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 ZORB Rotorua.
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.
ZORB Rotorua
Valid Reviews
132 Valid Reviews
The ZORB Rotorua experience has a total of 134 reviews. There are 132 valid reviews that are included when calculating the ranking score and 2 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 132 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 27 |
|
20% |
| 9/10 | 17 |
|
13% |
| 8/10 | 38 |
|
29% |
| 7/10 | 26 |
|
20% |
| 6/10 | 13 |
|
10% |
| 5/10 | 5 |
|
4% |
| 4/10 | 4 |
|
3% |
| 3/10 | 2 |
|
2% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
78.33% Average
The raw data average (mean) for all the ZORB Rotorua valid reviews is 78.33% and is based on 132 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
120 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 132 valid reviews, the experience has 120 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 120 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 24 |
|
20% |
| 9/10 | 16 |
|
13% |
| 8/10 | 37 |
|
31% |
| 7/10 | 21 |
|
18% |
| 6/10 | 12 |
|
10% |
| 5/10 | 4 |
|
3% |
| 4/10 | 4 |
|
3% |
| 3/10 | 2 |
|
2% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
78.42% Average
The raw data average (mean) for all the ZORB Rotorua face-to-face reviews is 78.42% and is based on 120 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
80.23%
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 |
|---|---|---|---|
| Izzy | 7/10 | 1781 days | 100% |
| Auba Mateos | 10/10 | 2884 days | 61% |
| May | 10/10 | 2950 days | 58% |
| Nathan Raymond | 4/10 | 3212 days | 30% |
| Raylene Luison | 8/10 | 3220 days | 45% |
| Tamara | 10/10 | 3245 days | 45% |
| Brennan Jungling | 8/10 | 3251 days | 44% |
| Anita Wallace | 9/10 | 3251 days | 45% |
| Linda and Gunther | 10/10 | 3287 days | 44% |
| Janek Belcher | 8/10 | 3921 days | 17% |
| Robert Erni | 7/10 | 3922 days | 16% |
| Vanessa | 8/10 | 3941 days | 16% |
| Olivia | 8/10 | 3956 days | 15% |
| Callum | 8/10 | 3956 days | 15% |
| David Lee | 8/10 | 4321 days | 0% |
| Thibault Bonenfant | 10/10 | 4405 days | 19% |
| Lisa Blake | 8/10 | 4415 days | 19% |
| Elisabeth | 10/10 | 4696 days | 19% |
| Asha | 7/10 | 4734 days | 18% |
| Mark & Beth Kaufman | 8/10 | 4769 days | 19% |
| Harry Simpson | 10/10 | 4772 days | 19% |
| kirribilliangel | 7/10 | 4856 days | 18% |
| Dave van Bergen | 8/10 | 5004 days | 19% |
| Jennifer Holloway | 9/10 | 5014 days | 19% |
| Julia | 10/10 | 5023 days | 19% |
| Isabell | 7/10 | 5028 days | 18% |
| Tim | 6/10 | 5030 days | 16% |
| WeddingMaven | 9/10 | 5040 days | 19% |
| Natthien Le Gall | 7/10 | 5041 days | 18% |
| Paap | 8/10 | 5045 days | 19% |
| Wouter Jansen | 8/10 | 5045 days | 19% |
| Kat Fleming | 9/10 | 5054 days | 19% |
| Invictus | 8/10 | 5221 days | 19% |
| heather Cardinal | 3/10 | 5360 days | 9% |
| Mathias Skov | 6/10 | 5419 days | 16% |
| jameswhite | 8/10 | 5487 days | 19% |
| asiacritics | 6/10 | 5495 days | 16% |
| nancyburns | 7/10 | 5495 days | 18% |
| Lesley Nixon | 4/10 | 5505 days | 12% |
| Ash Sturm | 10/10 | 5525 days | 19% |
| clairet | 7/10 | 5604 days | 18% |
| BryonyS | 10/10 | 5727 days | 19% |
| Sofie | 8/10 | 5739 days | 19% |
| desl | 10/10 | 5739 days | 19% |
| Steve Harper | 7/10 | 5746 days | 18% |
| Yvanna | 8/10 | 5758 days | 19% |
| LucyPoland | 9/10 | 5760 days | 19% |
| Amelie | 8/10 | 5760 days | 19% |
| OllyD | 7/10 | 5768 days | 18% |
| JessicaS1 | 9/10 | 5771 days | 19% |
| TomC1 | 8/10 | 5772 days | 19% |
| TrevorK | 8/10 | 5772 days | 19% |
| AndyK | 10/10 | 5772 days | 19% |
| SarahK | 10/10 | 5772 days | 19% |
| FrancesG | 8/10 | 5772 days | 19% |
| RachelR | 10/10 | 5772 days | 19% |
| SofiaBrazil | 8/10 | 5772 days | 19% |
| EmmaL | 10/10 | 5772 days | 19% |
| Sarah | 9/10 | 5775 days | 19% |
| Ed | 8/10 | 5776 days | 19% |
| Carmel | 10/10 | 5779 days | 19% |
| Amanda Williams | 10/10 | 5779 days | 19% |
| Cilla | 10/10 | 5780 days | 19% |
| MayGermany | 6/10 | 5781 days | 16% |
| Craig | 10/10 | 5796 days | 19% |
| Florian | 10/10 | 5796 days | 19% |
| SonjaS | 8/10 | 5798 days | 19% |
| Mimi | 10/10 | 5804 days | 19% |
| Jasmine | 10/10 | 5805 days | 19% |
| Rose | 7/10 | 5805 days | 18% |
| Liz | 7/10 | 5811 days | 18% |
| Bonnie Turner | 5/10 | 5829 days | 14% |
| Stephanie | 9/10 | 5839 days | 19% |
| Sonja | 6/10 | 5844 days | 16% |
| Helen | 7/10 | 5852 days | 18% |
| Liekens | 7/10 | 5859 days | 18% |
| Evelyn | 10/10 | 5873 days | 19% |
| Michelle | 7/10 | 5913 days | 18% |
| Chris | 10/10 | 5914 days | 19% |
| Dave | 8/10 | 5929 days | 19% |
| Anna | 10/10 | 5937 days | 19% |
| Ele | 10/10 | 5964 days | 19% |
| Brent Scanlan | 8/10 | 6081 days | 19% |
| Bernie | 9/10 | 6125 days | 19% |
| Emily Houston | 8/10 | 6136 days | 19% |
| Gina | 8/10 | 6148 days | 19% |
| Julie | 7/10 | 6148 days | 18% |
| Katharina | 9/10 | 6151 days | 19% |
| Chris | 4/10 | 6164 days | 12% |
| Andre Obineche | 8/10 | 6179 days | 19% |
| Clive | 7/10 | 6179 days | 18% |
| Lindsey Woosnam | 9/10 | 6182 days | 19% |
| Anu | 5/10 | 6185 days | 14% |
| Lanni | 7/10 | 6186 days | 18% |
| Andrew | 8/10 | 6186 days | 19% |
| Andrew Porter | 6/10 | 6187 days | 16% |
| Pete | 7/10 | 6228 days | 18% |
| Orla | 6/10 | 6229 days | 16% |
| Richard Kindgren | 7/10 | 6231 days | 18% |
| Miriam&Eva | 6/10 | 6429 days | 16% |
| HalRoberts | 7/10 | 6451 days | 18% |
| Will | 8/10 | 6455 days | 19% |
| Helen | 9/10 | 6457 days | 19% |
| Heather | 10/10 | 6457 days | 19% |
| Matt | 8/10 | 6457 days | 19% |
| Richard | 7/10 | 6457 days | 18% |
| ShoshanaAbrams | 9/10 | 6460 days | 19% |
| Elaine | 8/10 | 6460 days | 19% |
| Gwen | 4/10 | 6463 days | 12% |
| Matt | 9/10 | 6467 days | 19% |
| Gillian | 6/10 | 6468 days | 16% |
| Lorraine | 6/10 | 6475 days | 16% |
| Jack | 5/10 | 6475 days | 14% |
| Jen | 6/10 | 6475 days | 16% |
| TrineLyst | 8/10 | 6476 days | 19% |
| Sean | 5/10 | 6479 days | 14% |
| Marcus | 7/10 | 6479 days | 18% |
| Katie | 7/10 | 6479 days | 18% |
| Dan | 8/10 | 6480 days | 19% |
| Sarah | 7/10 | 6480 days | 18% |
| Emma Gareth | 8/10 | 6491 days | 19% |
| MariaNorman | 8/10 | 6495 days | 19% |
| MarcHarris | 8/10 | 6495 days | 19% |
| Tom | 8/10 | 6504 days | 19% |
| Lucy | 9/10 | 6504 days | 19% |
| Nissa | 9/10 | 6504 days | 19% |
| Suzy | 7/10 | 6509 days | 18% |
| Nina | 6/10 | 6511 days | 16% |
| Inga | 5/10 | 6511 days | 14% |
| FredAndersson | 6/10 | 6515 days | 16% |
| Cat | 9/10 | 6517 days | 19% |
| SallySpencer | 3/10 | 6530 days | 9% |
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 ZORB Rotorua experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the ZORB Rotorua 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 ZORB Rotorua experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
4.20% 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
80%
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.