Ranking Score Explained

G'day, 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 Dart River Jet Safaris.

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.

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Cymen Crick

Rankers Owner

Dart River Jet Safaris

Valid Reviews

28 Valid Reviews

The Dart River Jet Safaris experience has a total of 29 reviews. There are 28 valid reviews that are included when calculating the ranking score and 1 invalid review 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 28 valid reviews:

Rating Count Percentage
10/10 13
46%
9/10 7
25%
8/10 6
21%
7/10 1
4%
6/10 0
0%
5/10 1
4%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

90.36% Average

The raw data average (mean) for all the Dart River Jet Safaris valid reviews is 90.36% and is based on 28 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

16 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 28 valid reviews, the experience has 16 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 16 face-to-face reviews:

Rating Count Percentage
10/10 6
38%
9/10 4
25%
8/10 5
31%
7/10 1
6%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

89.38% Average

The raw data average (mean) for all the Dart River Jet Safaris face-to-face reviews is 89.38% and is based on 16 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

92.82%

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
Jana Erdel 10/10 2593 days 100%
Walter van der Eng 10/10 2827 days 86%
Ron Stenhouse 8/10 4269 days 2%
Elizabeth Stenhouse 9/10 4269 days 3%
Enna Keet 8/10 4312 days 0%
nathan_carr 10/10 4817 days 26%
neilqecosse 10/10 4847 days 26%
Frank & Margot Best 8/10 4983 days 25%
Judith 7/10 5017 days 24%
Jim & Rebecca 9/10 5023 days 26%
Chris & Rob 8/10 5328 days 25%
Bob Lenihan 10/10 5382 days 26%
Jackie 10/10 5415 days 26%
Sally Orr 10/10 5424 days 26%
Phillip Rurgger 9/10 5494 days 26%
neilchelt 5/10 5516 days 19%
eowyn2k 10/10 5516 days 26%
Greg783 8/10 5700 days 25%
David 9/10 5730 days 26%
Nanou Van Beveren 9/10 5766 days 26%
Stephanie Schikora 10/10 5873 days 26%
Johannes Kerner 9/10 5879 days 26%
Christian 10/10 6117 days 26%
Paul Weston 8/10 6123 days 25%
Lyn Saxon 10/10 6215 days 26%
Amanda McCaig 10/10 6217 days 26%
Fenke 9/10 6472 days 26%
sasssy 10/10 7616 days 26%

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 Dart River Jet Safaris experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.07% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the Dart River Jet Safaris 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 Dart River Jet Safaris experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

Balancing Adjustment

1.18% Adjustment

Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.

You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.

We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.

Final Ranking Score

90%

The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.