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 Wairakei Thermal Valley Campground.

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

Wairakei Thermal Valley Campground

Valid Reviews

32 Valid Reviews

The Wairakei Thermal Valley Campground experience has a total of 35 reviews. There are 32 valid reviews that are included when calculating the ranking score and 3 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.

Within these 32 valid reviews, the experience has 1 face-to-face review collected during interviews by our team.

Below is the distribution of ratings for the 32 valid reviews:

Rating Count Percentage
10/10 7
9/10 8
8/10 5
7/10 2
6/10 1
5/10 1
4/10 1
3/10 2
2/10 2
1/10 3

70.00% Average

The raw data average (mean) for all the Wairakei Thermal Valley Campground valid reviews is 70.00% and is based on 32 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Weighted Average


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
Spoudaios Horaxylon 1/10 182 days 69.17 97%
Christine 1/10 365 days 57.59 81%
Laura Ritchie 9/10 426 days 71.24 100%
Emma 9/10 516 days 57.81 81%
Salpietro Giovanna 1/10 516 days 42.2 59%
Sam 6/10 516 days 47.98 67%
Imaxnz 9/10 547 days 52.59 74%
Hamish & Jax 8/10 730 days 24.81 34%
L + J 4/10 761 days 17.92 25%
Grant Annan 10/10 928 days 9.42 13%
Elizabeth Bellette 10/10 1002 days 6.37 8%
Dalton Howden 8/10 1074 days 4.82 6%
Matt Harrison 10/10 1120 days 4.95 6%
Jamie 3/10 1125 days 3.8 5%
Lisa Yates 10/10 1174 days 4.85 6%
Daniel Teusner 9/10 1216 days 4.76 6%
Matthias Wohlgemuth 3/10 1229 days 3.65 4%
Catherine Kay 9/10 1230 days 4.74 6%
Karien Spruit-Wermeester 8/10 1245 days 4.47 6%
Rikard Pahlen 9/10 1250 days 4.7 6%
Marinette Kegels 9/10 1260 days 4.68 6%
Katie Dalton 10/10 1322 days 4.56 6%
Jeffrey Ross 7/10 1360 days 4.08 5%
Angie Abbink 9/10 1395 days 4.41 6%
Harriet Walker 8/10 1425 days 4.14 5%
Heather Massey 7/10 1603 days 3.65 4%
Christina Sperling 5/10 1673 days 3.13 4%
Allister George 2/10 1684 days 2.89 3%
Keira Savill 2/10 1796 days 2.72 3%
Zoilo Abad 10/10 1929 days 3.37 4%
Malcolm & Susan 8/10 2282 days 2.54 3%
Peter Blaney 10/10 3383 days true 0.52 0%


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 Wairakei Thermal Valley Campground experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-1.78% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 106 days. However the Wairakei Thermal Valley Campground 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 Wairakei Thermal Valley Campground experience has been adjusted for 145 days. Adjustments are according to the following table.

Days Adjustment
142 -1.74%
143 -1.75%
144 -1.77%
145 -1.78%
146 -1.79%
147 -1.80%
148 -1.81%

Final Ranking Score


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.