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
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
94.45%
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 | 106 days | 100% |
| Sophie R | 10/10 | 2958 days | 3% |
| Wilhelm Wiechel | 10/10 | 3042 days | 3% |
| Nienke Best | 9/10 | 3252 days | 2% |
| Bernd Giermann | 8/10 | 3353 days | 2% |
| Zak Jan | 9/10 | 3392 days | 2% |
| Romana Novotna | 8/10 | 3392 days | 2% |
| Tereza Nemeckova | 10/10 | 3401 days | 2% |
| Petr Sykora | 8/10 | 3401 days | 2% |
| Anna | 8/10 | 3405 days | 2% |
| Sherrie Fox | 9/10 | 3407 days | 2% |
| Felix | 9/10 | 3407 days | 2% |
| Lina Kiellamn | 8/10 | 3408 days | 2% |
| Marek | 9/10 | 3439 days | 2% |
| Kristin Pogue | 8/10 | 3640 days | 1% |
| Madelaine Sirch | 9/10 | 3649 days | 1% |
| Jonathan Maus | 8/10 | 3653 days | 1% |
| Lærke Hagelskjær | 8/10 | 3660 days | 1% |
| Alexandra Zwiers | 8/10 | 3664 days | 1% |
| Greta | 8/10 | 3696 days | 1% |
| Anna Guttle | 8/10 | 3710 days | 1% |
| Anais Touri | 8/10 | 3716 days | 1% |
| Kathanina Jasik | 7/10 | 3722 days | 1% |
| Ahmed Mohsen Aly | 7/10 | 3788 days | 1% |
| Caro G | 9/10 | 3794 days | 1% |
| Shona MacDonald | 8/10 | 4365 days | 0% |
| Sandra Frischmann | 9/10 | 4396 days | 1% |
| Carolin Kettler | 9/10 | 4413 days | 1% |
| Mirjam Betschart | 4/10 | 4413 days | 1% |
| Manuela Michelbach | 8/10 | 4416 days | 1% |
| Colin Evins | 8/10 | 4417 days | 1% |
| Janet Evins | 8/10 | 4417 days | 1% |
| F Ballard | 10/10 | 4425 days | 1% |
| Claire Lieval | 9/10 | 4446 days | 1% |
| Alan Blackburn | 10/10 | 4489 days | 1% |
| Christin Woelk | 9/10 | 4728 days | 1% |
| Dupont | 7/10 | 4770 days | 1% |
| Mathieu Brias | 9/10 | 4810 days | 1% |
| Ingrid | 9/10 | 4836 days | 1% |
| Sue Kieseker | 9/10 | 4839 days | 1% |
| Mark and Eefie | 8/10 | 4839 days | 1% |
| M Booty | 8/10 | 4841 days | 1% |
| Anne and John | 9/10 | 4853 days | 1% |
| Jill Boruff | 10/10 | 5123 days | 1% |
| Ron White | 10/10 | 5135 days | 1% |
| Jaap & Susanne | 9/10 | 5138 days | 1% |
| Lyn Deavin | 7/10 | 5141 days | 1% |
| Erik Poirer | 10/10 | 5143 days | 1% |
| Jon Winter | 10/10 | 5144 days | 1% |
| David & Sue Lokkerbol | 10/10 | 5144 days | 1% |
| Des & Ann Bidwell | 10/10 | 5153 days | 1% |
| Sally Rawson | 8/10 | 5169 days | 1% |
| David & Audrey | 10/10 | 5235 days | 1% |
| Steve Pearce | 8/10 | 5499 days | 1% |
| Derek Puplett | 10/10 | 5499 days | 1% |
| Belony | 10/10 | 5510 days | 1% |
| Andy | 8/10 | 5510 days | 1% |
| Forestal Youri | 10/10 | 5515 days | 1% |
| Gerry Nichols | 10/10 | 5518 days | 1% |
| Mary Van | 10/10 | 5676 days | 1% |
| Conny | 9/10 | 5794 days | 1% |
| Jesper Sch | 10/10 | 5842 days | 1% |
| OMPA | 10/10 | 5848 days | 1% |
| Janny en Bert | 8/10 | 5850 days | 1% |
| Peter Brown | 10/10 | 5856 days | 1% |
| Bob Kusesia | 9/10 | 5861 days | 1% |
| Johan | 8/10 | 5862 days | 1% |
| Jeanne Singuefreld | 8/10 | 5870 days | 1% |
| John Borneman | 9/10 | 5905 days | 1% |
| Dermot Bryne | 9/10 | 5973 days | 1% |
| andyge | 9/10 | 5980 days | 1% |
| AndyEngland | 8/10 | 6182 days | 1% |
| PamB | 10/10 | 6182 days | 1% |
| Andy Baker | 10/10 | 6214 days | 1% |
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
0.49% 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.