Hey, 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 Waitangi Treaty Grounds.
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.
Waitangi Treaty Grounds
Valid Reviews
91 Valid Reviews
The Waitangi Treaty Grounds experience has a total of 91 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 91 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 19 |
|
21% |
| 9/10 | 23 |
|
25% |
| 8/10 | 25 |
|
27% |
| 7/10 | 11 |
|
12% |
| 6/10 | 3 |
|
3% |
| 5/10 | 7 |
|
8% |
| 4/10 | 1 |
|
1% |
| 3/10 | 1 |
|
1% |
| 2/10 | 0 |
|
0% |
| 1/10 | 1 |
|
1% |
80.77% Average
The raw data average (mean) for all the Waitangi Treaty Grounds valid reviews is 80.77% and is based on 91 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
73 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 91 valid reviews, the experience has 73 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 73 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 11 |
|
15% |
| 9/10 | 21 |
|
29% |
| 8/10 | 20 |
|
27% |
| 7/10 | 10 |
|
14% |
| 6/10 | 3 |
|
4% |
| 5/10 | 6 |
|
8% |
| 4/10 | 1 |
|
1% |
| 3/10 | 1 |
|
1% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
80.00% Average
The raw data average (mean) for all the Waitangi Treaty Grounds face-to-face reviews is 80.00% and is based on 73 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
89.70%
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 |
|---|---|---|---|
| Chel | 8/10 | 494 days | 100% |
| Valerie V | 10/10 | 768 days | 79% |
| Cam | 10/10 | 768 days | 79% |
| Penny Bullock | 10/10 | 2563 days | 4% |
| Nigel Jarvis | 10/10 | 2625 days | 4% |
| Janneke van Krieken | 8/10 | 2958 days | 3% |
| William Milligan-Manby | 10/10 | 3098 days | 3% |
| dan dalgleish | 10/10 | 3203 days | 3% |
| Melanie Farrell | 9/10 | 3213 days | 3% |
| Charlotte | 8/10 | 3240 days | 2% |
| Vicki Robey | 8/10 | 3304 days | 2% |
| Michal Za'heryuk | 9/10 | 3324 days | 2% |
| Veronika Za'heryuk | 9/10 | 3324 days | 2% |
| Thomas Nolwenn | 9/10 | 3329 days | 2% |
| Manibod Vannaphone | 10/10 | 3566 days | 2% |
| Luca Staudt | 7/10 | 3569 days | 2% |
| Nancy Logan | 8/10 | 3573 days | 2% |
| Friederike East | 9/10 | 3594 days | 2% |
| Sabine Bergen | 8/10 | 3611 days | 2% |
| Ken | 5/10 | 3925 days | 1% |
| Fanny DeBon | 7/10 | 4023 days | 1% |
| Ian Garner | 9/10 | 4313 days | 0% |
| Laurene | 5/10 | 4320 days | 0% |
| Guillaume | 6/10 | 4324 days | 0% |
| Sarah Horn | 9/10 | 4653 days | 1% |
| Sebastian Russell-Smits | 10/10 | 4653 days | 1% |
| Leo | 9/10 | 4759 days | 1% |
| Reinhard Stahl | 10/10 | 4760 days | 1% |
| Reinhard Stahl | 10/10 | 4760 days | 1% |
| Liz Marquart Scholtz | 8/10 | 4766 days | 1% |
| Kerstin | 9/10 | 4770 days | 1% |
| KDS_Holiday | 10/10 | 4816 days | 1% |
| Mark Westebring | 7/10 | 5017 days | 1% |
| ToGy | 1/10 | 5030 days | 0% |
| Barry Baily | 9/10 | 5043 days | 1% |
| Charlotte | 9/10 | 5045 days | 1% |
| John Reynolds | 10/10 | 5054 days | 1% |
| Ellen Jacobs | 5/10 | 5057 days | 1% |
| Peter, Noelle & Susanne | 6/10 | 5124 days | 1% |
| damaca | 7/10 | 5182 days | 1% |
| Oliver Berg | 7/10 | 5379 days | 1% |
| Boi Sagarra | 6/10 | 5379 days | 1% |
| Chris Ashton | 8/10 | 5390 days | 1% |
| Edgar & Marilyn Berry | 10/10 | 5392 days | 1% |
| John Taylor | 10/10 | 5395 days | 1% |
| Ann Parry | 9/10 | 5400 days | 1% |
| Peter | 9/10 | 5401 days | 1% |
| David | 9/10 | 5414 days | 1% |
| Rossiter | 7/10 | 5417 days | 1% |
| Rosey834 | 8/10 | 5486 days | 1% |
| Hans | 8/10 | 5751 days | 1% |
| Michael Egli | 9/10 | 5752 days | 1% |
| Aaron | 5/10 | 5771 days | 1% |
| Mieke Knoops | 7/10 | 5771 days | 1% |
| Tonny | 8/10 | 5788 days | 1% |
| snodge | 5/10 | 5789 days | 1% |
| uleugel | 8/10 | 5798 days | 1% |
| Len Daniell | 9/10 | 5803 days | 1% |
| kevinp | 7/10 | 5832 days | 1% |
| Anita de Boer | 8/10 | 5853 days | 1% |
| Karin Linder | 9/10 | 5855 days | 1% |
| richardh | 8/10 | 5976 days | 1% |
| Christine Dadd | 4/10 | 6083 days | 1% |
| MorganK | 8/10 | 6087 days | 1% |
| arthurwa | 10/10 | 6095 days | 1% |
| Robert | 5/10 | 6118 days | 1% |
| KeziaB | 9/10 | 6128 days | 1% |
| EleanorL | 7/10 | 6128 days | 1% |
| VickiS | 7/10 | 6128 days | 1% |
| Ian S | 8/10 | 6144 days | 1% |
| MartinD | 8/10 | 6153 days | 1% |
| straw64 | 8/10 | 6154 days | 1% |
| Mark | 3/10 | 6167 days | 1% |
| Debbie Mossman | 8/10 | 6169 days | 1% |
| Miranda | 8/10 | 6171 days | 1% |
| Kern | 7/10 | 6179 days | 1% |
| Sandra | 8/10 | 6207 days | 1% |
| bobmcg | 9/10 | 6207 days | 1% |
| Bert | 8/10 | 6213 days | 1% |
| Robin | 8/10 | 6285 days | 1% |
| Annabelle | 10/10 | 6304 days | 1% |
| Heckter | 9/10 | 6466 days | 1% |
| Amy Clark | 10/10 | 6466 days | 1% |
| Claire | 8/10 | 6481 days | 1% |
| Roger and Heather Smith | 10/10 | 6500 days | 1% |
| Ondrej Kacena | 10/10 | 6506 days | 1% |
| Roger & Margaret | 9/10 | 6509 days | 1% |
| purplekat99 | 9/10 | 6551 days | 1% |
| AndiJorgensen | 5/10 | 6818 days | 1% |
| Rietveld | 8/10 | 6853 days | 1% |
| Pope | 9/10 | 6872 days | 1% |
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 Waitangi Treaty Grounds experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the Waitangi Treaty Grounds 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 Waitangi Treaty Grounds experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
1.70% 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
87%
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.