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

90.18%

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 10/10 654 days 100%
Amanda Walden 10/10 1537 days 11%
Monique Pos 9/10 1627 days 10%
Alison Egan-Jones 9/10 1657 days 10%
Sylvain Schiber 9/10 1658 days 10%
Sylvain Chanton 10/10 1663 days 10%
Julian Gury 8/10 1671 days 9%
R. Damen 9/10 1688 days 10%
Michelle Smit 10/10 1749 days 10%
Gesa Roemer 8/10 1879 days 8%
Anais Roux 10/10 1884 days 9%
Luca Staudt 8/10 1903 days 8%
Florian Bisault 7/10 1904 days 8%
Anna Jungclaus 9/10 1911 days 9%
Signe Broedbaek 7/10 1913 days 8%
Petra Fragner 10/10 1919 days 9%
Koehler Ute 10/10 1931 days 9%
Niclas Ullno 8/10 1934 days 8%
Tamara 7/10 1935 days 8%
Chloe Guerillot 9/10 1945 days 8%
Luisa and Hannes 9/10 1958 days 8%
elena salimzhanova 10/10 1962 days 8%
Jakub Trojanek 8/10 1973 days 8%
Malina 10/10 1979 days 8%
Emma Keegan 7/10 2237 days 6%
Emilie Normand 7/10 2308 days 6%
Christopher Buch Madsen 8/10 2629 days 4%
Phil Bromby 9/10 2631 days 5%
Tobias Thull 7/10 2637 days 4%
Rita Hochstiasser 8/10 2659 days 4%
Nelle Dutilleur 10/10 2680 days 4%
Mathias Butterlin 8/10 2680 days 4%
Daryl 8/10 2688 days 4%
Bert Pubeg 9/10 2754 days 4%
Alex 8/10 3058 days 2%
Lucie 9/10 3094 days 2%
Henzen 9/10 3098 days 2%
Roy Barton 9/10 3361 days 1%
Brian Livesey 9/10 3369 days 1%
Merlyn 8/10 3377 days 0%
Beyeler 10/10 3381 days 1%
Ralf Glaser 7/10 3381 days 0%
Suzanne van Kol 8/10 3386 days 0%
kiwifrenchy 10/10 3393 days 0%
_mel_ 9/10 3424 days 0%
C 10/10 3424 days 0%
Sarah and Soren 10/10 3461 days 0%
Erik Folkersen 10/10 3469 days 0%
Rudlinger 10/10 3472 days 0%
GenH 10/10 3699 days 2%
R Tearle 10/10 3708 days 2%
Franzi & Tobi 10/10 3710 days 2%
Nathalie 10/10 3714 days 2%
Ven 9/10 3716 days 2%
Jerven and Kim 10/10 3723 days 2%
Sarah Luijckx 1/10 3725 days 1%
Alan Jeffery 7/10 3726 days 2%
Birgette Weiner 9/10 3744 days 2%
Tim Van Nispen 9/10 3746 days 2%
Bottcher 10/10 3746 days 2%
Sue & Graham Mullin 10/10 3753 days 2%
John Simpson 9/10 3755 days 2%
Karen Phillips 9/10 3755 days 2%
Michelle Booty 8/10 3757 days 2%
Nadia Husain 7/10 3758 days 2%
Dietmar Gans 10/10 4064 days 2%
Matt Roper 10/10 4086 days 2%
Chris Glasg 10/10 4103 days 2%
Jamie Hallifax 9/10 4114 days 2%
Paul Ritchie 10/10 4118 days 2%
Gerry Donoghue 10/10 4137 days 2%
Yvonne German 9/10 4140 days 2%
DebbieM 5/10 4154 days 1%
mj111 10/10 4154 days 2%
Susann Koschmeider 10/10 4189 days 2%
X Otte 10/10 4193 days 2%
Hans Hoff 10/10 4193 days 2%
Solveig Mosinski 10/10 4197 days 2%
Val and Barnie Weir 10/10 4208 days 2%
Wim Put 9/10 4211 days 2%
discerner 10/10 4215 days 2%
Phillip Reade 10/10 4215 days 2%
Tim Beuzeval 9/10 4215 days 2%
barp 9/10 4246 days 2%
Becky Fairweather 10/10 4399 days 2%
David 10/10 4429 days 2%
martinat 10/10 4429 days 2%
Mike 9/10 4438 days 2%
MichaelS1 9/10 4445 days 2%
StefanieGermany 9/10 4446 days 2%
Veronika 9/10 4448 days 2%
Ralph Boese 7/10 4449 days 2%
ToyalFrance 9/10 4449 days 2%
ReneeA 9/10 4477 days 2%
Lorna 8/10 4478 days 2%
Bruce 10/10 4479 days 2%
Sandra 10/10 4486 days 2%
Heidi 7/10 4493 days 2%
Philipp 9/10 4493 days 2%
Simon 9/10 4495 days 2%
Kathryn 8/10 4496 days 2%
Barbara 9/10 4501 days 2%
Joachim 10/10 4501 days 2%
Ans 7/10 4502 days 2%
Minder 10/10 4503 days 2%
Evi 7/10 4534 days 2%
Ann Maree 9/10 4537 days 2%
Trine 9/10 4547 days 2%
Carina Korn 10/10 4644 days 2%
Christian 7/10 4644 days 2%
Nick 10/10 4647 days 2%
Terri Scott 7/10 4664 days 2%
Alan Bellerby 10/10 4815 days 2%
Robert 4/10 4821 days 1%
Elise 10/10 4821 days 2%
Fung 8/10 4821 days 2%
Peter Aston 9/10 4821 days 2%
Tony Wicks 8/10 4826 days 2%
Sue 8/10 4833 days 2%
Carla 9/10 4841 days 2%
Melissa Steedman 9/10 4868 days 2%
Vanessa Brennan 7/10 4868 days 2%
Tim 9/10 4869 days 2%
Mary 10/10 4919 days 2%
Agnes 9/10 5135 days 2%
Cohen 9/10 5155 days 2%
John 8/10 5159 days 2%
SueLinsk 9/10 5159 days 2%
Frauke 7/10 5201 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

-2.76% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 93 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 -2.72%
198 -2.73%
199 -2.74%
200 -2.76%
201 -2.77%
202 -2.79%
203 -2.80%

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.