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 Christchurch Gondola.

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

Christchurch Gondola

Valid Reviews

45 Valid Reviews

The Christchurch Gondola experience has a total of 45 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 45 valid reviews:

Rating Count Percentage
10/10 2
4%
9/10 5
11%
8/10 19
42%
7/10 11
24%
6/10 3
7%
5/10 4
9%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 1
2%

74.00% Average

The raw data average (mean) for all the Christchurch Gondola valid reviews is 74.00% and is based on 45 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

41 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 45 valid reviews, the experience has 41 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 41 face-to-face reviews:

Rating Count Percentage
10/10 2
5%
9/10 5
12%
8/10 16
39%
7/10 11
27%
6/10 3
7%
5/10 3
7%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 1
2%

74.15% Average

The raw data average (mean) for all the Christchurch Gondola face-to-face reviews is 74.15% and is based on 41 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

76.27%

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
Theresa Slaghekke 7/10 1316 days true 4.16 91%
Bastian Bley 8/10 1316 days true 4.34 95%
Elien Dauwe 7/10 1322 days true 4.15 91%
Tereza Nemeckova 10/10 1323 days true 4.55 100%
Sophia Satter 6/10 1357 days true 3.72 82%
Judith 8/10 1591 days true 3.83 84%
Tamara 8/10 1622 days true 3.77 83%
Evie Sel 8/10 1682 days true 3.66 80%
Sally Schist 5/10 2344 days true 2.07 45%
Rob Hitsert 8/10 3409 days true 0.45 10%
Eva Bock 8/10 3420 days true 0.43 9%
Fabian 7/10 3436 days true 0.38 8%
nuwee 8/10 3751 days 0.0 0%
Jenny 7/10 3790 days true 0.0 0%
Brenda Brelinski 6/10 3804 days true 0.0 0%
Norbert Hainz 8/10 3823 days true 0.0 0%
Greg Kennedy 10/10 3829 days true 0.0 0%
stafanie_norman 8/10 3856 days true 0.0 0%
carolyns 9/10 3857 days true 0.0 0%
kencook 9/10 3876 days true 0.0 0%
Simon Bartholomew 8/10 3884 days true 0.0 0%
Dermot Bryne 7/10 3895 days true 0.0 0%
DustyLaptop 8/10 4055 days 0.0 0%
LizG 7/10 4114 days true 0.0 0%
RachaelO 8/10 4166 days true 0.0 0%
CharlotteC 8/10 4171 days true 0.0 0%
Thomas 9/10 4225 days true 0.0 0%
Julia 7/10 4247 days true 0.0 0%
Paul 1/10 4280 days true 0.0 0%
Louise 8/10 4323 days true 0.0 0%
Christine 6/10 4369 days true 0.0 0%
CollyBob 9/10 4389 days true 0.0 0%
Mark 7/10 4486 days true 0.0 0%
Richard 8/10 4500 days true 0.0 0%
Ben Ackland 5/10 4503 days true 0.0 0%
Paul Weston 7/10 4509 days true 0.0 0%
Roger & Margaret 8/10 4517 days 0.0 0%
Lisa Tame 5/10 4517 days true 0.0 0%
Jim Curley 9/10 4528 days true 0.0 0%
Gravesteyn 7/10 4532 days true 0.0 0%
Wayne Best 8/10 4552 days true 0.0 0%
Maruja 8/10 4559 days true 0.0 0%
Rob Boston 5/10 4664 days 0.0 0%
Hanna Tidebrant 8/10 4683 days true 0.0 0%
Sandra 7/10 4886 days true 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 Christchurch Gondola experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.01% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 124 days. However the Christchurch Gondola 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 Christchurch Gondola experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -1.98%
198 -1.99%
199 -2.00%
200 -2.01%
201 -2.02%
202 -2.03%
203 -2.04%

Final Ranking Score

74%

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.