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 White Island Tours.

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

White Island Tours

Valid Reviews

129 Valid Reviews

The White Island Tours experience has a total of 129 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 129 valid reviews:

Rating Count Percentage
10/10 48
37%
9/10 42
33%
8/10 19
15%
7/10 17
13%
6/10 0
0%
5/10 1
1%
4/10 1
1%
3/10 0
0%
2/10 0
0%
1/10 1
1%

88.29% Average

The raw data average (mean) for all the White Island Tours valid reviews is 88.29% and is based on 129 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

105 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 129 valid reviews, the experience has 105 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 105 face-to-face reviews:

Rating Count Percentage
10/10 34
32%
9/10 35
33%
8/10 18
17%
7/10 16
15%
6/10 0
0%
5/10 0
0%
4/10 1
1%
3/10 0
0%
2/10 0
0%
1/10 1
1%

87.24% Average

The raw data average (mean) for all the White Island Tours face-to-face reviews is 87.24% and is based on 105 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

91.02%

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
Matthew Mutimer 10/10 534 days 100%
Amanda Walden 10/10 1417 days 8%
Monique Pos 9/10 1507 days 8%
Alison Egan-Jones 9/10 1537 days 8%
Sylvain Schiber 9/10 1537 days 8%
Sylvain Chanton 10/10 1542 days 7%
Julian Gury 8/10 1550 days 7%
R. Damen 9/10 1568 days 7%
Michelle Smit 10/10 1629 days 7%
Gesa Roemer 8/10 1758 days 6%
Anais Roux 10/10 1763 days 7%
Luca Staudt 8/10 1782 days 6%
Florian Bisault 7/10 1783 days 6%
Anna Jungclaus 9/10 1790 days 7%
Signe Broedbaek 7/10 1792 days 6%
Petra Fragner 10/10 1798 days 7%
Koehler Ute 10/10 1811 days 7%
Niclas Ullno 8/10 1813 days 6%
Tamara 7/10 1814 days 6%
Chloe Guerillot 9/10 1824 days 6%
Luisa and Hannes 9/10 1837 days 6%
elena salimzhanova 10/10 1842 days 6%
Jakub Trojanek 8/10 1852 days 6%
Malina 10/10 1858 days 6%
Emma Keegan 7/10 2117 days 5%
Emilie Normand 7/10 2187 days 5%
Christopher Buch Madsen 8/10 2508 days 4%
Phil Bromby 9/10 2510 days 4%
Tobias Thull 7/10 2516 days 4%
Rita Hochstiasser 8/10 2538 days 4%
Nelle Dutilleur 10/10 2559 days 4%
Mathias Butterlin 8/10 2559 days 4%
Daryl 8/10 2567 days 4%
Bert Pubeg 9/10 2633 days 4%
Alex 8/10 2937 days 2%
Lucie 9/10 2973 days 2%
Henzen 9/10 2977 days 2%
Roy Barton 9/10 3240 days 1%
Brian Livesey 9/10 3248 days 1%
Merlyn 8/10 3256 days 1%
Beyeler 10/10 3260 days 1%
Ralf Glaser 7/10 3260 days 1%
Suzanne van Kol 8/10 3265 days 1%
kiwifrenchy 10/10 3272 days 1%
_mel_ 9/10 3303 days 1%
C 10/10 3303 days 1%
Sarah and Soren 10/10 3340 days 1%
Erik Folkersen 10/10 3348 days 1%
Rudlinger 10/10 3351 days 1%
GenH 10/10 3578 days 0%
R Tearle 10/10 3587 days 0%
Franzi & Tobi 10/10 3589 days 0%
Nathalie 10/10 3593 days 0%
Ven 9/10 3595 days 0%
Jerven and Kim 10/10 3602 days 0%
Sarah Luijckx 1/10 3604 days 0%
Alan Jeffery 7/10 3605 days 0%
Birgette Weiner 9/10 3623 days 0%
Tim Van Nispen 9/10 3625 days 0%
Bottcher 10/10 3625 days 0%
Sue & Graham Mullin 10/10 3632 days 0%
John Simpson 9/10 3634 days 0%
Karen Phillips 9/10 3634 days 0%
Michelle Booty 8/10 3636 days 0%
Nadia Husain 7/10 3637 days 0%
Dietmar Gans 10/10 3943 days 2%
Matt Roper 10/10 3965 days 2%
Chris Glasg 10/10 3982 days 2%
Jamie Hallifax 9/10 3993 days 2%
Paul Ritchie 10/10 3997 days 2%
Gerry Donoghue 10/10 4016 days 2%
Yvonne German 9/10 4019 days 2%
DebbieM 5/10 4033 days 1%
mj111 10/10 4033 days 2%
Susann Koschmeider 10/10 4068 days 2%
X Otte 10/10 4072 days 2%
Hans Hoff 10/10 4072 days 2%
Solveig Mosinski 10/10 4076 days 2%
Val and Barnie Weir 10/10 4087 days 2%
Wim Put 9/10 4090 days 2%
discerner 10/10 4094 days 2%
Phillip Reade 10/10 4094 days 2%
Tim Beuzeval 9/10 4094 days 2%
barp 9/10 4125 days 2%
Becky Fairweather 10/10 4278 days 2%
David 10/10 4308 days 2%
martinat 10/10 4308 days 2%
Mike 9/10 4317 days 2%
MichaelS1 9/10 4324 days 2%
StefanieGermany 9/10 4325 days 2%
Veronika 9/10 4327 days 2%
Ralph Boese 7/10 4328 days 2%
ToyalFrance 9/10 4328 days 2%
ReneeA 9/10 4356 days 2%
Lorna 8/10 4357 days 2%
Bruce 10/10 4358 days 2%
Sandra 10/10 4365 days 2%
Heidi 7/10 4372 days 2%
Philipp 9/10 4372 days 2%
Simon 9/10 4374 days 2%
Kathryn 8/10 4375 days 2%
Barbara 9/10 4380 days 2%
Joachim 10/10 4380 days 2%
Ans 7/10 4381 days 2%
Minder 10/10 4382 days 2%
Evi 7/10 4413 days 2%
Ann Maree 9/10 4416 days 2%
Trine 9/10 4426 days 2%
Carina Korn 10/10 4524 days 2%
Christian 7/10 4524 days 2%
Nick 10/10 4526 days 2%
Terri Scott 7/10 4544 days 2%
Alan Bellerby 10/10 4694 days 2%
Robert 4/10 4700 days 1%
Elise 10/10 4700 days 2%
Fung 8/10 4700 days 2%
Peter Aston 9/10 4700 days 2%
Tony Wicks 8/10 4705 days 2%
Sue 8/10 4712 days 2%
Carla 9/10 4720 days 2%
Melissa Steedman 9/10 4747 days 2%
Vanessa Brennan 7/10 4747 days 2%
Tim 9/10 4748 days 2%
Mary 10/10 4798 days 2%
Agnes 9/10 5014 days 2%
Cohen 9/10 5034 days 2%
John 8/10 5038 days 2%
SueLinsk 9/10 5038 days 2%
Frauke 7/10 5080 days 2%

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 White Island Tours experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.08% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 46 days. However the White Island Tours 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 White Island Tours experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.02%
198 -4.04%
199 -4.06%
200 -4.08%
201 -4.10%
202 -4.12%
203 -4.15%

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.