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

92.11%

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 Face-to-Face Weight Relative Weight
Matthew Mutimer 10/10 370 days 78.31 100%
Amanda Walden 10/10 1253 days 4.69 6%
Monique Pos 9/10 1343 days 4.51 6%
Alison Egan-Jones 9/10 1373 days 4.46 6%
Sylvain Schiber 9/10 1374 days 4.45 6%
Sylvain Chanton 10/10 1379 days true 4.44 6%
Julian Gury 8/10 1387 days true 4.21 5%
R. Damen 9/10 1404 days 4.4 6%
Michelle Smit 10/10 1465 days 4.28 5%
Gesa Roemer 8/10 1595 days true 3.82 5%
Anais Roux 10/10 1600 days true 4.01 5%
Luca Staudt 8/10 1619 days true 3.78 5%
Florian Bisault 7/10 1620 days true 3.62 5%
Anna Jungclaus 9/10 1627 days true 3.96 5%
Signe Broedbaek 7/10 1629 days true 3.6 5%
Petra Fragner 10/10 1635 days true 3.94 5%
Koehler Ute 10/10 1647 days 3.92 5%
Niclas Ullno 8/10 1650 days true 3.72 5%
Tamara 7/10 1651 days true 3.56 5%
Chloe Guerillot 9/10 1661 days true 3.89 5%
Luisa and Hannes 9/10 1674 days true 3.87 5%
elena salimzhanova 10/10 1678 days 3.86 5%
Jakub Trojanek 8/10 1689 days true 3.65 5%
Malina 10/10 1695 days true 3.83 5%
Emma Keegan 7/10 1953 days 3.02 4%
Emilie Normand 7/10 2024 days true 2.9 4%
Christopher Buch Madsen 8/10 2345 days true 2.43 3%
Phil Bromby 9/10 2347 days true 2.55 3%
Tobias Thull 7/10 2353 days true 2.31 3%
Rita Hochstiasser 8/10 2375 days true 2.37 3%
Nelle Dutilleur 10/10 2396 days true 2.45 3%
Mathias Butterlin 8/10 2396 days true 2.33 3%
Daryl 8/10 2404 days true 2.32 3%
Bert Pubeg 9/10 2470 days 2.31 3%
Alex 8/10 2774 days 1.63 2%
Lucie 9/10 2810 days true 1.64 2%
Henzen 9/10 2814 days true 1.64 2%
Roy Barton 9/10 3077 days true 1.12 1%
Brian Livesey 9/10 3085 days true 1.11 1%
Merlyn 8/10 3093 days true 1.04 1%
Beyeler 10/10 3097 days true 1.08 1%
Ralf Glaser 7/10 3097 days true 0.98 1%
Suzanne van Kol 8/10 3102 days true 1.02 1%
kiwifrenchy 10/10 3109 days 1.06 1%
_mel_ 9/10 3140 days 1.0 1%
C 10/10 3140 days 1.0 1%
Sarah and Soren 10/10 3177 days true 0.93 1%
Erik Folkersen 10/10 3185 days true 0.91 1%
Rudlinger 10/10 3188 days true 0.9 1%
GenH 10/10 3415 days 0.46 1%
R Tearle 10/10 3424 days true 0.44 1%
Franzi & Tobi 10/10 3426 days true 0.44 1%
Nathalie 10/10 3430 days true 0.43 1%
Ven 9/10 3432 days true 0.43 1%
Jerven and Kim 10/10 3439 days true 0.41 1%
Sarah Luijckx 1/10 3441 days true 0.3 0%
Alan Jeffery 7/10 3442 days true 0.37 0%
Birgette Weiner 9/10 3460 days true 0.37 0%
Tim Van Nispen 9/10 3462 days true 0.37 0%
Bottcher 10/10 3462 days true 0.37 0%
Sue & Graham Mullin 10/10 3469 days true 0.35 0%
John Simpson 9/10 3471 days true 0.35 0%
Karen Phillips 9/10 3471 days true 0.35 0%
Michelle Booty 8/10 3473 days true 0.33 0%
Nadia Husain 7/10 3474 days true 0.31 0%
Dietmar Gans 10/10 3780 days 0.0 0%
Matt Roper 10/10 3802 days true 0.0 0%
Chris Glasg 10/10 3819 days true 0.0 0%
Jamie Hallifax 9/10 3830 days true 0.0 0%
Paul Ritchie 10/10 3834 days true 0.0 0%
Gerry Donoghue 10/10 3853 days true 0.0 0%
Yvonne German 9/10 3856 days true 0.0 0%
DebbieM 5/10 3870 days 0.0 0%
mj111 10/10 3870 days 0.0 0%
Susann Koschmeider 10/10 3905 days true 0.0 0%
X Otte 10/10 3909 days true 0.0 0%
Hans Hoff 10/10 3909 days true 0.0 0%
Solveig Mosinski 10/10 3913 days true 0.0 0%
Val and Barnie Weir 10/10 3924 days true 0.0 0%
Wim Put 9/10 3927 days true 0.0 0%
discerner 10/10 3931 days 0.0 0%
Phillip Reade 10/10 3931 days 0.0 0%
Tim Beuzeval 9/10 3931 days true 0.0 0%
barp 9/10 3962 days true 0.0 0%
Becky Fairweather 10/10 4115 days 0.0 0%
David 10/10 4145 days 0.0 0%
martinat 10/10 4145 days true 0.0 0%
Mike 9/10 4154 days true 0.0 0%
MichaelS1 9/10 4161 days true 0.0 0%
StefanieGermany 9/10 4162 days true 0.0 0%
Veronika 9/10 4164 days true 0.0 0%
Ralph Boese 7/10 4165 days true 0.0 0%
ToyalFrance 9/10 4165 days true 0.0 0%
ReneeA 9/10 4193 days true 0.0 0%
Lorna 8/10 4194 days true 0.0 0%
Bruce 10/10 4195 days true 0.0 0%
Sandra 10/10 4202 days true 0.0 0%
Heidi 7/10 4209 days true 0.0 0%
Philipp 9/10 4209 days true 0.0 0%
Simon 9/10 4211 days true 0.0 0%
Kathryn 8/10 4212 days true 0.0 0%
Barbara 9/10 4217 days true 0.0 0%
Joachim 10/10 4217 days true 0.0 0%
Ans 7/10 4218 days true 0.0 0%
Minder 10/10 4219 days true 0.0 0%
Evi 7/10 4250 days true 0.0 0%
Ann Maree 9/10 4253 days 0.0 0%
Trine 9/10 4263 days true 0.0 0%
Carina Korn 10/10 4360 days true 0.0 0%
Christian 7/10 4360 days true 0.0 0%
Nick 10/10 4363 days true 0.0 0%
Terri Scott 7/10 4380 days true 0.0 0%
Alan Bellerby 10/10 4531 days true 0.0 0%
Robert 4/10 4537 days true 0.0 0%
Elise 10/10 4537 days true 0.0 0%
Fung 8/10 4537 days true 0.0 0%
Peter Aston 9/10 4537 days true 0.0 0%
Tony Wicks 8/10 4542 days true 0.0 0%
Sue 8/10 4549 days true 0.0 0%
Carla 9/10 4557 days true 0.0 0%
Melissa Steedman 9/10 4584 days true 0.0 0%
Vanessa Brennan 7/10 4584 days true 0.0 0%
Tim 9/10 4585 days true 0.0 0%
Mary 10/10 4635 days true 0.0 0%
Agnes 9/10 4851 days true 0.0 0%
Cohen 9/10 4871 days true 0.0 0%
John 8/10 4875 days true 0.0 0%
SueLinsk 9/10 4875 days true 0.0 0%
Frauke 7/10 4917 days true 0.0 0%

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

-2.18% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 120 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 -2.14%
198 -2.15%
199 -2.17%
200 -2.18%
201 -2.19%
202 -2.20%
203 -2.21%

Final Ranking Score

90%

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.