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
94.49%
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 | 161 days | 100% |
| Sophie R | 10/10 | 3013 days | 2% |
| Wilhelm Wiechel | 10/10 | 3097 days | 2% |
| Nienke Best | 9/10 | 3307 days | 1% |
| Bernd Giermann | 8/10 | 3408 days | 1% |
| Zak Jan | 9/10 | 3447 days | 1% |
| Romana Novotna | 8/10 | 3447 days | 1% |
| Tereza Nemeckova | 10/10 | 3456 days | 1% |
| Petr Sykora | 8/10 | 3456 days | 1% |
| Anna | 8/10 | 3460 days | 1% |
| Sherrie Fox | 9/10 | 3462 days | 1% |
| Felix | 9/10 | 3462 days | 1% |
| Lina Kiellamn | 8/10 | 3463 days | 1% |
| Marek | 9/10 | 3494 days | 1% |
| Kristin Pogue | 8/10 | 3695 days | 1% |
| Madelaine Sirch | 9/10 | 3704 days | 1% |
| Jonathan Maus | 8/10 | 3708 days | 1% |
| Lærke Hagelskjær | 8/10 | 3715 days | 1% |
| Alexandra Zwiers | 8/10 | 3719 days | 1% |
| Greta | 8/10 | 3751 days | 1% |
| Anna Guttle | 8/10 | 3765 days | 1% |
| Anais Touri | 8/10 | 3771 days | 1% |
| Kathanina Jasik | 7/10 | 3777 days | 0% |
| Ahmed Mohsen Aly | 7/10 | 3843 days | 0% |
| Caro G | 9/10 | 3849 days | 0% |
| Shona MacDonald | 8/10 | 4420 days | 0% |
| Sandra Frischmann | 9/10 | 4451 days | 0% |
| Carolin Kettler | 9/10 | 4468 days | 0% |
| Mirjam Betschart | 4/10 | 4468 days | 0% |
| Manuela Michelbach | 8/10 | 4471 days | 0% |
| Colin Evins | 8/10 | 4472 days | 0% |
| Janet Evins | 8/10 | 4472 days | 0% |
| F Ballard | 10/10 | 4480 days | 0% |
| Claire Lieval | 9/10 | 4501 days | 0% |
| Alan Blackburn | 10/10 | 4544 days | 0% |
| Christin Woelk | 9/10 | 4783 days | 0% |
| Dupont | 7/10 | 4825 days | 0% |
| Mathieu Brias | 9/10 | 4865 days | 0% |
| Ingrid | 9/10 | 4891 days | 0% |
| Sue Kieseker | 9/10 | 4894 days | 0% |
| Mark and Eefie | 8/10 | 4894 days | 0% |
| M Booty | 8/10 | 4896 days | 0% |
| Anne and John | 9/10 | 4908 days | 0% |
| Jill Boruff | 10/10 | 5178 days | 0% |
| Ron White | 10/10 | 5190 days | 0% |
| Jaap & Susanne | 9/10 | 5193 days | 0% |
| Lyn Deavin | 7/10 | 5196 days | 0% |
| Erik Poirer | 10/10 | 5198 days | 0% |
| Jon Winter | 10/10 | 5199 days | 0% |
| David & Sue Lokkerbol | 10/10 | 5199 days | 0% |
| Des & Ann Bidwell | 10/10 | 5208 days | 0% |
| Sally Rawson | 8/10 | 5224 days | 0% |
| David & Audrey | 10/10 | 5290 days | 0% |
| Steve Pearce | 8/10 | 5554 days | 0% |
| Derek Puplett | 10/10 | 5554 days | 0% |
| Belony | 10/10 | 5565 days | 0% |
| Andy | 8/10 | 5565 days | 0% |
| Forestal Youri | 10/10 | 5570 days | 0% |
| Gerry Nichols | 10/10 | 5573 days | 0% |
| Mary Van | 10/10 | 5731 days | 0% |
| Conny | 9/10 | 5849 days | 0% |
| Jesper Sch | 10/10 | 5897 days | 0% |
| OMPA | 10/10 | 5903 days | 0% |
| Janny en Bert | 8/10 | 5905 days | 0% |
| Peter Brown | 10/10 | 5911 days | 0% |
| Bob Kusesia | 9/10 | 5916 days | 0% |
| Johan | 8/10 | 5917 days | 0% |
| Jeanne Singuefreld | 8/10 | 5925 days | 0% |
| John Borneman | 9/10 | 5960 days | 0% |
| Dermot Bryne | 9/10 | 6028 days | 0% |
| andyge | 9/10 | 6035 days | 0% |
| AndyEngland | 8/10 | 6237 days | 0% |
| PamB | 10/10 | 6237 days | 0% |
| Andy Baker | 10/10 | 6269 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.