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

36 Valid Reviews

The Hertz Rent a Car experience has a total of 39 reviews. There are 36 valid reviews that are included when calculating the ranking score and 3 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 36 valid reviews:

Rating Count Percentage
10/10 2
6%
9/10 8
22%
8/10 9
25%
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 10
28%

57.50% Average

The raw data average (mean) for all the Hertz Rent a Car valid reviews is 57.50% and is based on 36 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 36 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

18.65%

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
Monique 1/10 104 days 100%
Disappointed 1/10 438 days 71%
Rory K 1/10 743 days 25%
Milan 1/10 774 days 21%
Ely 1/10 804 days 18%
Leah 1/10 863 days 13%
Kyla 1/10 1016 days 6%
A very grumpy customer 1/10 1169 days 4%
Ashley Butler 8/10 1569 days 5%
Saili Shah 2/10 1898 days 3%
Megan Anonymous 1/10 1989 days 3%
bob marshall 2/10 2295 days 2%
Tris Sol 1/10 2385 days 2%
Patricia Erni 9/10 2639 days 2%
Manuel Bleiker 9/10 2639 days 2%
John Adams 6/10 3085 days 1%
yardley54 3/10 3116 days 1%
Frank Band 8/10 3395 days 0%
David & Sue Lokkerbol 8/10 3406 days 0%
Urban Reifler 9/10 3431 days 0%
Dane & Julz 7/10 3756 days 1%
Valerie 9/10 3771 days 1%
Angela Stringer 6/10 4181 days 1%
Steve 8/10 4462 days 1%
DimitriD 8/10 4473 days 1%
InkenGermany 9/10 4498 days 1%
Sid 9/10 4597 days 1%
Fothergill 10/10 4662 days 1%
Corinne Henville 9/10 4832 days 1%
Roger Mills 9/10 4899 days 1%
Dorris Schwarz 8/10 4902 days 1%
Anu 8/10 4902 days 1%
Connor 10/10 4925 days 1%
lawrence Walker 8/10 4930 days 1%
Ard 8/10 4931 days 1%
Detlef 7/10 5200 days 1%

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

-3.68% 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 114 days. The Hertz Rent a Car 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The Hertz Rent a Car experience has been adjusted for 75 days. Adjustments are according to the following table.

Days Adjustment
72 -0.81%
73 -0.82%
74 -0.83%
75 -0.84%
76 -0.85%
77 -0.87%
78 -0.88%

Final Ranking Score

15%

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.