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

51 Valid Reviews

The Ezi Car Rental experience has a total of 60 reviews. There are 51 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 51 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 19

53.92% Average

The raw data average (mean) for all the Ezi Car Rental valid reviews is 53.92% and is based on 51 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 51 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
Rachel 1/10 76 days 94%
Kolora 10/10 380 days 100%
Kimberley 10/10 502 days 78%
D Collins 1/10 594 days 42%
Peter 10/10 623 days 52%
Matt Tofia 2/10 623 days 39%
Rachael 1/10 929 days 9%
Massis 1/10 960 days 7%
Bob Swanson 9/10 960 days 10%
Brent Jackson 1/10 988 days 6%
Leila Begleiter 10/10 1050 days 7%
Kerrie 1/10 1111 days 4%
Paul Löffler 1/10 1172 days 4%
Rachel Travers 1/10 1172 days 4%
Tom Butlin 10/10 1203 days 6%
Anthony 4/10 1233 days 5%
Art Hunt 10/10 1294 days 6%
Kent 10/10 1294 days 6%
Lyn Watson 1/10 1325 days 4%
John Ridge 10/10 1353 days 6%
Scott Hargrave 1/10 1629 days 3%
Karen Gould 1/10 1718 days 3%
Juana Gutierrez 9/10 1749 days 5%
B Thomas 2/10 1749 days 3%
Laszlo Veréb 2/10 1749 days 3%
Joel Virtanen 8/10 1771 days 3%
Maree Smith 1/10 1780 days 3%
Alan 1/10 1780 days 3%
Dean P 1/10 1810 days 3%
Mary Phillips 1/10 2024 days 3%
Steve 1/10 2024 days 3%
Amar Zekic 1/10 2055 days 3%
Dennis Xuereb 8/10 2058 days 3%
Jeff Young 6/10 2115 days 3%
Jeffrey Nelson 9/10 2146 days 4%
CHuynh 2/10 2237 days 2%
Alex Adams 1/10 2299 days 2%
Envor Valensky 1/10 2390 days 2%
Hannah Bean 9/10 3527 days 0%
Nathalie Verzeletti 8/10 3872 days 1%
Chris Darlington 10/10 3890 days 1%
Matthiis & Femke 7/10 4254 days 1%
Aaron 9/10 4257 days 1%
Viktoria Stoffel 10/10 4588 days 1%
Rachel 9/10 4630 days 1%
Claire 9/10 4630 days 1%
schenk 8/10 4632 days 1%
Caroline 9/10 4638 days 1%
De Wijn 10/10 4967 days 1%
Greg & Lynette 9/10 4974 days 1%
Michael 8/10 5323 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

-4.22% 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 59 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 68 days. Adjustments are according to the following table.

Days Adjustment
65 -1.16%
66 -1.18%
67 -1.20%
68 -1.22%
69 -1.24%
70 -1.25%
71 -1.27%

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.