Hi, 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
73 Valid Reviews
The Christchurch Botanic Gardens experience has a total of 73 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 73 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 22 |
|
30% |
| 9/10 | 21 |
|
29% |
| 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% |
87.81% Average
The raw data average (mean) for all the Christchurch Botanic Gardens valid reviews is 87.81% and is based on 73 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 73 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
87.58%
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 |
|---|---|---|---|
| Sophie R | 10/10 | 2477 days | 100% |
| Wilhelm Wiechel | 10/10 | 2561 days | 96% |
| Nienke Best | 9/10 | 2771 days | 84% |
| Bernd Giermann | 8/10 | 2872 days | 78% |
| Zak Jan | 9/10 | 2911 days | 76% |
| Romana Novotna | 8/10 | 2911 days | 76% |
| Tereza Nemeckova | 10/10 | 2920 days | 77% |
| Petr Sykora | 8/10 | 2920 days | 75% |
| Anna | 8/10 | 2924 days | 75% |
| Sherrie Fox | 9/10 | 2926 days | 76% |
| Felix | 9/10 | 2926 days | 76% |
| Lina Kiellamn | 8/10 | 2927 days | 75% |
| Marek | 9/10 | 2958 days | 74% |
| Kristin Pogue | 8/10 | 3159 days | 63% |
| Madelaine Sirch | 9/10 | 3168 days | 63% |
| Jonathan Maus | 8/10 | 3172 days | 62% |
| Lærke Hagelskjær | 8/10 | 3179 days | 62% |
| Alexandra Zwiers | 8/10 | 3183 days | 61% |
| Greta | 8/10 | 3215 days | 60% |
| Anna Guttle | 8/10 | 3229 days | 59% |
| Anais Touri | 8/10 | 3235 days | 59% |
| Kathanina Jasik | 7/10 | 3241 days | 56% |
| Ahmed Mohsen Aly | 7/10 | 3307 days | 52% |
| Caro G | 9/10 | 3313 days | 55% |
| Shona MacDonald | 8/10 | 3884 days | 25% |
| Sandra Frischmann | 9/10 | 3915 days | 24% |
| Carolin Kettler | 9/10 | 3932 days | 23% |
| Mirjam Betschart | 4/10 | 3932 days | 15% |
| Manuela Michelbach | 8/10 | 3935 days | 23% |
| Colin Evins | 8/10 | 3936 days | 23% |
| Janet Evins | 8/10 | 3936 days | 23% |
| F Ballard | 10/10 | 3944 days | 23% |
| Claire Lieval | 9/10 | 3965 days | 21% |
| Alan Blackburn | 10/10 | 4008 days | 19% |
| Christin Woelk | 9/10 | 4247 days | 7% |
| Dupont | 7/10 | 4289 days | 4% |
| Mathieu Brias | 9/10 | 4329 days | 2% |
| Ingrid | 9/10 | 4355 days | 1% |
| Sue Kieseker | 9/10 | 4358 days | 1% |
| Mark and Eefie | 8/10 | 4358 days | 1% |
| M Booty | 8/10 | 4360 days | 1% |
| Anne and John | 9/10 | 4372 days | 0% |
| Jill Boruff | 10/10 | 4642 days | 27% |
| Ron White | 10/10 | 4654 days | 27% |
| Jaap & Susanne | 9/10 | 4657 days | 26% |
| Lyn Deavin | 7/10 | 4660 days | 25% |
| Erik Poirer | 10/10 | 4662 days | 27% |
| Jon Winter | 10/10 | 4663 days | 27% |
| David & Sue Lokkerbol | 10/10 | 4663 days | 27% |
| Des & Ann Bidwell | 10/10 | 4672 days | 27% |
| Sally Rawson | 8/10 | 4688 days | 26% |
| David & Audrey | 10/10 | 4754 days | 27% |
| Steve Pearce | 8/10 | 5018 days | 26% |
| Derek Puplett | 10/10 | 5018 days | 27% |
| Belony | 10/10 | 5029 days | 27% |
| Andy | 8/10 | 5029 days | 26% |
| Forestal Youri | 10/10 | 5034 days | 27% |
| Gerry Nichols | 10/10 | 5037 days | 27% |
| Mary Van | 10/10 | 5195 days | 27% |
| Conny | 9/10 | 5313 days | 26% |
| Jesper Sch | 10/10 | 5361 days | 27% |
| OMPA | 10/10 | 5367 days | 27% |
| Janny en Bert | 8/10 | 5369 days | 26% |
| Peter Brown | 10/10 | 5375 days | 27% |
| Bob Kusesia | 9/10 | 5380 days | 26% |
| Johan | 8/10 | 5381 days | 26% |
| Jeanne Singuefreld | 8/10 | 5389 days | 26% |
| John Borneman | 9/10 | 5424 days | 26% |
| Dermot Bryne | 9/10 | 5492 days | 26% |
| andyge | 9/10 | 5499 days | 26% |
| AndyEngland | 8/10 | 5701 days | 26% |
| PamB | 10/10 | 5701 days | 27% |
| Andy Baker | 10/10 | 5733 days | 27% |
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
1.36% 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
89%
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.