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 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
90.39%
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 | 165 days | 100% |
| Valerie V | 10/10 | 439 days | 92% |
| Cam | 10/10 | 439 days | 92% |
| Penny Bullock | 10/10 | 2235 days | 4% |
| Nigel Jarvis | 10/10 | 2296 days | 4% |
| Janneke van Krieken | 8/10 | 2629 days | 3% |
| William Milligan-Manby | 10/10 | 2769 days | 3% |
| dan dalgleish | 10/10 | 2875 days | 3% |
| Melanie Farrell | 9/10 | 2884 days | 3% |
| Charlotte | 8/10 | 2911 days | 3% |
| Vicki Robey | 8/10 | 2975 days | 3% |
| Michal Za'heryuk | 9/10 | 2995 days | 3% |
| Veronika Za'heryuk | 9/10 | 2995 days | 3% |
| Thomas Nolwenn | 9/10 | 3000 days | 3% |
| Manibod Vannaphone | 10/10 | 3237 days | 2% |
| Luca Staudt | 7/10 | 3240 days | 2% |
| Nancy Logan | 8/10 | 3244 days | 2% |
| Friederike East | 9/10 | 3265 days | 2% |
| Sabine Bergen | 8/10 | 3282 days | 2% |
| Ken | 5/10 | 3596 days | 1% |
| Fanny DeBon | 7/10 | 3694 days | 1% |
| Ian Garner | 9/10 | 3984 days | 1% |
| Laurene | 5/10 | 3991 days | 0% |
| Guillaume | 6/10 | 3995 days | 1% |
| Sarah Horn | 9/10 | 4324 days | 0% |
| Sebastian Russell-Smits | 10/10 | 4324 days | 0% |
| Leo | 9/10 | 4430 days | 1% |
| Reinhard Stahl | 10/10 | 4431 days | 1% |
| Reinhard Stahl | 10/10 | 4431 days | 1% |
| Liz Marquart Scholtz | 8/10 | 4437 days | 1% |
| Kerstin | 9/10 | 4441 days | 1% |
| KDS_Holiday | 10/10 | 4487 days | 1% |
| Mark Westebring | 7/10 | 4688 days | 1% |
| ToGy | 1/10 | 4701 days | 0% |
| Barry Baily | 9/10 | 4714 days | 1% |
| Charlotte | 9/10 | 4716 days | 1% |
| John Reynolds | 10/10 | 4725 days | 1% |
| Ellen Jacobs | 5/10 | 4728 days | 1% |
| Peter, Noelle & Susanne | 6/10 | 4795 days | 1% |
| damaca | 7/10 | 4853 days | 1% |
| Oliver Berg | 7/10 | 5050 days | 1% |
| Boi Sagarra | 6/10 | 5050 days | 1% |
| Chris Ashton | 8/10 | 5061 days | 1% |
| Edgar & Marilyn Berry | 10/10 | 5063 days | 1% |
| John Taylor | 10/10 | 5066 days | 1% |
| Ann Parry | 9/10 | 5071 days | 1% |
| Peter | 9/10 | 5072 days | 1% |
| David | 9/10 | 5085 days | 1% |
| Rossiter | 7/10 | 5088 days | 1% |
| Rosey834 | 8/10 | 5157 days | 1% |
| Hans | 8/10 | 5422 days | 1% |
| Michael Egli | 9/10 | 5423 days | 1% |
| Aaron | 5/10 | 5442 days | 1% |
| Mieke Knoops | 7/10 | 5442 days | 1% |
| Tonny | 8/10 | 5459 days | 1% |
| snodge | 5/10 | 5460 days | 1% |
| uleugel | 8/10 | 5469 days | 1% |
| Len Daniell | 9/10 | 5474 days | 1% |
| kevinp | 7/10 | 5503 days | 1% |
| Anita de Boer | 8/10 | 5524 days | 1% |
| Karin Linder | 9/10 | 5526 days | 1% |
| richardh | 8/10 | 5647 days | 1% |
| Christine Dadd | 4/10 | 5754 days | 1% |
| MorganK | 8/10 | 5758 days | 1% |
| arthurwa | 10/10 | 5766 days | 1% |
| Robert | 5/10 | 5790 days | 1% |
| KeziaB | 9/10 | 5799 days | 1% |
| EleanorL | 7/10 | 5799 days | 1% |
| VickiS | 7/10 | 5799 days | 1% |
| Ian S | 8/10 | 5815 days | 1% |
| MartinD | 8/10 | 5824 days | 1% |
| straw64 | 8/10 | 5825 days | 1% |
| Mark | 3/10 | 5838 days | 0% |
| Debbie Mossman | 8/10 | 5841 days | 1% |
| Miranda | 8/10 | 5843 days | 1% |
| Kern | 7/10 | 5851 days | 1% |
| Sandra | 8/10 | 5879 days | 1% |
| bobmcg | 9/10 | 5879 days | 1% |
| Bert | 8/10 | 5884 days | 1% |
| Robin | 8/10 | 5956 days | 1% |
| Annabelle | 10/10 | 5975 days | 1% |
| Heckter | 9/10 | 6137 days | 1% |
| Amy Clark | 10/10 | 6137 days | 1% |
| Claire | 8/10 | 6152 days | 1% |
| Roger and Heather Smith | 10/10 | 6171 days | 1% |
| Ondrej Kacena | 10/10 | 6177 days | 1% |
| Roger & Margaret | 9/10 | 6180 days | 1% |
| purplekat99 | 9/10 | 6222 days | 1% |
| AndiJorgensen | 5/10 | 6489 days | 1% |
| Rietveld | 8/10 | 6524 days | 1% |
| Pope | 9/10 | 6543 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
-2.83% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 45 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 139 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 136 | -2.77% |
| 137 | -2.79% |
| 138 | -2.81% |
| 139 | -2.83% |
| 140 | -2.85% |
| 141 | -2.87% |
| 142 | -2.89% |
| … | … |
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 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
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.