G'day, 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
90.34%
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 | 198 days | 100% |
| Valerie V | 10/10 | 472 days | 91% |
| Cam | 10/10 | 472 days | 91% |
| Penny Bullock | 10/10 | 2268 days | 4% |
| Nigel Jarvis | 10/10 | 2329 days | 4% |
| Janneke van Krieken | 8/10 | 2662 days | 3% |
| William Milligan-Manby | 10/10 | 2802 days | 3% |
| dan dalgleish | 10/10 | 2908 days | 3% |
| Melanie Farrell | 9/10 | 2917 days | 3% |
| Charlotte | 8/10 | 2944 days | 3% |
| Vicki Robey | 8/10 | 3008 days | 3% |
| Michal Za'heryuk | 9/10 | 3028 days | 3% |
| Veronika Za'heryuk | 9/10 | 3028 days | 3% |
| Thomas Nolwenn | 9/10 | 3033 days | 3% |
| Manibod Vannaphone | 10/10 | 3270 days | 2% |
| Luca Staudt | 7/10 | 3273 days | 2% |
| Nancy Logan | 8/10 | 3277 days | 2% |
| Friederike East | 9/10 | 3298 days | 2% |
| Sabine Bergen | 8/10 | 3315 days | 2% |
| Ken | 5/10 | 3629 days | 1% |
| Fanny DeBon | 7/10 | 3727 days | 1% |
| Ian Garner | 9/10 | 4017 days | 1% |
| Laurene | 5/10 | 4024 days | 1% |
| Guillaume | 6/10 | 4028 days | 1% |
| Sarah Horn | 9/10 | 4357 days | 0% |
| Sebastian Russell-Smits | 10/10 | 4357 days | 0% |
| Leo | 9/10 | 4463 days | 1% |
| Reinhard Stahl | 10/10 | 4464 days | 1% |
| Reinhard Stahl | 10/10 | 4464 days | 1% |
| Liz Marquart Scholtz | 8/10 | 4470 days | 1% |
| Kerstin | 9/10 | 4474 days | 1% |
| KDS_Holiday | 10/10 | 4520 days | 1% |
| Mark Westebring | 7/10 | 4721 days | 1% |
| ToGy | 1/10 | 4734 days | 0% |
| Barry Baily | 9/10 | 4747 days | 1% |
| Charlotte | 9/10 | 4749 days | 1% |
| John Reynolds | 10/10 | 4758 days | 1% |
| Ellen Jacobs | 5/10 | 4761 days | 1% |
| Peter, Noelle & Susanne | 6/10 | 4828 days | 1% |
| damaca | 7/10 | 4886 days | 1% |
| Oliver Berg | 7/10 | 5083 days | 1% |
| Boi Sagarra | 6/10 | 5083 days | 1% |
| Chris Ashton | 8/10 | 5094 days | 1% |
| Edgar & Marilyn Berry | 10/10 | 5096 days | 1% |
| John Taylor | 10/10 | 5099 days | 1% |
| Ann Parry | 9/10 | 5104 days | 1% |
| Peter | 9/10 | 5105 days | 1% |
| David | 9/10 | 5118 days | 1% |
| Rossiter | 7/10 | 5121 days | 1% |
| Rosey834 | 8/10 | 5190 days | 1% |
| Hans | 8/10 | 5455 days | 1% |
| Michael Egli | 9/10 | 5456 days | 1% |
| Aaron | 5/10 | 5475 days | 1% |
| Mieke Knoops | 7/10 | 5475 days | 1% |
| Tonny | 8/10 | 5492 days | 1% |
| snodge | 5/10 | 5493 days | 1% |
| uleugel | 8/10 | 5502 days | 1% |
| Len Daniell | 9/10 | 5507 days | 1% |
| kevinp | 7/10 | 5536 days | 1% |
| Anita de Boer | 8/10 | 5557 days | 1% |
| Karin Linder | 9/10 | 5559 days | 1% |
| richardh | 8/10 | 5680 days | 1% |
| Christine Dadd | 4/10 | 5787 days | 1% |
| MorganK | 8/10 | 5791 days | 1% |
| arthurwa | 10/10 | 5799 days | 1% |
| Robert | 5/10 | 5823 days | 1% |
| KeziaB | 9/10 | 5832 days | 1% |
| EleanorL | 7/10 | 5832 days | 1% |
| VickiS | 7/10 | 5832 days | 1% |
| Ian S | 8/10 | 5849 days | 1% |
| MartinD | 8/10 | 5857 days | 1% |
| straw64 | 8/10 | 5858 days | 1% |
| Mark | 3/10 | 5872 days | 1% |
| Debbie Mossman | 8/10 | 5874 days | 1% |
| Miranda | 8/10 | 5876 days | 1% |
| Kern | 7/10 | 5884 days | 1% |
| Sandra | 8/10 | 5912 days | 1% |
| bobmcg | 9/10 | 5912 days | 1% |
| Bert | 8/10 | 5917 days | 1% |
| Robin | 8/10 | 5990 days | 1% |
| Annabelle | 10/10 | 6009 days | 1% |
| Heckter | 9/10 | 6170 days | 1% |
| Amy Clark | 10/10 | 6170 days | 1% |
| Claire | 8/10 | 6185 days | 1% |
| Roger and Heather Smith | 10/10 | 6204 days | 1% |
| Ondrej Kacena | 10/10 | 6210 days | 1% |
| Roger & Margaret | 9/10 | 6213 days | 1% |
| purplekat99 | 9/10 | 6255 days | 1% |
| AndiJorgensen | 5/10 | 6522 days | 1% |
| Rietveld | 8/10 | 6557 days | 1% |
| Pope | 9/10 | 6576 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
-3.59% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 52 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 173 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 170 | -3.53% |
| 171 | -3.55% |
| 172 | -3.57% |
| 173 | -3.59% |
| 174 | -3.61% |
| 175 | -3.63% |
| 176 | -3.65% |
| … | … |
Balancing Adjustment
1.50% 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
88%
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.