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 Ernest Kemp.

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

Ernest Kemp

Valid Reviews

23 Valid Reviews

The Ernest Kemp experience has a total of 23 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 23 valid reviews:

Rating Count Percentage
10/10 7
9/10 5
8/10 3
7/10 4
6/10 2
5/10 0
4/10 1
3/10 0
2/10 1
1/10 0

80.43% Average

The raw data average (mean) for all the Ernest Kemp valid reviews is 80.43% and is based on 23 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

17 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 23 valid reviews, the experience has 17 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 17 face-to-face reviews:

Rating Count Percentage
10/10 6
9/10 3
8/10 2
7/10 3
6/10 2
5/10 0
4/10 1
3/10 0
2/10 0
1/10 0

82.35% Average

The raw data average (mean) for all the Ernest Kemp face-to-face reviews is 82.35% and is based on 17 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

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 Relative Weight
Mary Verissimo 9/10 1407 days 100%
Felicity Ford 6/10 1559 days 75%
Wendy van Boom 7/10 1826 days 71%
Lisa 7/10 1856 days 69%
Frank 7/10 1862 days 69%
Vaclav 10/10 2570 days 42%
Debora Grusler 4/10 2593 days 29%
ebzranapia 10/10 2929 days 24%
Wgtn2 2/10 3294 days 1%
Konny 10/10 3401 days 0%
Alan & Gill Geach 10/10 3682 days 13%
allesca 9/10 3780 days 13%
pedawrds 10/10 4104 days 13%
rolandop 8/10 4119 days 12%
marleen451 7/10 4145 days 11%
Tracy & Peter Cassidy 6/10 4154 days 9%
arthurw 10/10 4232 days 13%
billdee 10/10 4237 days 13%
DaveV 8/10 4375 days 12%
Burkhalter 9/10 4430 days 13%
Melinda 9/10 4444 days 13%
David Finlay 8/10 4631 days 12%
AlanN316 9/10 4740 days 13%


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 Ernest Kemp experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.06% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 56 days. However the Ernest Kemp 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 Ernest Kemp experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.00%
198 -4.02%
199 -4.04%
200 -4.06%
201 -4.08%
202 -4.10%
203 -4.12%

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.