Nick Smith 9/10 2154 days 10%
Fiona 9/10 2154 days 10%
Dianne Kidd 10/10 2183 days 9%
David Darmanin 10/10 2184 days 9%
Sam 10/10 2214 days 9%
Julie B 10/10 2245 days 9%
Janelle Varlow 10/10 2275 days 9%
Helen Bryan 10/10 2489 days 7%
Geoff Bartlett 10/10 2520 days 7%
Diana Houtman 10/10 2520 days 7%
Mary Karl 10/10 2520 days 7%
fgiacoma 9/10 2548 days 7%
ross murray 10/10 2580 days 7%
Jane Geldenhuys 10/10 2610 days 7%
Ian Anderson 10/10 2610 days 7%
Ros Noone 9/10 2640 days 6%
Peter Hales 9/10 2855 days 5%
David Vinsen 10/10 2886 days 5%
Caroline Barber 9/10 2914 days 5%
Denise McMahon 9/10 2914 days 5%
cmh 10/10 3006 days 4%
John Marchment 10/10 3037 days 4%
Ian and Chris Homann 10/10 3251 days 3%
Nancy Stone 10/10 3279 days 2%
Graham Bamford 10/10 3310 days 2%
pauart 10/10 3371 days 2%
jennic 9/10 3402 days 2%
smithereen 10/10 3585 days 0%
Maryel 10/10 3585 days 0%
Woods 10/10 3616 days 0%
JennyT 10/10 3616 days 0%
maureenmf 10/10 3616 days 0%
frankie 10/10 3616 days 0%
FrancesJ 9/10 3616 days 0%
AlanWillow 10/10 3616 days 0%
cribble 9/10 3616 days 0%
shoanthomson 10/10 3616 days 0%
Montpellier 9/10 3645 days 0%
LIZ_MONTGOMERY 10/10 3676 days 3%
upmack 10/10 3676 days 3%
Michael73 10/10 3707 days 3%
LizH 10/10 3737 days 3%
lyndab 9/10 3737 days 3%
frendoj 9/10 3737 days 3%


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

-4.12% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 48 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 -4.06%
198 -4.08%
199 -4.10%
200 -4.12%
201 -4.14%
202 -4.16%
203 -4.18%

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.