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
87.15%
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 | 22 days | 87.93 | 88% | |
| Pretorius Family | 10/10 | 52 days | 99.57 | 100% | |
| Bruce Phillips | 10/10 | 325 days | 83.26 | 83% | |
| Philipp Kulik | 10/10 | 325 days | 83.26 | 83% | |
| Lena | 9/10 | 631 days |  |
46.94 | 47% |
| Nate Smith | 10/10 | 690 days | 30.99 | 30% | |
| John Jones | 10/10 | 874 days | 12.74 | 12% | |
| Natasha Walker | 10/10 | 995 days | 6.58 | 6% | |
| Richard Thompson | 10/10 | 1026 days | 5.75 | 5% | |
| Tom Nicol | 10/10 | 1118 days | 4.97 | 4% | |
| Ian Watson | 10/10 | 1330 days | 4.68 | 4% | |
| Dorota Kimber | 10/10 | 1360 days | 4.64 | 4% | |
| Luke Roberts | 10/10 | 1544 days | 4.38 | 3% | |
| Glyn and Karen Farlow | 10/10 | 1621 days | |
5.14 | 4% |
| Maria den Otter | 10/10 | 1664 days | 4.22 | 3% | |
| Beverley Ceci | 10/10 | 1664 days | 4.22 | 3% | |
| Henry Papuni | 10/10 | 1664 days | 4.22 | 3% | |
| B D | 10/10 | 1664 days | 4.22 | 3% | |
| Tracey Harrison | 10/10 | 1695 days | 4.18 | 3% | |
| Zoe Heij | 10/10 | 1909 days | 3.88 | 3% | |
| Franzyy | 10/10 | 1939 days | 3.84 | 3% | |
| Margo Boyd | 10/10 | 1998 days | 3.76 | 3% | |
| Dan | 10/10 | 1998 days | 3.76 | 3% | |
| chrswdance | 10/10 | 2060 days | 3.68 | 3% | |
| melemele | 10/10 | 2304 days | 3.34 | 2% | |
| joeweiss | 10/10 | 2364 days | 3.26 | 2% | |
| kiwifrenchy | 9/10 | 2364 days | 3.26 | 2% | |
| MartinaCH | 10/10 | 2395 days | 3.22 | 2% | |
| Marieke | 10/10 | 2426 days | 3.18 | 2% | |
| dr_bc_gunther | 10/10 | 2548 days | 3.01 | 2% | |
| Desma Frampton | 10/10 | 2683 days | |
3.39 | 2% |
| Irene and Werner Keil | 10/10 | 2690 days | |
3.38 | 2% |
| Farmer_sutra | 10/10 | 2701 days | 2.8 | 2% | |
| Marleen Meyers | 8/10 | 2712 days | |
3.34 | 2% |
| Dieter Uhlmann | 8/10 | 2712 days | |
3.34 | 2% |
| cate | 10/10 | 2729 days | 2.76 | 2% | |
| miscellanea4 | 10/10 | 2760 days | 2.72 | 2% | |
| William_Symington | 10/10 | 2821 days | 2.64 | 2% | |
| GaryHulst | 10/10 | 2882 days | 2.55 | 2% | |
| jbchandler | 10/10 | 3005 days | 2.38 | 1% | |
| Birgit Farwig | 10/10 | 3047 days | |
2.79 | 2% |
| sirous21 | 10/10 | 3094 days | 2.26 | 1% | |
| Keith Margan | 10/10 | 3094 days | 2.26 | 1% | |
| Kevin and Teresa | 10/10 | 3094 days | |
2.71 | 2% |
| middendorp | 9/10 | 3140 days | |
2.64 | 2% |
| PatH | 9/10 | 3200 days | |
2.54 | 2% |
| Eva Maria | 10/10 | 3247 days | 2.05 | 1% | |
| regw | 10/10 | 3276 days | |
2.41 | 1% |
| Andrea | 9/10 | 3320 days | |
2.34 | 1% |
| Lilly Tillman | 10/10 | 3417 days | 1.82 | 1% | |
| Gray | 9/10 | 3636 days | |
1.82 | 1% |
| ashmann | 10/10 | 3729 days | 1.39 | 0% | |
| George Jeffs | 10/10 | 3779 days | |
1.59 | 1% |
| Ian and Judy | 9/10 | 3801 days | |
1.55 | 1% |
| Susannah May | 10/10 | 3803 days | 1.29 | 0% | |
| Victoria Manning | 10/10 | 3803 days | 1.29 | 0% | |
| Wendy Lomas | 8/10 | 3809 days | |
1.54 | 1% |
| Kathleen L | 10/10 | 3809 days | |
1.54 | 1% |
| Paul Cripps | 10/10 | 3809 days | |
1.54 | 1% |
| Petra | 10/10 | 4137 days | |
1.0 | 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
-0.12% 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 6 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 3 | -0.06% |
| 4 | -0.08% |
| 5 | -0.10% |
| 6 | -0.12% |
| 7 | -0.14% |
| 8 | -0.16% |
| 9 | -0.18% |
| … | … |
Final Ranking Score
87%
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.