Ranking Score Explained

Kia ora 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.

Cymen Crick's avatar

Cymen Crick

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

89.07%

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 1067 days 100%
Amanda Walden 10/10 1950 days 63%
Monique Pos 9/10 2040 days 59%
Alison Egan-Jones 9/10 2070 days 58%
Sylvain Schiber 9/10 2071 days 58%
Sylvain Chanton 10/10 2076 days 58%
Julian Gury 8/10 2084 days 54%
R. Damen 9/10 2101 days 57%
Michelle Smit 10/10 2162 days 54%
Gesa Roemer 8/10 2292 days 46%
Anais Roux 10/10 2297 days 49%
Luca Staudt 8/10 2316 days 46%
Florian Bisault 7/10 2317 days 43%
Anna Jungclaus 9/10 2324 days 48%
Signe Broedbaek 7/10 2326 days 43%
Petra Fragner 10/10 2332 days 48%
Koehler Ute 10/10 2344 days 47%
Niclas Ullno 8/10 2347 days 44%
Tamara 7/10 2348 days 42%
Chloe Guerillot 9/10 2358 days 47%
Luisa and Hannes 9/10 2371 days 46%
elena salimzhanova 10/10 2375 days 46%
Jakub Trojanek 8/10 2386 days 43%
Malina 10/10 2392 days 45%
Emma Keegan 7/10 2650 days 31%
Emilie Normand 7/10 2721 days 28%
Christopher Buch Madsen 8/10 3042 days 18%
Phil Bromby 9/10 3044 days 19%
Tobias Thull 7/10 3050 days 16%
Rita Hochstiasser 8/10 3072 days 17%
Nelle Dutilleur 10/10 3093 days 17%
Mathias Butterlin 8/10 3093 days 16%
Daryl 8/10 3101 days 15%
Bert Pubeg 9/10 3167 days 14%
Alex 8/10 3471 days 1%
Lucie 9/10 3507 days 0%
Henzen 9/10 3511 days 0%
Roy Barton 9/10 3774 days 15%
Brian Livesey 9/10 3782 days 15%
Merlyn 8/10 3790 days 14%
Beyeler 10/10 3794 days 15%
Ralf Glaser 7/10 3794 days 13%
Suzanne van Kol 8/10 3799 days 14%
kiwifrenchy 10/10 3806 days 15%
_mel_ 9/10 3837 days 15%
C 10/10 3837 days 15%
Sarah and Soren 10/10 3874 days 15%
Erik Folkersen 10/10 3882 days 15%
Rudlinger 10/10 3885 days 15%
GenH 10/10 4112 days 15%
R Tearle 10/10 4121 days 15%
Franzi & Tobi 10/10 4123 days 15%
Nathalie 10/10 4127 days 15%
Ven 9/10 4129 days 15%
Jerven and Kim 10/10 4136 days 15%
Sarah Luijckx 1/10 4138 days 9%
Alan Jeffery 7/10 4139 days 13%
Birgette Weiner 9/10 4157 days 15%
Tim Van Nispen 9/10 4159 days 15%
Bottcher 10/10 4159 days 15%
Sue & Graham Mullin 10/10 4166 days 15%
John Simpson 9/10 4168 days 15%
Karen Phillips 9/10 4168 days 15%
Michelle Booty 8/10 4170 days 14%
Nadia Husain 7/10 4171 days 13%
Dietmar Gans 10/10 4477 days 15%
Matt Roper 10/10 4499 days 15%
Chris Glasg 10/10 4516 days 15%
Jamie Hallifax 9/10 4527 days 15%
Paul Ritchie 10/10 4531 days 15%
Gerry Donoghue 10/10 4550 days 15%
Yvonne German 9/10 4553 days 15%
DebbieM 5/10 4567 days 11%
mj111 10/10 4567 days 15%
Susann Koschmeider 10/10 4602 days 15%
X Otte 10/10 4606 days 15%
Hans Hoff 10/10 4606 days 15%
Solveig Mosinski 10/10 4610 days 15%
Val and Barnie Weir 10/10 4621 days 15%
Wim Put 9/10 4624 days 15%
discerner 10/10 4628 days 15%
Phillip Reade 10/10 4628 days 15%
Tim Beuzeval 9/10 4628 days 15%
barp 9/10 4659 days 15%
Becky Fairweather 10/10 4812 days 15%
David 10/10 4842 days 15%
martinat 10/10 4842 days 15%
Mike 9/10 4851 days 15%
MichaelS1 9/10 4858 days 15%
StefanieGermany 9/10 4859 days 15%
Veronika 9/10 4861 days 15%
Ralph Boese 7/10 4862 days 13%
ToyalFrance 9/10 4862 days 15%
ReneeA 9/10 4890 days 15%
Lorna 8/10 4891 days 14%
Bruce 10/10 4892 days 15%
Sandra 10/10 4899 days 15%
Heidi 7/10 4906 days 13%
Philipp 9/10 4906 days 15%
Simon 9/10 4908 days 15%
Kathryn 8/10 4909 days 14%
Barbara 9/10 4914 days 15%
Joachim 10/10 4914 days 15%
Ans 7/10 4915 days 13%
Minder 10/10 4916 days 15%
Evi 7/10 4947 days 13%
Ann Maree 9/10 4950 days 15%
Trine 9/10 4960 days 15%
Carina Korn 10/10 5058 days 15%
Christian 7/10 5058 days 13%
Nick 10/10 5060 days 15%
Terri Scott 7/10 5077 days 13%
Alan Bellerby 10/10 5228 days 15%
Robert 4/10 5234 days 11%
Elise 10/10 5234 days 15%
Fung 8/10 5234 days 14%
Peter Aston 9/10 5234 days 15%
Tony Wicks 8/10 5239 days 14%
Sue 8/10 5246 days 14%
Carla 9/10 5254 days 15%
Melissa Steedman 9/10 5281 days 15%
Vanessa Brennan 7/10 5281 days 13%
Tim 9/10 5282 days 15%
Mary 10/10 5332 days 15%
Agnes 9/10 5548 days 15%
Cohen 9/10 5568 days 15%
John 8/10 5572 days 14%
SueLinsk 9/10 5572 days 15%
Frauke 7/10 5614 days 13%

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

-2.03% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 123 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 -1.99%
198 -2.00%
199 -2.02%
200 -2.03%
201 -2.04%
202 -2.05%
203 -2.06%

Final Ranking Score

87%

The final ranking score once any adjustments, ratings, 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.