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

45 Valid Reviews

The Ezi Car Rental experience has a total of 54 reviews. There are 45 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 45 valid reviews:

Rating Count Percentage
10/10 8
18%
9/10 9
20%
8/10 5
11%
7/10 1
2%
6/10 1
2%
5/10 0
0%
4/10 1
2%
3/10 0
0%
2/10 3
7%
1/10 17
38%

53.56% Average

The raw data average (mean) for all the Ezi Car Rental valid reviews is 53.56% and is based on 45 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 45 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
20%
9/10 6
40%
8/10 5
33%
7/10 1
7%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
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

53.16%

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
Peter 10/10 20 days 99.94 100%
Rachael 1/10 326 days 60.71 61%
Massis 1/10 357 days 58.26 58%
Bob Swanson 9/10 357 days 79.8 80%
Brent Jackson 1/10 385 days 55.85 56%
Leila Begleiter 10/10 447 days 68.34 68%
Kerrie 1/10 508 days 43.15 43%
Paul Löffler 1/10 569 days 35.66 36%
Rachel Travers 1/10 569 days 35.66 36%
Anthony 4/10 630 days 31.02 31%
Art Hunt 10/10 691 days 30.86 31%
Kent 10/10 691 days 30.86 31%
Lyn Watson 1/10 722 days 19.74 20%
John Ridge 10/10 750 days 23.86 24%
Scott Hargrave 1/10 1026 days 4.2 4%
Karen Gould 1/10 1115 days 3.62 4%
Juana Gutierrez 9/10 1146 days 4.9 5%
B Thomas 2/10 1146 days 3.68 4%
Laszlo Veréb 2/10 1146 days 3.68 4%
Joel Virtanen 8/10 1168 days true 4.61 5%
Maree Smith 1/10 1177 days 3.53 4%
Alan 1/10 1177 days 3.53 4%
Dean P 1/10 1207 days 3.49 3%
Mary Phillips 1/10 1421 days 3.18 3%
Steve 1/10 1421 days 3.18 3%
Amar Zekic 1/10 1452 days 3.14 3%
Dennis Xuereb 8/10 1455 days true 4.08 4%
Jeff Young 6/10 1512 days 3.47 3%
Jeffrey Nelson 9/10 1543 days 4.12 4%
CHuynh 2/10 1634 days 2.96 3%
Alex Adams 1/10 1696 days 2.79 3%
Envor Valensky 1/10 1787 days 2.66 3%
Hannah Bean 9/10 2924 days true 1.42 1%
Nathalie Verzeletti 8/10 3269 days true 0.71 1%
Chris Darlington 10/10 3287 days true 0.71 1%
Matthiis & Femke 7/10 3651 days true 0.0 0%
Aaron 9/10 3654 days true 0.0 0%
Viktoria Stoffel 10/10 3985 days true 0.0 0%
Rachel 9/10 4028 days true 0.0 0%
Claire 9/10 4028 days true 0.0 0%
schenk 8/10 4029 days true 0.0 0%
Caroline 9/10 4036 days true 0.0 0%
De Wijn 10/10 4364 days true 0.0 0%
Greg & Lynette 9/10 4371 days true 0.0 0%
Michael 8/10 4720 days true 0.0 0%

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

Recent Reviews Adjustment

-2.95% 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. There may be an adjustment if an experience hasn't received any reviews within the last 60 days.

The Ezi Car Rental experience has 1 recent ranking. 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 199 days.

The Ezi Car Rental experience has been adjusted for 6 days. Adjustments are according to the following table.

Days Adjustment
3 -0.06%
4 -0.08%
5 -0.10%
6 -0.12%
7 -0.14%
8 -0.16%
9 -0.18%

Final Ranking Score

50%

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.