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 Ezi Car Rental.

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

Ezi Car Rental

Valid Reviews

50 Valid Reviews

The Ezi Car Rental experience has a total of 59 reviews. There are 50 valid reviews that are included when calculating the ranking score and 9 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 50 valid reviews:

Rating Count Percentage
10/10 11
9/10 9
8/10 5
7/10 1
6/10 1
5/10 0
4/10 1
3/10 0
2/10 4
1/10 18

54.80% Average

The raw data average (mean) for all the Ezi Car Rental valid reviews is 54.80% and is based on 50 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

15 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 50 valid reviews, the experience has 15 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 15 face-to-face reviews:

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

87.33% Average

The raw data average (mean) for all the Ezi Car Rental face-to-face reviews is 87.33% and is based on 15 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
Kolora 10/10 114 days 100%
Kimberley 10/10 236 days 93%
D Collins 1/10 328 days 62%
Peter 10/10 357 days 81%
Matt Tofia 2/10 357 days 61%
Rachael 1/10 663 days 26%
Massis 1/10 694 days 23%
Bob Swanson 9/10 694 days 31%
Brent Jackson 1/10 722 days 20%
Leila Begleiter 10/10 784 days 21%
Kerrie 1/10 845 days 11%
Paul Löffler 1/10 906 days 8%
Rachel Travers 1/10 906 days 8%
Tom Butlin 10/10 937 days 9%
Anthony 4/10 967 days 6%
Art Hunt 10/10 1028 days 6%
Kent 10/10 1028 days 6%
Lyn Watson 1/10 1059 days 4%
John Ridge 10/10 1087 days 5%
Scott Hargrave 1/10 1363 days 3%
Karen Gould 1/10 1452 days 3%
Juana Gutierrez 9/10 1483 days 4%
B Thomas 2/10 1483 days 3%
Laszlo Veréb 2/10 1483 days 3%
Joel Virtanen 8/10 1505 days 3%
Maree Smith 1/10 1514 days 3%
Alan 1/10 1514 days 3%
Dean P 1/10 1544 days 3%
Mary Phillips 1/10 1758 days 3%
Steve 1/10 1758 days 3%
Amar Zekic 1/10 1789 days 3%
Dennis Xuereb 8/10 1792 days 3%
Jeff Young 6/10 1849 days 3%
Jeffrey Nelson 9/10 1880 days 3%
CHuynh 2/10 1971 days 2%
Alex Adams 1/10 2033 days 2%
Envor Valensky 1/10 2124 days 2%
Hannah Bean 9/10 3261 days 1%
Nathalie Verzeletti 8/10 3606 days 0%
Chris Darlington 10/10 3624 days 0%
Matthiis & Femke 7/10 3988 days 1%
Aaron 9/10 3991 days 1%
Viktoria Stoffel 10/10 4322 days 1%
Rachel 9/10 4364 days 1%
Claire 9/10 4365 days 1%
schenk 8/10 4366 days 1%
Caroline 9/10 4372 days 1%
De Wijn 10/10 4701 days 1%
Greg & Lynette 9/10 4708 days 1%
Michael 8/10 5057 days 1%


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 Ezi Car Rental experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.97% Adjustment

Recent reviews reflect the experience as it currently operates. This means it's important to get fresh reviews. Some experiences discovered they could get a few good reviews and then, resting on their laurels, discourage any further reviews. This adjustment stimulates experiences to be positively involved in the review generating process and discourages them from manipulating the ranking system in this manner.

What constitutes a recent review is based on the how old it is, what type of experience it is applied to and and what time of year it currently is. Due to the seasonal nature of many businesses, what is considered recent is dynamically adjusted throughout the year.

There may be an adjustment if this experience hasn't received enough reviews within the last 48 days. The Ezi Car Rental experience has 0 recent rankings. Adjustments are according to the following table:

Recent Reviews Adjustment
0 -3.00%
1 -2.83%
2 -2.33%
3 -1.50%
4 -0.67%
5 -0.17%
6 -0.00%

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 Ezi Car Rental experience has been adjusted for 96 days. Adjustments are according to the following table.

Days Adjustment
93 -1.91%
94 -1.93%
95 -1.95%
96 -1.97%
97 -2.00%
98 -2.02%
99 -2.04%

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.