Kia ora, 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 Canterbury Museum.

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's avatar

Cymen Crick

Rankers Owner

Canterbury Museum

Valid Reviews

66 Valid Reviews

The Canterbury Museum experience has a total of 66 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 66 valid reviews:

Rating Count Percentage
10/10 20
30%
9/10 19
29%
8/10 13
20%
7/10 11
17%
6/10 2
3%
5/10 1
2%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

86.21% Average

The raw data average (mean) for all the Canterbury Museum valid reviews is 86.21% and is based on 66 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

56 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 66 valid reviews, the experience has 56 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 56 face-to-face reviews:

Rating Count Percentage
10/10 15
27%
9/10 15
27%
8/10 13
23%
7/10 10
18%
6/10 2
4%
5/10 1
2%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

85.00% Average

The raw data average (mean) for all the Canterbury Museum face-to-face reviews is 85.00% and is based on 56 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

85.67%

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
Susanne 9/10 2963 days 100%
Zak Jan 7/10 3002 days 91%
Tereza Nemeckova 10/10 3011 days 98%
Anna 9/10 3017 days 96%
Anna Urbanova 8/10 3049 days 93%
Melle Eleinga 8/10 3174 days 84%
Camilla Geert 7/10 3258 days 74%
Madelaine Sirch 9/10 3259 days 79%
Lisa Fenzl 6/10 3266 days 68%
Lionel Seramis 9/10 3284 days 77%
Anna Guttle 8/10 3320 days 74%
Tarillon Family 9/10 3634 days 52%
Kilian Vos 7/10 3719 days 43%
Ara Moore-Tuwhangai 10/10 3917 days 32%
angela neilsen 10/10 3917 days 32%
Manuela 9/10 3978 days 28%
Siobhan Mee 10/10 4008 days 26%
Fenna Newmann 8/10 4016 days 25%
Mara K 9/10 4037 days 23%
Julien de la lande 8/10 4050 days 22%
Aude Moulin 10/10 4050 days 23%
Claire Lieval 10/10 4056 days 22%
Pia Pitkala 9/10 4363 days 0%
Kevin Tranter 9/10 4381 days 35%
Peter Simpson 10/10 4402 days 36%
Mathieu Brias 8/10 4420 days 35%
Eric and Jen Popma 10/10 4474 days 36%
TheClan 10/10 4555 days 36%
Matthias Angela 7/10 4733 days 33%
Signe Kaspersen 10/10 4733 days 36%
Jaap & Susanne 9/10 4748 days 35%
Rene Jakel 9/10 5101 days 35%
Elise van Haastert 9/10 5104 days 35%
Stevenson 10/10 5126 days 36%
Friedli Manuela 10/10 5128 days 36%
Rosey834 10/10 5164 days 36%
Janny en Bert 8/10 5460 days 35%
johnandgin 10/10 5470 days 36%
Tanya Fitzgibbon 5/10 5471 days 27%
Dutertre Annaboue 7/10 5471 days 33%
Jules 7/10 5495 days 33%
Rob 9/10 5496 days 35%
Frances Hay 8/10 5497 days 35%
Suzanne 9/10 5621 days 35%
bertel 10/10 5687 days 36%
DustyLaptop 9/10 5743 days 35%
TillE412 10/10 5788 days 36%
geoffelizabeth 9/10 5804 days 35%
MarkP 8/10 5804 days 35%
Visken 10/10 5847 days 36%
David_H 8/10 5863 days 35%
Temo 7/10 6052 days 33%
Georgina Mulligan 7/10 6124 days 33%
Sandra Verbaarschot 9/10 6184 days 35%
Yayami Kimura 7/10 6187 days 33%
Ray 10/10 6190 days 36%
Eon Alers 7/10 6194 days 33%
Orla Hansen 10/10 6196 days 36%
Paul McDonell 8/10 6196 days 35%
Jurgen Westphal 8/10 6204 days 35%
Roger & Margaret 9/10 6205 days 35%
Matthieu Gernez 6/10 6205 days 31%
Withkin 10/10 6205 days 36%
Wayne Best 8/10 6240 days 35%
Gabriel Faber 9/10 6279 days 35%
Renee 7/10 6544 days 33%

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 Canterbury Museum experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.14% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 53 days. However the Canterbury Museum 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 Canterbury Museum experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.08%
198 -4.10%
199 -4.12%
200 -4.14%
201 -4.16%
202 -4.19%
203 -4.21%

Balancing Adjustment

2.60% 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

84%

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.