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 The Helicopter Line West Coast Glaciers.

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's avatar

Nick Morrison

Rankers owner

The Helicopter Line West Coast Glaciers

Valid Reviews

35 Valid Reviews

The The Helicopter Line West Coast Glaciers experience has a total of 35 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 35 valid reviews:

Rating Count Percentage
10/10 14
40%
9/10 10
29%
8/10 6
17%
7/10 5
14%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

89.43% Average

The raw data average (mean) for all the The Helicopter Line West Coast Glaciers valid reviews is 89.43% and is based on 35 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

31 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 35 valid reviews, the experience has 31 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 31 face-to-face reviews:

Rating Count Percentage
10/10 11
35%
9/10 9
29%
8/10 6
19%
7/10 5
16%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

88.39% Average

The raw data average (mean) for all the The Helicopter Line West Coast Glaciers face-to-face reviews is 88.39% and is based on 31 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

98.15%

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 Relative Weight
Angela Hall 10/10 158 days 100%
NewZealander 10/10 552 days 54%
Vicki Hoskinson 10/10 888 days 12%
Patricia Trigo 10/10 1741 days 4%
Sarah Jane O'Reilly 9/10 2711 days 2%
Matusala Habtemariam 8/10 2739 days 2%
Anne and Steve Bartlett 10/10 2766 days 2%
Cornelia Stark 10/10 2771 days 2%
D Pieter 8/10 3168 days 1%
Meryem Buchwitz 7/10 3183 days 1%
Margreet Hanemaaijer 9/10 3431 days 0%
Vlutters 10/10 3450 days 0%
B Sluis 9/10 3454 days 0%
Howell Davies 10/10 3454 days 0%
Dean 10/10 3520 days 0%
Andy Johnson 10/10 3802 days 1%
Lars Taarnhoej 7/10 4162 days 1%
gereldineb 9/10 4260 days 1%
Francesca 8/10 4311 days 1%
MiepS 9/10 4498 days 1%
HovingL 7/10 4522 days 1%
NatasjaV 9/10 4528 days 1%
JimmyK 7/10 4528 days 1%
Stefanie 9/10 4535 days 1%
Tatjane 10/10 4557 days 1%
Maureen 10/10 4630 days 1%
Rob and Dorothy 8/10 4880 days 1%
Jennifer Baulch 8/10 4886 days 1%
Kavanagh 8/10 4893 days 1%
Neil 7/10 4901 days 1%
Sara Rütten 9/10 4908 days 1%
Knol 10/10 4911 days 1%
Rebekah Holbrook 9/10 4938 days 1%
Simon Chettleburgh 9/10 4938 days 1%
Rene Schotvanger 10/10 5112 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 The Helicopter Line West Coast Glaciers experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-1.53% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 121 days. However the The Helicopter Line West Coast Glaciers 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 The Helicopter Line West Coast Glaciers experience has been adjusted for 141 days. Adjustments are according to the following table.

Days Adjustment
138 -1.49%
139 -1.50%
140 -1.51%
141 -1.53%
142 -1.54%
143 -1.55%
144 -1.56%

Final Ranking Score

97%

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.