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

90.96%

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 10/10 545 days 100%
Amanda Walden 10/10 1428 days 8%
Monique Pos 9/10 1518 days 8%
Alison Egan-Jones 9/10 1548 days 8%
Sylvain Schiber 9/10 1548 days 8%
Sylvain Chanton 10/10 1553 days 8%
Julian Gury 8/10 1561 days 7%
R. Damen 9/10 1579 days 8%
Michelle Smit 10/10 1640 days 7%
Gesa Roemer 8/10 1769 days 7%
Anais Roux 10/10 1774 days 7%
Luca Staudt 8/10 1793 days 7%
Florian Bisault 7/10 1794 days 6%
Anna Jungclaus 9/10 1801 days 7%
Signe Broedbaek 7/10 1803 days 6%
Petra Fragner 10/10 1809 days 7%
Koehler Ute 10/10 1822 days 7%
Niclas Ullno 8/10 1824 days 6%
Tamara 7/10 1825 days 6%
Chloe Guerillot 9/10 1835 days 7%
Luisa and Hannes 9/10 1848 days 7%
elena salimzhanova 10/10 1853 days 7%
Jakub Trojanek 8/10 1863 days 6%
Malina 10/10 1869 days 7%
Emma Keegan 7/10 2128 days 5%
Emilie Normand 7/10 2198 days 5%
Christopher Buch Madsen 8/10 2519 days 4%
Phil Bromby 9/10 2521 days 4%
Tobias Thull 7/10 2527 days 4%
Rita Hochstiasser 8/10 2549 days 4%
Nelle Dutilleur 10/10 2570 days 4%
Mathias Butterlin 8/10 2570 days 4%
Daryl 8/10 2578 days 4%
Bert Pubeg 9/10 2644 days 4%
Alex 8/10 2948 days 2%
Lucie 9/10 2984 days 2%
Henzen 9/10 2988 days 2%
Roy Barton 9/10 3251 days 1%
Brian Livesey 9/10 3259 days 1%
Merlyn 8/10 3267 days 1%
Beyeler 10/10 3271 days 1%
Ralf Glaser 7/10 3271 days 1%
Suzanne van Kol 8/10 3276 days 1%
kiwifrenchy 10/10 3283 days 1%
_mel_ 9/10 3314 days 1%
C 10/10 3314 days 1%
Sarah and Soren 10/10 3351 days 1%
Erik Folkersen 10/10 3359 days 1%
Rudlinger 10/10 3362 days 1%
GenH 10/10 3589 days 0%
R Tearle 10/10 3598 days 0%
Franzi & Tobi 10/10 3600 days 0%
Nathalie 10/10 3604 days 0%
Ven 9/10 3606 days 0%
Jerven and Kim 10/10 3613 days 0%
Sarah Luijckx 1/10 3615 days 0%
Alan Jeffery 7/10 3616 days 0%
Birgette Weiner 9/10 3634 days 0%
Tim Van Nispen 9/10 3636 days 0%
Bottcher 10/10 3636 days 0%
Sue & Graham Mullin 10/10 3643 days 0%
John Simpson 9/10 3645 days 0%
Karen Phillips 9/10 3645 days 0%
Michelle Booty 8/10 3647 days 0%
Nadia Husain 7/10 3648 days 0%
Dietmar Gans 10/10 3954 days 2%
Matt Roper 10/10 3976 days 2%
Chris Glasg 10/10 3993 days 2%
Jamie Hallifax 9/10 4004 days 2%
Paul Ritchie 10/10 4008 days 2%
Gerry Donoghue 10/10 4027 days 2%
Yvonne German 9/10 4030 days 2%
DebbieM 5/10 4044 days 2%
mj111 10/10 4044 days 2%
Susann Koschmeider 10/10 4079 days 2%
X Otte 10/10 4083 days 2%
Hans Hoff 10/10 4083 days 2%
Solveig Mosinski 10/10 4087 days 2%
Val and Barnie Weir 10/10 4098 days 2%
Wim Put 9/10 4101 days 2%
discerner 10/10 4105 days 2%
Phillip Reade 10/10 4105 days 2%
Tim Beuzeval 9/10 4105 days 2%
barp 9/10 4136 days 2%
Becky Fairweather 10/10 4289 days 2%
David 10/10 4319 days 2%
martinat 10/10 4319 days 2%
Mike 9/10 4329 days 2%
MichaelS1 9/10 4335 days 2%
StefanieGermany 9/10 4337 days 2%
Veronika 9/10 4339 days 2%
Ralph Boese 7/10 4339 days 2%
ToyalFrance 9/10 4339 days 2%
ReneeA 9/10 4367 days 2%
Lorna 8/10 4369 days 2%
Bruce 10/10 4370 days 2%
Sandra 10/10 4377 days 2%
Heidi 7/10 4384 days 2%
Philipp 9/10 4384 days 2%
Simon 9/10 4386 days 2%
Kathryn 8/10 4387 days 2%
Barbara 9/10 4392 days 2%
Joachim 10/10 4392 days 2%
Ans 7/10 4393 days 2%
Minder 10/10 4394 days 2%
Evi 7/10 4425 days 2%
Ann Maree 9/10 4428 days 2%
Trine 9/10 4438 days 2%
Carina Korn 10/10 4535 days 2%
Christian 7/10 4535 days 2%
Nick 10/10 4538 days 2%
Terri Scott 7/10 4555 days 2%
Alan Bellerby 10/10 4705 days 2%
Robert 4/10 4711 days 1%
Elise 10/10 4711 days 2%
Fung 8/10 4711 days 2%
Peter Aston 9/10 4711 days 2%
Tony Wicks 8/10 4716 days 2%
Sue 8/10 4723 days 2%
Carla 9/10 4731 days 2%
Melissa Steedman 9/10 4758 days 2%
Vanessa Brennan 7/10 4758 days 2%
Tim 9/10 4759 days 2%
Mary 10/10 4809 days 2%
Agnes 9/10 5025 days 2%
Cohen 9/10 5045 days 2%
John 8/10 5049 days 2%
SueLinsk 9/10 5049 days 2%
Frauke 7/10 5091 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

-4.13% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 48 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 -4.07%
198 -4.09%
199 -4.11%
200 -4.13%
201 -4.15%
202 -4.17%
203 -4.19%

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.