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

89.42%

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 10/10 853 days 100%
Amanda Walden 10/10 1736 days 26%
Monique Pos 9/10 1826 days 25%
Alison Egan-Jones 9/10 1856 days 24%
Sylvain Schiber 9/10 1857 days 24%
Sylvain Chanton 10/10 1862 days 24%
Julian Gury 8/10 1870 days 23%
R. Damen 9/10 1887 days 24%
Michelle Smit 10/10 1948 days 23%
Gesa Roemer 8/10 2078 days 20%
Anais Roux 10/10 2083 days 21%
Luca Staudt 8/10 2102 days 20%
Florian Bisault 7/10 2103 days 19%
Anna Jungclaus 9/10 2110 days 21%
Signe Broedbaek 7/10 2112 days 19%
Petra Fragner 10/10 2118 days 21%
Koehler Ute 10/10 2130 days 21%
Niclas Ullno 8/10 2133 days 19%
Tamara 7/10 2134 days 19%
Chloe Guerillot 9/10 2144 days 20%
Luisa and Hannes 9/10 2157 days 20%
elena salimzhanova 10/10 2161 days 20%
Jakub Trojanek 8/10 2172 days 19%
Malina 10/10 2178 days 20%
Emma Keegan 7/10 2436 days 15%
Emilie Normand 7/10 2507 days 14%
Christopher Buch Madsen 8/10 2828 days 10%
Phil Bromby 9/10 2830 days 11%
Tobias Thull 7/10 2836 days 10%
Rita Hochstiasser 8/10 2858 days 10%
Nelle Dutilleur 10/10 2879 days 10%
Mathias Butterlin 8/10 2879 days 10%
Daryl 8/10 2887 days 10%
Bert Pubeg 9/10 2953 days 9%
Alex 8/10 3257 days 5%
Lucie 9/10 3293 days 5%
Henzen 9/10 3297 days 4%
Roy Barton 9/10 3560 days 1%
Brian Livesey 9/10 3568 days 1%
Merlyn 8/10 3576 days 1%
Beyeler 10/10 3580 days 1%
Ralf Glaser 7/10 3580 days 1%
Suzanne van Kol 8/10 3585 days 0%
kiwifrenchy 10/10 3592 days 0%
_mel_ 9/10 3623 days 0%
C 10/10 3623 days 0%
Sarah and Soren 10/10 3660 days 7%
Erik Folkersen 10/10 3668 days 7%
Rudlinger 10/10 3671 days 7%
GenH 10/10 3898 days 7%
R Tearle 10/10 3907 days 7%
Franzi & Tobi 10/10 3909 days 7%
Nathalie 10/10 3913 days 7%
Ven 9/10 3915 days 7%
Jerven and Kim 10/10 3922 days 7%
Sarah Luijckx 1/10 3924 days 5%
Alan Jeffery 7/10 3925 days 6%
Birgette Weiner 9/10 3943 days 7%
Tim Van Nispen 9/10 3945 days 7%
Bottcher 10/10 3945 days 7%
Sue & Graham Mullin 10/10 3952 days 7%
John Simpson 9/10 3954 days 7%
Karen Phillips 9/10 3954 days 7%
Michelle Booty 8/10 3956 days 6%
Nadia Husain 7/10 3957 days 6%
Dietmar Gans 10/10 4263 days 7%
Matt Roper 10/10 4285 days 7%
Chris Glasg 10/10 4302 days 7%
Jamie Hallifax 9/10 4313 days 7%
Paul Ritchie 10/10 4317 days 7%
Gerry Donoghue 10/10 4336 days 7%
Yvonne German 9/10 4339 days 7%
DebbieM 5/10 4353 days 5%
mj111 10/10 4353 days 7%
Susann Koschmeider 10/10 4388 days 7%
X Otte 10/10 4392 days 7%
Hans Hoff 10/10 4392 days 7%
Solveig Mosinski 10/10 4396 days 7%
Val and Barnie Weir 10/10 4407 days 7%
Wim Put 9/10 4410 days 7%
discerner 10/10 4414 days 7%
Phillip Reade 10/10 4414 days 7%
Tim Beuzeval 9/10 4414 days 7%
barp 9/10 4445 days 7%
Becky Fairweather 10/10 4597 days 7%
David 10/10 4628 days 7%
martinat 10/10 4628 days 7%
Mike 9/10 4637 days 7%
MichaelS1 9/10 4644 days 7%
StefanieGermany 9/10 4645 days 7%
Veronika 9/10 4647 days 7%
Ralph Boese 7/10 4648 days 6%
ToyalFrance 9/10 4648 days 7%
ReneeA 9/10 4676 days 7%
Lorna 8/10 4677 days 6%
Bruce 10/10 4678 days 7%
Sandra 10/10 4685 days 7%
Heidi 7/10 4692 days 6%
Philipp 9/10 4692 days 7%
Simon 9/10 4694 days 7%
Kathryn 8/10 4695 days 6%
Barbara 9/10 4700 days 7%
Joachim 10/10 4700 days 7%
Ans 7/10 4701 days 6%
Minder 10/10 4702 days 7%
Evi 7/10 4733 days 6%
Ann Maree 9/10 4736 days 7%
Trine 9/10 4746 days 7%
Carina Korn 10/10 4843 days 7%
Christian 7/10 4843 days 6%
Nick 10/10 4846 days 7%
Terri Scott 7/10 4863 days 6%
Alan Bellerby 10/10 5014 days 7%
Robert 4/10 5020 days 5%
Elise 10/10 5020 days 7%
Fung 8/10 5020 days 6%
Peter Aston 9/10 5020 days 7%
Tony Wicks 8/10 5025 days 6%
Sue 8/10 5032 days 6%
Carla 9/10 5040 days 7%
Melissa Steedman 9/10 5067 days 7%
Vanessa Brennan 7/10 5067 days 6%
Tim 9/10 5068 days 7%
Mary 10/10 5118 days 7%
Agnes 9/10 5333 days 7%
Cohen 9/10 5353 days 7%
John 8/10 5357 days 6%
SueLinsk 9/10 5357 days 7%
Frauke 7/10 5400 days 6%

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

-4.07% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 43 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 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

Final Ranking Score

85%

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.