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 Glacier Country 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.
Glacier Country Helicopters
Valid Reviews
52 Valid Reviews
The Glacier Country Helicopters experience has a total of 53 reviews. There are 52 valid reviews that are included when calculating the ranking score and 1 invalid review 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 52 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 31 |
|
60% |
| 9/10 | 9 |
|
17% |
| 8/10 | 8 |
|
15% |
| 7/10 | 3 |
|
6% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 1 |
|
2% |
91.73% Average
The raw data average (mean) for all the Glacier Country Helicopters valid reviews is 91.73% and is based on 52 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
43 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 52 valid reviews, the experience has 43 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 43 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 26 |
|
60% |
| 9/10 | 8 |
|
19% |
| 8/10 | 6 |
|
14% |
| 7/10 | 3 |
|
7% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
93.26% Average
The raw data average (mean) for all the Glacier Country Helicopters face-to-face reviews is 93.26% and is based on 43 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
79.22%
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 |
|---|---|---|---|
| Ragnar | 1/10 | 70 days | 41% |
| Noelia | 10/10 | 160 days | 100% |
| Rick Stockdale | 10/10 | 3400 days | 1% |
| Manu Liberta | 10/10 | 3476 days | 1% |
| Faye Kokolakis | 10/10 | 3477 days | 1% |
| Peter Hodgson | 10/10 | 3787 days | 0% |
| Julian Roots | 9/10 | 4849 days | 0% |
| Kali Lohman | 8/10 | 4955 days | 0% |
| Rick Moth | 10/10 | 5223 days | 0% |
| Elaine | 10/10 | 5224 days | 0% |
| Mike & Jennie | 9/10 | 5225 days | 0% |
| Sabine | 10/10 | 5226 days | 0% |
| katel86 | 8/10 | 5396 days | 0% |
| Debbie Smithers | 10/10 | 5538 days | 0% |
| Laurent P | 10/10 | 5552 days | 0% |
| Ray Banham | 9/10 | 5560 days | 0% |
| Ian & Phyllis | 10/10 | 5572 days | 0% |
| Geert Van Tittelboom | 10/10 | 5584 days | 0% |
| Irene and Thib Schneider | 10/10 | 5596 days | 0% |
| antrobdozer | 10/10 | 5792 days | 0% |
| Chris el capitan | 7/10 | 5950 days | 0% |
| Amanda Iavarone | 10/10 | 5951 days | 0% |
| Janny Meerdinnk Veldboow | 10/10 | 5951 days | 0% |
| Yvonne Ing | 10/10 | 5972 days | 0% |
| Chance McGuire | 10/10 | 5973 days | 0% |
| E.M. Prideaux | 10/10 | 5987 days | 0% |
| Bartlett nz | 10/10 | 5990 days | 0% |
| joannaw | 10/10 | 6020 days | 0% |
| TomL | 10/10 | 6065 days | 0% |
| marleen451 | 8/10 | 6096 days | 0% |
| rogerandchristine | 10/10 | 6164 days | 0% |
| joevw | 10/10 | 6234 days | 0% |
| ElizabethF | 9/10 | 6246 days | 0% |
| Philipp | 8/10 | 6279 days | 0% |
| JasminA | 8/10 | 6279 days | 0% |
| brendar | 10/10 | 6279 days | 0% |
| AstridVG | 7/10 | 6296 days | 0% |
| Vivien Williams | 10/10 | 6297 days | 0% |
| JohannaB | 8/10 | 6298 days | 0% |
| Joery | 9/10 | 6302 days | 0% |
| Debbie | 9/10 | 6302 days | 0% |
| Kevin | 10/10 | 6310 days | 0% |
| ChenM | 9/10 | 6313 days | 0% |
| CollyBob | 10/10 | 6551 days | 0% |
| Rachel | 9/10 | 6645 days | 0% |
| Alison Street | 9/10 | 6678 days | 0% |
| Wanda | 10/10 | 6680 days | 0% |
| Blenkoe | 8/10 | 6684 days | 0% |
| ranker_36 | 8/10 | 6881 days | 0% |
| Peter | 7/10 | 7049 days | 0% |
| Peter | 10/10 | 7061 days | 0% |
| Brian | 10/10 | 7061 days | 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 Glacier Country Helicopters experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-0.63% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 112 days. However the Glacier Country 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Glacier Country Helicopters experience has been adjusted for 55 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 52 | -0.60% |
| 53 | -0.61% |
| 54 | -0.62% |
| 55 | -0.63% |
| 56 | -0.64% |
| 57 | -0.65% |
| 58 | -0.67% |
| … | … |
Balancing Adjustment
3.41% 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
82%
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.