Kia ora, 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 Avis Rental Cars.
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.
Avis Rental Cars
Valid Reviews
50 Valid Reviews
The Avis Rental Cars experience has a total of 56 reviews. There are 50 valid reviews that are included when calculating the ranking score and 6 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 | 3 |
|
6% |
| 9/10 | 6 |
|
12% |
| 8/10 | 10 |
|
20% |
| 7/10 | 3 |
|
6% |
| 6/10 | 1 |
|
2% |
| 5/10 | 1 |
|
2% |
| 4/10 | 1 |
|
2% |
| 3/10 | 0 |
|
0% |
| 2/10 | 2 |
|
4% |
| 1/10 | 23 |
|
46% |
45.40% Average
The raw data average (mean) for all the Avis Rental Cars valid reviews is 45.40% 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
24 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 24 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 24 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 3 |
|
13% |
| 9/10 | 6 |
|
25% |
| 8/10 | 10 |
|
42% |
| 7/10 | 3 |
|
13% |
| 6/10 | 1 |
|
4% |
| 5/10 | 1 |
|
4% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
81.67% Average
The raw data average (mean) for all the Avis Rental Cars face-to-face reviews is 81.67% and is based on 24 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
27.95%
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 |
|---|---|---|---|
| Amy | 1/10 | 81 days | 100% |
| TConway | 1/10 | 1756 days | 5% |
| Michelle | 1/10 | 1785 days | 5% |
| Barry Lynch | 1/10 | 1816 days | 5% |
| John Matthews | 1/10 | 1847 days | 5% |
| Nathan | 1/10 | 2030 days | 5% |
| Timothy OConnor | 1/10 | 2150 days | 4% |
| James Mallen | 1/10 | 2181 days | 4% |
| Celeste | 1/10 | 2181 days | 4% |
| Ryan | 1/10 | 2212 days | 4% |
| melvyn begley | 1/10 | 2426 days | 4% |
| Jennifer Rogers | 1/10 | 2456 days | 4% |
| Izzy | 1/10 | 2487 days | 4% |
| Campbell Brebner | 1/10 | 2577 days | 4% |
| Chris Monk | 2/10 | 2577 days | 4% |
| Janine | 1/10 | 2730 days | 3% |
| Trevor Robertson | 1/10 | 2821 days | 3% |
| Janelle Mcaliece | 1/10 | 2821 days | 3% |
| Kate Campbell | 1/10 | 2852 days | 3% |
| Jim Skeath | 1/10 | 2911 days | 3% |
| Mike Mulberry | 1/10 | 3033 days | 3% |
| Tim Evans | 4/10 | 3095 days | 4% |
| Cecile | 6/10 | 3273 days | 5% |
| Jadon Calvert | 1/10 | 3277 days | 2% |
| H Conway | 1/10 | 3976 days | 1% |
| Indu Priya | 1/10 | 4372 days | 0% |
| Oliver Kalmbach | 8/10 | 4412 days | 2% |
| firsttimeparents | 2/10 | 4494 days | 1% |
| Birds Tubbs | 10/10 | 4663 days | 2% |
| Peter Kent | 9/10 | 4665 days | 2% |
| Claus Lage | 7/10 | 5037 days | 2% |
| Helene Descamps | 8/10 | 5060 days | 2% |
| James Jackson | 8/10 | 5062 days | 2% |
| Christian | 10/10 | 5429 days | 2% |
| andres | 7/10 | 5491 days | 2% |
| Colin S | 9/10 | 5507 days | 2% |
| Deede K | 8/10 | 5507 days | 2% |
| Ruth Colmer | 8/10 | 5509 days | 2% |
| Hansjoerg Ehrmann | 8/10 | 5510 days | 2% |
| Gebert | 9/10 | 5510 days | 2% |
| JanetH | 8/10 | 5791 days | 2% |
| Ray | 8/10 | 6129 days | 2% |
| Jacinta | 8/10 | 6134 days | 2% |
| Anne and Derek | 8/10 | 6135 days | 2% |
| David Buckley | 9/10 | 6143 days | 2% |
| Carmen | 10/10 | 6144 days | 2% |
| Bill Lambert | 7/10 | 6159 days | 2% |
| Leon | 9/10 | 6179 days | 2% |
| Meiki | 5/10 | 6190 days | 2% |
| Dagmar | 9/10 | 6191 days | 2% |
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 Avis Rental Cars experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.07% 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 41 days. The Avis Rental Cars experience has 0 recent rankings. Adjustments are according to the following table:
| Recent Reviews | Adjustment |
|---|---|
| 0 | -3.00% |
| 1 | -2.63% |
| 2 | -1.50% |
| 3 | -0.38% |
| 4 | -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 Avis Rental Cars experience has been adjusted for 53 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 50 | -1.01% |
| 51 | -1.03% |
| 52 | -1.05% |
| 53 | -1.07% |
| 54 | -1.09% |
| 55 | -1.11% |
| 56 | -1.13% |
| … | … |
Balancing Adjustment
33.89% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
58%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.