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
89.14%
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 | 589 days | 100% |
| Valerie V | 10/10 | 864 days | 73% |
| Cam | 10/10 | 864 days | 73% |
| Penny Bullock | 10/10 | 2659 days | 4% |
| Nigel Jarvis | 10/10 | 2721 days | 4% |
| Janneke van Krieken | 8/10 | 3054 days | 3% |
| William Milligan-Manby | 10/10 | 3193 days | 2% |
| dan dalgleish | 10/10 | 3299 days | 2% |
| Melanie Farrell | 9/10 | 3309 days | 2% |
| Charlotte | 8/10 | 3336 days | 2% |
| Vicki Robey | 8/10 | 3400 days | 2% |
| Michal Za'heryuk | 9/10 | 3420 days | 2% |
| Veronika Za'heryuk | 9/10 | 3420 days | 2% |
| Thomas Nolwenn | 9/10 | 3425 days | 2% |
| Manibod Vannaphone | 10/10 | 3662 days | 1% |
| Luca Staudt | 7/10 | 3665 days | 1% |
| Nancy Logan | 8/10 | 3669 days | 1% |
| Friederike East | 9/10 | 3690 days | 1% |
| Sabine Bergen | 8/10 | 3707 days | 1% |
| Ken | 5/10 | 4021 days | 0% |
| Fanny DeBon | 7/10 | 4119 days | 0% |
| Ian Garner | 9/10 | 4409 days | 1% |
| Laurene | 5/10 | 4416 days | 0% |
| Guillaume | 6/10 | 4420 days | 1% |
| Sarah Horn | 9/10 | 4749 days | 1% |
| Sebastian Russell-Smits | 10/10 | 4749 days | 1% |
| Leo | 9/10 | 4855 days | 1% |
| Reinhard Stahl | 10/10 | 4856 days | 1% |
| Reinhard Stahl | 10/10 | 4856 days | 1% |
| Liz Marquart Scholtz | 8/10 | 4862 days | 1% |
| Kerstin | 9/10 | 4866 days | 1% |
| KDS_Holiday | 10/10 | 4912 days | 1% |
| Mark Westebring | 7/10 | 5113 days | 1% |
| ToGy | 1/10 | 5126 days | 0% |
| Barry Baily | 9/10 | 5139 days | 1% |
| Charlotte | 9/10 | 5141 days | 1% |
| John Reynolds | 10/10 | 5150 days | 1% |
| Ellen Jacobs | 5/10 | 5153 days | 0% |
| Peter, Noelle & Susanne | 6/10 | 5220 days | 1% |
| damaca | 7/10 | 5278 days | 1% |
| Oliver Berg | 7/10 | 5475 days | 1% |
| Boi Sagarra | 6/10 | 5475 days | 1% |
| Chris Ashton | 8/10 | 5486 days | 1% |
| Edgar & Marilyn Berry | 10/10 | 5488 days | 1% |
| John Taylor | 10/10 | 5491 days | 1% |
| Ann Parry | 9/10 | 5496 days | 1% |
| Peter | 9/10 | 5497 days | 1% |
| David | 9/10 | 5510 days | 1% |
| Rossiter | 7/10 | 5513 days | 1% |
| Rosey834 | 8/10 | 5582 days | 1% |
| Hans | 8/10 | 5847 days | 1% |
| Michael Egli | 9/10 | 5848 days | 1% |
| Aaron | 5/10 | 5867 days | 0% |
| Mieke Knoops | 7/10 | 5867 days | 1% |
| Tonny | 8/10 | 5884 days | 1% |
| snodge | 5/10 | 5885 days | 0% |
| uleugel | 8/10 | 5894 days | 1% |
| Len Daniell | 9/10 | 5899 days | 1% |
| kevinp | 7/10 | 5928 days | 1% |
| Anita de Boer | 8/10 | 5949 days | 1% |
| Karin Linder | 9/10 | 5951 days | 1% |
| richardh | 8/10 | 6071 days | 1% |
| Christine Dadd | 4/10 | 6178 days | 0% |
| MorganK | 8/10 | 6182 days | 1% |
| arthurwa | 10/10 | 6191 days | 1% |
| Robert | 5/10 | 6214 days | 0% |
| KeziaB | 9/10 | 6224 days | 1% |
| EleanorL | 7/10 | 6224 days | 1% |
| VickiS | 7/10 | 6224 days | 1% |
| Ian S | 8/10 | 6240 days | 1% |
| MartinD | 8/10 | 6249 days | 1% |
| straw64 | 8/10 | 6250 days | 1% |
| Mark | 3/10 | 6263 days | 0% |
| Debbie Mossman | 8/10 | 6265 days | 1% |
| Miranda | 8/10 | 6267 days | 1% |
| Kern | 7/10 | 6275 days | 1% |
| Sandra | 8/10 | 6303 days | 1% |
| bobmcg | 9/10 | 6303 days | 1% |
| Bert | 8/10 | 6309 days | 1% |
| Robin | 8/10 | 6381 days | 1% |
| Annabelle | 10/10 | 6400 days | 1% |
| Heckter | 9/10 | 6562 days | 1% |
| Amy Clark | 10/10 | 6562 days | 1% |
| Claire | 8/10 | 6577 days | 1% |
| Roger and Heather Smith | 10/10 | 6596 days | 1% |
| Ondrej Kacena | 10/10 | 6602 days | 1% |
| Roger & Margaret | 9/10 | 6605 days | 1% |
| purplekat99 | 9/10 | 6647 days | 1% |
| AndiJorgensen | 5/10 | 6913 days | 0% |
| Rietveld | 8/10 | 6949 days | 1% |
| Pope | 9/10 | 6968 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
-4.00% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 57 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 | -3.94% |
| 198 | -3.96% |
| 199 | -3.98% |
| 200 | -4.00% |
| 201 | -4.02% |
| 202 | -4.04% |
| 203 | -4.06% |
| … | … |
Balancing Adjustment
1.80% 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.