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 Ziptrek Ecotours.

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

Ziptrek Ecotours

Valid Reviews

24 Valid Reviews

The Ziptrek Ecotours experience has a total of 24 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 24 valid reviews:

Rating Count Percentage
10/10 8
33%
9/10 2
8%
8/10 8
33%
7/10 3
13%
6/10 1
4%
5/10 2
8%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

82.92% Average

The raw data average (mean) for all the Ziptrek Ecotours valid reviews is 82.92% and is based on 24 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

14 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 24 valid reviews, the experience has 14 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 14 face-to-face reviews:

Rating Count Percentage
10/10 2
14%
9/10 2
14%
8/10 6
43%
7/10 2
14%
6/10 1
7%
5/10 1
7%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

79.29% Average

The raw data average (mean) for all the Ziptrek Ecotours face-to-face reviews is 79.29% and is based on 14 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

84.85%

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
Per Bang 8/10 628 days true 47.47 100%
Fran and Ben 10/10 637 days true 45.89 97%
Ellie 7/10 965 days true 9.21 16%
Kai Krchmar 8/10 1073 days true 6.09 9%
Sam Smith 5/10 1352 days 4.65 6%
Yiying Zhang 8/10 1565 days 4.36 5%
Emma Wallace 10/10 1752 days true 4.92 6%
Michael Sheridan 9/10 1758 days true 4.91 6%
Ben Sheridan 5/10 1758 days true 4.91 6%
Annika Schmidt 7/10 2057 days true 4.42 5%
Patrick Stoeit 8/10 2057 days true 4.42 5%
Lea Scheuvens 8/10 2073 days true 4.39 5%
Luise Fuchs 8/10 2073 days true 4.39 5%
Sharyn Crosby 10/10 2142 days 3.57 3%
Christian 6/10 2155 days true 4.26 5%
Rob Klauer 8/10 2436 days true 3.8 4%
nztintin 10/10 2448 days 3.15 2%
Wright 9/10 2452 days true 3.77 4%
ksummer 10/10 3026 days 2.35 1%
garfield 8/10 3118 days 2.23 0%
Marty Barlow 10/10 3179 days 2.15 0%
Jackie Smith 7/10 3238 days 2.06 0%
Matthew Davis 10/10 3269 days 2.02 0%
David Reid 10/10 3269 days 2.02 0%

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 Ziptrek Ecotours 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 Ziptrek Ecotours 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 Ziptrek Ecotours 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

78%

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.