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
90.48%
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 | 76 days | 100% |
| Valerie V | 10/10 | 350 days | 95% |
| Cam | 10/10 | 350 days | 95% |
| Penny Bullock | 10/10 | 2145 days | 4% |
| Nigel Jarvis | 10/10 | 2207 days | 4% |
| Janneke van Krieken | 8/10 | 2540 days | 4% |
| William Milligan-Manby | 10/10 | 2680 days | 3% |
| dan dalgleish | 10/10 | 2785 days | 3% |
| Melanie Farrell | 9/10 | 2795 days | 3% |
| Charlotte | 8/10 | 2822 days | 3% |
| Vicki Robey | 8/10 | 2886 days | 3% |
| Michal Za'heryuk | 9/10 | 2906 days | 3% |
| Veronika Za'heryuk | 9/10 | 2906 days | 3% |
| Thomas Nolwenn | 9/10 | 2911 days | 3% |
| Manibod Vannaphone | 10/10 | 3148 days | 2% |
| Luca Staudt | 7/10 | 3151 days | 2% |
| Nancy Logan | 8/10 | 3155 days | 2% |
| Friederike East | 9/10 | 3176 days | 2% |
| Sabine Bergen | 8/10 | 3193 days | 2% |
| Ken | 5/10 | 3507 days | 1% |
| Fanny DeBon | 7/10 | 3605 days | 1% |
| Ian Garner | 9/10 | 3895 days | 1% |
| Laurene | 5/10 | 3902 days | 1% |
| Guillaume | 6/10 | 3906 days | 1% |
| Sarah Horn | 9/10 | 4235 days | 0% |
| Sebastian Russell-Smits | 10/10 | 4235 days | 0% |
| Leo | 9/10 | 4341 days | 0% |
| Reinhard Stahl | 10/10 | 4342 days | 0% |
| Reinhard Stahl | 10/10 | 4342 days | 0% |
| Liz Marquart Scholtz | 8/10 | 4348 days | 0% |
| Kerstin | 9/10 | 4352 days | 0% |
| KDS_Holiday | 10/10 | 4398 days | 1% |
| Mark Westebring | 7/10 | 4599 days | 1% |
| ToGy | 1/10 | 4612 days | 0% |
| Barry Baily | 9/10 | 4625 days | 1% |
| Charlotte | 9/10 | 4627 days | 1% |
| John Reynolds | 10/10 | 4636 days | 1% |
| Ellen Jacobs | 5/10 | 4639 days | 1% |
| Peter, Noelle & Susanne | 6/10 | 4706 days | 1% |
| damaca | 7/10 | 4764 days | 1% |
| Oliver Berg | 7/10 | 4961 days | 1% |
| Boi Sagarra | 6/10 | 4961 days | 1% |
| Chris Ashton | 8/10 | 4972 days | 1% |
| Edgar & Marilyn Berry | 10/10 | 4974 days | 1% |
| John Taylor | 10/10 | 4977 days | 1% |
| Ann Parry | 9/10 | 4982 days | 1% |
| Peter | 9/10 | 4983 days | 1% |
| David | 9/10 | 4996 days | 1% |
| Rossiter | 7/10 | 4999 days | 1% |
| Rosey834 | 8/10 | 5068 days | 1% |
| Hans | 8/10 | 5333 days | 1% |
| Michael Egli | 9/10 | 5334 days | 1% |
| Aaron | 5/10 | 5353 days | 1% |
| Mieke Knoops | 7/10 | 5353 days | 1% |
| Tonny | 8/10 | 5370 days | 1% |
| snodge | 5/10 | 5371 days | 1% |
| uleugel | 8/10 | 5380 days | 1% |
| Len Daniell | 9/10 | 5385 days | 1% |
| kevinp | 7/10 | 5414 days | 1% |
| Anita de Boer | 8/10 | 5435 days | 1% |
| Karin Linder | 9/10 | 5437 days | 1% |
| richardh | 8/10 | 5558 days | 1% |
| Christine Dadd | 4/10 | 5665 days | 1% |
| MorganK | 8/10 | 5669 days | 1% |
| arthurwa | 10/10 | 5677 days | 1% |
| Robert | 5/10 | 5700 days | 1% |
| KeziaB | 9/10 | 5710 days | 1% |
| EleanorL | 7/10 | 5710 days | 1% |
| VickiS | 7/10 | 5710 days | 1% |
| Ian S | 8/10 | 5726 days | 1% |
| MartinD | 8/10 | 5735 days | 1% |
| straw64 | 8/10 | 5736 days | 1% |
| Mark | 3/10 | 5749 days | 1% |
| Debbie Mossman | 8/10 | 5752 days | 1% |
| Miranda | 8/10 | 5753 days | 1% |
| Kern | 7/10 | 5761 days | 1% |
| Sandra | 8/10 | 5789 days | 1% |
| bobmcg | 9/10 | 5790 days | 1% |
| Bert | 8/10 | 5795 days | 1% |
| Robin | 8/10 | 5867 days | 1% |
| Annabelle | 10/10 | 5886 days | 1% |
| Heckter | 9/10 | 6048 days | 1% |
| Amy Clark | 10/10 | 6048 days | 1% |
| Claire | 8/10 | 6063 days | 1% |
| Roger and Heather Smith | 10/10 | 6082 days | 1% |
| Ondrej Kacena | 10/10 | 6088 days | 1% |
| Roger & Margaret | 9/10 | 6091 days | 1% |
| purplekat99 | 9/10 | 6133 days | 1% |
| AndiJorgensen | 5/10 | 6400 days | 1% |
| Rietveld | 8/10 | 6435 days | 1% |
| Pope | 9/10 | 6454 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
-0.90% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 58 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 50 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 47 | -0.85% |
| 48 | -0.86% |
| 49 | -0.88% |
| 50 | -0.90% |
| 51 | -0.92% |
| 52 | -0.94% |
| 53 | -0.95% |
| … | … |
Balancing Adjustment
1.06% 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
91%
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.