Ranking Score Explained
Hi there, 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 Mountain Helicopters.
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.
Nick Morrison
Rankers owner
Mountain Helicopters
Valid Reviews
60 Valid Reviews
The Mountain Helicopters experience has a total of 63 reviews. There are 60 valid reviews that are included when calculating the ranking score and 3 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 60 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 49 |
|
82% |
| 9/10 | 7 |
|
12% |
| 8/10 | 3 |
|
5% |
| 7/10 | 0 |
|
0% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
2% |
| 1/10 | 0 |
|
0% |
96.50% Average
The raw data average (mean) for all the Mountain Helicopters valid reviews is 96.50% and is based on 60 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
19 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 60 valid reviews, the experience has 19 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 19 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 10 |
|
53% |
| 9/10 | 6 |
|
32% |
| 8/10 | 3 |
|
16% |
| 7/10 | 0 |
|
0% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
93.68% Average
The raw data average (mean) for all the Mountain Helicopters face-to-face reviews is 93.68% and is based on 19 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
84.93%
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 | Face-to-Face | Weight | Relative Weight |
|---|---|---|---|---|---|
| Tina Laughton | 2/10 | 235 days | 80.3 | 90% | |
| Pretorius Family | 10/10 | 265 days | 88.87 | 100% | |
| Bruce Phillips | 10/10 | 538 days | 54.13 | 61% | |
| Philipp Kulik | 10/10 | 538 days | 54.13 | 61% | |
| Lena | 9/10 | 844 days |  |
17.98 | 20% |
| Nate Smith | 10/10 | 903 days | 10.84 | 12% | |
| John Jones | 10/10 | 1087 days | 5.01 | 5% | |
| Natasha Walker | 10/10 | 1208 days | 4.85 | 5% | |
| Richard Thompson | 10/10 | 1239 days | 4.8 | 5% | |
| Tom Nicol | 10/10 | 1331 days | 4.68 | 5% | |
| Ian Watson | 10/10 | 1543 days | 4.39 | 4% | |
| Dorota Kimber | 10/10 | 1573 days | 4.35 | 4% | |
| Luke Roberts | 10/10 | 1757 days | 4.09 | 4% | |
| Glyn and Karen Farlow | 10/10 | 1834 days | |
4.79 | 5% |
| Maria den Otter | 10/10 | 1877 days | 3.93 | 4% | |
| Beverley Ceci | 10/10 | 1877 days | 3.93 | 4% | |
| Henry Papuni | 10/10 | 1877 days | 3.93 | 4% | |
| B D | 10/10 | 1877 days | 3.93 | 4% | |
| Tracey Harrison | 10/10 | 1908 days | 3.89 | 4% | |
| Zoe Heij | 10/10 | 2122 days | 3.59 | 3% | |
| Franzyy | 10/10 | 2152 days | 3.55 | 3% | |
| Margo Boyd | 10/10 | 2211 days | 3.47 | 3% | |
| Dan | 10/10 | 2211 days | 3.47 | 3% | |
| chrswdance | 10/10 | 2273 days | 3.39 | 3% | |
| melemele | 10/10 | 2517 days | 3.05 | 3% | |
| joeweiss | 10/10 | 2577 days | 2.97 | 3% | |
| kiwifrenchy | 9/10 | 2577 days | 2.97 | 3% | |
| MartinaCH | 10/10 | 2608 days | 2.93 | 3% | |
| Marieke | 10/10 | 2639 days | 2.88 | 3% | |
| dr_bc_gunther | 10/10 | 2761 days | 2.72 | 2% | |
| Desma Frampton | 10/10 | 2896 days | |
3.04 | 3% |
| Irene and Werner Keil | 10/10 | 2903 days | |
3.03 | 3% |
| Farmer_sutra | 10/10 | 2914 days | 2.51 | 2% | |
| Marleen Meyers | 8/10 | 2925 days | |
2.99 | 3% |
| Dieter Uhlmann | 8/10 | 2925 days | |
2.99 | 3% |
| cate | 10/10 | 2942 days | 2.47 | 2% | |
| miscellanea4 | 10/10 | 2973 days | 2.43 | 2% | |
| William_Symington | 10/10 | 3034 days | 2.34 | 2% | |
| GaryHulst | 10/10 | 3095 days | 2.26 | 2% | |
| jbchandler | 10/10 | 3218 days | 2.09 | 2% | |
| Birgit Farwig | 10/10 | 3260 days | |
2.44 | 2% |
| sirous21 | 10/10 | 3307 days | 1.97 | 1% | |
| Keith Margan | 10/10 | 3307 days | 1.97 | 1% | |
| Kevin and Teresa | 10/10 | 3307 days | |
2.36 | 2% |
| middendorp | 9/10 | 3353 days | |
2.29 | 2% |
| PatH | 9/10 | 3413 days | |
2.19 | 2% |
| Eva Maria | 10/10 | 3460 days | 1.76 | 1% | |
| regw | 10/10 | 3489 days | |
2.06 | 2% |
| Andrea | 9/10 | 3533 days | |
1.99 | 2% |
| Lilly Tillman | 10/10 | 3630 days | 1.53 | 1% | |
| Gray | 9/10 | 3849 days | |
1.47 | 1% |
| ashmann | 10/10 | 3942 days | 1.1 | 1% | |
| George Jeffs | 10/10 | 3992 days | |
1.24 | 1% |
| Ian and Judy | 9/10 | 4014 days | |
1.2 | 1% |
| Susannah May | 10/10 | 4016 days | 1.0 | 0% | |
| Victoria Manning | 10/10 | 4016 days | 1.0 | 0% | |
| Wendy Lomas | 8/10 | 4022 days | |
1.19 | 1% |
| Kathleen L | 10/10 | 4022 days | |
1.19 | 1% |
| Paul Cripps | 10/10 | 4022 days | |
1.19 | 1% |
| Petra | 10/10 | 4350 days | |
0.65 | 0% |
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 Mountain Helicopters experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.38% Adjustment
There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Mountain Helicopters 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 364 days.
The Mountain Helicopters experience has been adjusted for 219 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 216 | -4.32% |
| 217 | -4.34% |
| 218 | -4.36% |
| 219 | -4.38% |
| 220 | -4.40% |
| 221 | -4.42% |
| 222 | -4.44% |
| … | … |
Final Ranking Score
81%
The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.