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 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.

Nick Morrison's avatar

Nick Morrison

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

96.82%

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 Face-to-Face Weight Relative Weight
Jana Erdel 10/10 289 days true 104.12 100%
Walter van der Eng 10/10 523 days true 67.99 65%
Ron Stenhouse 8/10 1965 days true 4.57 4%
Elizabeth Stenhouse 9/10 1965 days true 4.57 4%
Enna Keet 8/10 2008 days true 4.5 4%
nathan_carr 10/10 2513 days 3.06 3%
neilqecosse 10/10 2543 days 3.02 3%
Frank & Margot Best 8/10 2679 days true 3.4 3%
Judith 7/10 2713 days true 3.34 3%
Jim & Rebecca 9/10 2719 days true 3.33 3%
Chris & Rob 8/10 3024 days true 2.83 3%
Bob Lenihan 10/10 3078 days true 2.74 3%
Jackie 10/10 3111 days true 2.69 3%
Sally Orr 10/10 3120 days 2.23 2%
Phillip Rurgger 9/10 3190 days true 2.56 2%
neilchelt 5/10 3212 days 2.1 2%
eowyn2k 10/10 3212 days 2.1 2%
Greg783 8/10 3396 days 1.85 2%
David 9/10 3426 days 1.81 2%
Nanou Van Beveren 9/10 3461 days 1.76 2%
Stephanie Schikora 10/10 3569 days 1.61 2%
Johannes Kerner 9/10 3575 days 1.6 2%
Christian 10/10 3813 days true 1.53 1%
Paul Weston 8/10 3819 days true 1.52 1%
Lyn Saxon 10/10 3911 days true 1.37 1%
Amanda McCaig 10/10 3913 days 1.14 1%
Fenke 9/10 4168 days true 0.95 1%
sasssy 10/10 5312 days 0.0 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 Dart River Jet Safaris experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-5.38% Adjustment

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

The Dart River Jet Safaris experience has been adjusted for 269 days. Adjustments are according to the following table.

Days Adjustment
266 -5.32%
267 -5.34%
268 -5.36%
269 -5.38%
270 -5.40%
271 -5.42%
272 -5.44%

Final Ranking Score

91%

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.