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 Christchurch Botanic Gardens.
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.
Christchurch Botanic Gardens
Valid Reviews
74 Valid Reviews
The Christchurch Botanic Gardens experience has a total of 74 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 74 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 23 |
|
31% |
| 9/10 | 21 |
|
28% |
| 8/10 | 25 |
|
34% |
| 7/10 | 4 |
|
5% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 1 |
|
1% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
87.97% Average
The raw data average (mean) for all the Christchurch Botanic Gardens valid reviews is 87.97% and is based on 74 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
66 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 74 valid reviews, the experience has 66 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 66 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 19 |
|
29% |
| 9/10 | 18 |
|
27% |
| 8/10 | 25 |
|
38% |
| 7/10 | 3 |
|
5% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 1 |
|
2% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
87.42% Average
The raw data average (mean) for all the Christchurch Botanic Gardens face-to-face reviews is 87.42% and is based on 66 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
94.48%
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 |
|---|---|---|---|
| Marja | 10/10 | 121 days | 100% |
| Sophie R | 10/10 | 2973 days | 2% |
| Wilhelm Wiechel | 10/10 | 3057 days | 2% |
| Nienke Best | 9/10 | 3266 days | 2% |
| Bernd Giermann | 8/10 | 3368 days | 1% |
| Zak Jan | 9/10 | 3407 days | 1% |
| Romana Novotna | 8/10 | 3407 days | 1% |
| Tereza Nemeckova | 10/10 | 3416 days | 1% |
| Petr Sykora | 8/10 | 3416 days | 1% |
| Anna | 8/10 | 3420 days | 1% |
| Sherrie Fox | 9/10 | 3422 days | 1% |
| Felix | 9/10 | 3422 days | 1% |
| Lina Kiellamn | 8/10 | 3423 days | 1% |
| Marek | 9/10 | 3454 days | 1% |
| Kristin Pogue | 8/10 | 3655 days | 1% |
| Madelaine Sirch | 9/10 | 3664 days | 1% |
| Jonathan Maus | 8/10 | 3668 days | 1% |
| Lærke Hagelskjær | 8/10 | 3675 days | 1% |
| Alexandra Zwiers | 8/10 | 3679 days | 1% |
| Greta | 8/10 | 3711 days | 1% |
| Anna Guttle | 8/10 | 3725 days | 1% |
| Anais Touri | 8/10 | 3731 days | 1% |
| Kathanina Jasik | 7/10 | 3737 days | 1% |
| Ahmed Mohsen Aly | 7/10 | 3803 days | 0% |
| Caro G | 9/10 | 3809 days | 0% |
| Shona MacDonald | 8/10 | 4380 days | 0% |
| Sandra Frischmann | 9/10 | 4411 days | 0% |
| Carolin Kettler | 9/10 | 4428 days | 0% |
| Mirjam Betschart | 4/10 | 4428 days | 0% |
| Manuela Michelbach | 8/10 | 4431 days | 0% |
| Colin Evins | 8/10 | 4432 days | 0% |
| Janet Evins | 8/10 | 4432 days | 0% |
| F Ballard | 10/10 | 4440 days | 0% |
| Claire Lieval | 9/10 | 4461 days | 0% |
| Alan Blackburn | 10/10 | 4504 days | 0% |
| Christin Woelk | 9/10 | 4743 days | 0% |
| Dupont | 7/10 | 4785 days | 0% |
| Mathieu Brias | 9/10 | 4825 days | 0% |
| Ingrid | 9/10 | 4851 days | 0% |
| Sue Kieseker | 9/10 | 4854 days | 0% |
| Mark and Eefie | 8/10 | 4854 days | 0% |
| M Booty | 8/10 | 4856 days | 0% |
| Anne and John | 9/10 | 4868 days | 0% |
| Jill Boruff | 10/10 | 5138 days | 0% |
| Ron White | 10/10 | 5150 days | 0% |
| Jaap & Susanne | 9/10 | 5153 days | 0% |
| Lyn Deavin | 7/10 | 5156 days | 0% |
| Erik Poirer | 10/10 | 5158 days | 0% |
| Jon Winter | 10/10 | 5159 days | 0% |
| David & Sue Lokkerbol | 10/10 | 5159 days | 0% |
| Des & Ann Bidwell | 10/10 | 5168 days | 0% |
| Sally Rawson | 8/10 | 5184 days | 0% |
| David & Audrey | 10/10 | 5250 days | 0% |
| Steve Pearce | 8/10 | 5514 days | 0% |
| Derek Puplett | 10/10 | 5514 days | 0% |
| Belony | 10/10 | 5525 days | 0% |
| Andy | 8/10 | 5525 days | 0% |
| Forestal Youri | 10/10 | 5530 days | 0% |
| Gerry Nichols | 10/10 | 5533 days | 0% |
| Mary Van | 10/10 | 5690 days | 0% |
| Conny | 9/10 | 5808 days | 0% |
| Jesper Sch | 10/10 | 5857 days | 0% |
| OMPA | 10/10 | 5863 days | 0% |
| Janny en Bert | 8/10 | 5865 days | 0% |
| Peter Brown | 10/10 | 5871 days | 0% |
| Bob Kusesia | 9/10 | 5876 days | 0% |
| Johan | 8/10 | 5877 days | 0% |
| Jeanne Singuefreld | 8/10 | 5885 days | 0% |
| John Borneman | 9/10 | 5920 days | 0% |
| Dermot Bryne | 9/10 | 5988 days | 0% |
| andyge | 9/10 | 5995 days | 0% |
| AndyEngland | 8/10 | 6196 days | 0% |
| PamB | 10/10 | 6196 days | 0% |
| Andy Baker | 10/10 | 6229 days | 0% |
Adjustments
No Adjustment
Several adjustments to the weighted average may be added to improve relevancy and credibility. Christchurch Botanic Gardens does not meet the criteria for any of these adjustments to apply.
Balancing Adjustment
0.48% 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 folk 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
95%
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.