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.
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
86.58%
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 | 3429 days | 100% |
| Zak Jan | 7/10 | 3468 days | 88% |
| Tereza Nemeckova | 10/10 | 3477 days | 95% |
| Anna | 9/10 | 3483 days | 93% |
| Anna Urbanova | 8/10 | 3515 days | 88% |
| Melle Eleinga | 8/10 | 3640 days | 72% |
| Camilla Geert | 7/10 | 3724 days | 56% |
| Madelaine Sirch | 9/10 | 3725 days | 61% |
| Lisa Fenzl | 6/10 | 3732 days | 50% |
| Lionel Seramis | 9/10 | 3750 days | 58% |
| Anna Guttle | 8/10 | 3786 days | 53% |
| Tarillon Family | 9/10 | 4100 days | 13% |
| Kilian Vos | 7/10 | 4185 days | 0% |
| Ara Moore-Tuwhangai | 10/10 | 4383 days | 43% |
| angela neilsen | 10/10 | 4383 days | 43% |
| Manuela | 9/10 | 4444 days | 43% |
| Siobhan Mee | 10/10 | 4474 days | 43% |
| Fenna Newmann | 8/10 | 4482 days | 42% |
| Mara K | 9/10 | 4503 days | 43% |
| Julien de la lande | 8/10 | 4516 days | 42% |
| Aude Moulin | 10/10 | 4516 days | 43% |
| Claire Lieval | 10/10 | 4522 days | 43% |
| Pia Pitkala | 9/10 | 4829 days | 43% |
| Kevin Tranter | 9/10 | 4847 days | 43% |
| Peter Simpson | 10/10 | 4868 days | 43% |
| Mathieu Brias | 8/10 | 4886 days | 42% |
| Eric and Jen Popma | 10/10 | 4940 days | 43% |
| TheClan | 10/10 | 5021 days | 43% |
| Matthias Angela | 7/10 | 5199 days | 39% |
| Signe Kaspersen | 10/10 | 5199 days | 43% |
| Jaap & Susanne | 9/10 | 5214 days | 43% |
| Rene Jakel | 9/10 | 5567 days | 43% |
| Elise van Haastert | 9/10 | 5570 days | 43% |
| Stevenson | 10/10 | 5592 days | 43% |
| Friedli Manuela | 10/10 | 5594 days | 43% |
| Rosey834 | 10/10 | 5630 days | 43% |
| Janny en Bert | 8/10 | 5926 days | 42% |
| johnandgin | 10/10 | 5936 days | 43% |
| Tanya Fitzgibbon | 5/10 | 5937 days | 27% |
| Dutertre Annaboue | 7/10 | 5937 days | 39% |
| Jules | 7/10 | 5961 days | 39% |
| Rob | 9/10 | 5962 days | 43% |
| Frances Hay | 8/10 | 5963 days | 42% |
| Suzanne | 9/10 | 6087 days | 43% |
| bertel | 10/10 | 6153 days | 43% |
| DustyLaptop | 9/10 | 6209 days | 43% |
| TillE412 | 10/10 | 6254 days | 43% |
| geoffelizabeth | 9/10 | 6270 days | 43% |
| MarkP | 8/10 | 6270 days | 42% |
| Visken | 10/10 | 6313 days | 43% |
| David_H | 8/10 | 6329 days | 42% |
| Temo | 7/10 | 6518 days | 39% |
| Georgina Mulligan | 7/10 | 6590 days | 39% |
| Sandra Verbaarschot | 9/10 | 6650 days | 43% |
| Yayami Kimura | 7/10 | 6653 days | 39% |
| Ray | 10/10 | 6656 days | 43% |
| Eon Alers | 7/10 | 6660 days | 39% |
| Orla Hansen | 10/10 | 6662 days | 43% |
| Paul McDonell | 8/10 | 6662 days | 42% |
| Jurgen Westphal | 8/10 | 6670 days | 42% |
| Roger & Margaret | 9/10 | 6670 days | 43% |
| Matthieu Gernez | 6/10 | 6671 days | 34% |
| Withkin | 10/10 | 6671 days | 43% |
| Wayne Best | 8/10 | 6706 days | 42% |
| Gabriel Faber | 9/10 | 6745 days | 43% |
| Renee | 7/10 | 7010 days | 39% |
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
-2.45% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 106 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 | -2.42% |
| 198 | -2.43% |
| 199 | -2.44% |
| 200 | -2.45% |
| 201 | -2.46% |
| 202 | -2.48% |
| 203 | -2.49% |
| … | … |
Balancing Adjustment
2.00% 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
86%
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.