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

92.09%

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 10/10 379 days 77.24 100%
Amanda Walden 10/10 1262 days 4.67 6%
Monique Pos 9/10 1352 days 4.5 6%
Alison Egan-Jones 9/10 1382 days 4.44 6%
Sylvain Schiber 9/10 1383 days 4.44 6%
Sylvain Chanton 10/10 1388 days true 4.43 6%
Julian Gury 8/10 1396 days true 4.19 5%
R. Damen 9/10 1413 days 4.38 6%
Michelle Smit 10/10 1474 days 4.26 6%
Gesa Roemer 8/10 1604 days true 3.8 5%
Anais Roux 10/10 1609 days true 3.99 5%
Luca Staudt 8/10 1628 days true 3.76 5%
Florian Bisault 7/10 1629 days true 3.6 5%
Anna Jungclaus 9/10 1636 days true 3.94 5%
Signe Broedbaek 7/10 1638 days true 3.58 5%
Petra Fragner 10/10 1644 days true 3.93 5%
Koehler Ute 10/10 1656 days 3.9 5%
Niclas Ullno 8/10 1659 days true 3.7 5%
Tamara 7/10 1660 days true 3.54 5%
Chloe Guerillot 9/10 1670 days true 3.87 5%
Luisa and Hannes 9/10 1683 days true 3.85 5%
elena salimzhanova 10/10 1687 days 3.84 5%
Jakub Trojanek 8/10 1698 days true 3.63 5%
Malina 10/10 1704 days true 3.81 5%
Emma Keegan 7/10 1962 days 3.01 4%
Emilie Normand 7/10 2033 days true 2.88 4%
Christopher Buch Madsen 8/10 2354 days true 2.41 3%
Phil Bromby 9/10 2356 days true 2.53 3%
Tobias Thull 7/10 2362 days true 2.29 3%
Rita Hochstiasser 8/10 2384 days true 2.35 3%
Nelle Dutilleur 10/10 2405 days true 2.44 3%
Mathias Butterlin 8/10 2405 days true 2.31 3%
Daryl 8/10 2413 days true 2.3 3%
Bert Pubeg 9/10 2479 days 2.29 3%
Alex 8/10 2783 days 1.61 2%
Lucie 9/10 2819 days true 1.63 2%
Henzen 9/10 2823 days true 1.62 2%
Roy Barton 9/10 3086 days true 1.1 1%
Brian Livesey 9/10 3094 days true 1.09 1%
Merlyn 8/10 3102 days true 1.02 1%
Beyeler 10/10 3106 days true 1.06 1%
Ralf Glaser 7/10 3106 days true 0.97 1%
Suzanne van Kol 8/10 3111 days true 1.0 1%
kiwifrenchy 10/10 3118 days 1.04 1%
_mel_ 9/10 3149 days 0.98 1%
C 10/10 3149 days 0.98 1%
Sarah and Soren 10/10 3186 days true 0.91 1%
Erik Folkersen 10/10 3194 days true 0.89 1%
Rudlinger 10/10 3197 days true 0.89 1%
GenH 10/10 3424 days 0.44 1%
R Tearle 10/10 3433 days true 0.42 1%
Franzi & Tobi 10/10 3435 days true 0.42 1%
Nathalie 10/10 3439 days true 0.41 1%
Ven 9/10 3441 days true 0.41 1%
Jerven and Kim 10/10 3448 days true 0.4 1%
Sarah Luijckx 1/10 3450 days true 0.29 0%
Alan Jeffery 7/10 3451 days true 0.35 0%
Birgette Weiner 9/10 3469 days true 0.35 0%
Tim Van Nispen 9/10 3471 days true 0.35 0%
Bottcher 10/10 3471 days true 0.35 0%
Sue & Graham Mullin 10/10 3478 days true 0.34 0%
John Simpson 9/10 3480 days true 0.33 0%
Karen Phillips 9/10 3480 days true 0.33 0%
Michelle Booty 8/10 3482 days true 0.31 0%
Nadia Husain 7/10 3483 days true 0.3 0%
Dietmar Gans 10/10 3789 days 0.0 0%
Matt Roper 10/10 3811 days true 0.0 0%
Chris Glasg 10/10 3828 days true 0.0 0%
Jamie Hallifax 9/10 3839 days true 0.0 0%
Paul Ritchie 10/10 3843 days true 0.0 0%
Gerry Donoghue 10/10 3862 days true 0.0 0%
Yvonne German 9/10 3865 days true 0.0 0%
DebbieM 5/10 3879 days 0.0 0%
mj111 10/10 3879 days 0.0 0%
Susann Koschmeider 10/10 3914 days true 0.0 0%
X Otte 10/10 3918 days true 0.0 0%
Hans Hoff 10/10 3918 days true 0.0 0%
Solveig Mosinski 10/10 3922 days true 0.0 0%
Val and Barnie Weir 10/10 3933 days true 0.0 0%
Wim Put 9/10 3936 days true 0.0 0%
discerner 10/10 3940 days 0.0 0%
Phillip Reade 10/10 3940 days 0.0 0%
Tim Beuzeval 9/10 3940 days true 0.0 0%
barp 9/10 3971 days true 0.0 0%
Becky Fairweather 10/10 4124 days 0.0 0%
David 10/10 4154 days 0.0 0%
martinat 10/10 4154 days true 0.0 0%
Mike 9/10 4163 days true 0.0 0%
MichaelS1 9/10 4170 days true 0.0 0%
StefanieGermany 9/10 4171 days true 0.0 0%
Veronika 9/10 4173 days true 0.0 0%
Ralph Boese 7/10 4174 days true 0.0 0%
ToyalFrance 9/10 4174 days true 0.0 0%
ReneeA 9/10 4202 days true 0.0 0%
Lorna 8/10 4203 days true 0.0 0%
Bruce 10/10 4204 days true 0.0 0%
Sandra 10/10 4211 days true 0.0 0%
Heidi 7/10 4218 days true 0.0 0%
Philipp 9/10 4218 days true 0.0 0%
Simon 9/10 4220 days true 0.0 0%
Kathryn 8/10 4221 days true 0.0 0%
Barbara 9/10 4226 days true 0.0 0%
Joachim 10/10 4226 days true 0.0 0%
Ans 7/10 4227 days true 0.0 0%
Minder 10/10 4228 days true 0.0 0%
Evi 7/10 4259 days true 0.0 0%
Ann Maree 9/10 4262 days 0.0 0%
Trine 9/10 4272 days true 0.0 0%
Carina Korn 10/10 4369 days true 0.0 0%
Christian 7/10 4369 days true 0.0 0%
Nick 10/10 4372 days true 0.0 0%
Terri Scott 7/10 4389 days true 0.0 0%
Alan Bellerby 10/10 4540 days true 0.0 0%
Robert 4/10 4546 days true 0.0 0%
Elise 10/10 4546 days true 0.0 0%
Fung 8/10 4546 days true 0.0 0%
Peter Aston 9/10 4546 days true 0.0 0%
Tony Wicks 8/10 4551 days true 0.0 0%
Sue 8/10 4558 days true 0.0 0%
Carla 9/10 4566 days true 0.0 0%
Melissa Steedman 9/10 4593 days true 0.0 0%
Vanessa Brennan 7/10 4593 days true 0.0 0%
Tim 9/10 4594 days true 0.0 0%
Mary 10/10 4644 days true 0.0 0%
Agnes 9/10 4860 days true 0.0 0%
Cohen 9/10 4880 days true 0.0 0%
John 8/10 4884 days true 0.0 0%
SueLinsk 9/10 4884 days true 0.0 0%
Frauke 7/10 4926 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

-2.31% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 113 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 -2.28%
198 -2.29%
199 -2.30%
200 -2.31%
201 -2.32%
202 -2.33%
203 -2.35%

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.