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 Hertz Rent a Car.

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

Hertz Rent a Car

Valid Reviews

34 Valid Reviews

The Hertz Rent a Car experience has a total of 36 reviews. There are 34 valid reviews that are included when calculating the ranking score and 2 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 34 valid reviews:

Rating Count Percentage
10/10 2
6%
9/10 8
24%
8/10 9
26%
7/10 2
6%
6/10 2
6%
5/10 0
0%
4/10 0
0%
3/10 1
3%
2/10 2
6%
1/10 8
24%

60.29% Average

The raw data average (mean) for all the Hertz Rent a Car valid reviews is 60.29% and is based on 34 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

21 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 34 valid reviews, the experience has 21 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 21 face-to-face reviews:

Rating Count Percentage
10/10 2
10%
9/10 8
38%
8/10 9
43%
7/10 2
10%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

84.76% Average

The raw data average (mean) for all the Hertz Rent a Car face-to-face reviews is 84.76% and is based on 21 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

14.07%

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
Rory K 1/10 268 days 64.69 100%
Milan 1/10 299 days 62.66 97%
Ely 1/10 329 days 60.48 93%
Leah 1/10 388 days 55.59 86%
Kyla 1/10 541 days 39.14 61%
A very grumpy customer 1/10 694 days 22.25 34%
Ashley Butler 8/10 1094 days true 4.75 7%
Saili Shah 2/10 1423 days 3.27 5%
Megan Anonymous 1/10 1514 days 3.05 5%
bob marshall 2/10 1820 days 2.69 4%
Tris Sol 1/10 1910 days 2.49 4%
Patricia Erni 9/10 2164 days true 2.91 4%
Manuel Bleiker 9/10 2164 days true 2.91 4%
John Adams 6/10 2610 days 1.69 3%
yardley54 3/10 2641 days 1.52 2%
Frank Band 8/10 2920 days true 1.36 2%
David & Sue Lokkerbol 8/10 2931 days true 1.34 2%
Urban Reifler 9/10 2956 days true 1.36 2%
Dane & Julz 7/10 3281 days true 0.66 1%
Valerie 9/10 3296 days true 0.69 1%
Angela Stringer 6/10 3706 days 0.0 0%
Steve 8/10 3987 days true 0.0 0%
DimitriD 8/10 3998 days true 0.0 0%
InkenGermany 9/10 4023 days true 0.0 0%
Sid 9/10 4121 days true 0.0 0%
Fothergill 10/10 4187 days true 0.0 0%
Corinne Henville 9/10 4357 days true 0.0 0%
Roger Mills 9/10 4424 days true 0.0 0%
Dorris Schwarz 8/10 4427 days true 0.0 0%
Anu 8/10 4427 days true 0.0 0%
Connor 10/10 4450 days true 0.0 0%
lawrence Walker 8/10 4455 days true 0.0 0%
Ard 8/10 4456 days true 0.0 0%
Detlef 7/10 4725 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 Hertz Rent a Car experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-6.98% 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 Hertz Rent a Car 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 199 days.

The Hertz Rent a Car experience has been adjusted for 199 days. Adjustments are according to the following table.

Days Adjustment
196 -3.92%
197 -3.94%
198 -3.96%
199 -3.98%
200 -4.00%
201 -4.02%
202 -4.04%

Final Ranking Score

7%

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.