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
49 Valid Reviews
The Avis Rental Cars experience has a total of 56 reviews. There are 49 valid reviews that are included when calculating the ranking score and 7 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 49 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 | 22 |
|
45% |
46.12% Average
The raw data average (mean) for all the Avis Rental Cars valid reviews is 46.12% and is based on 49 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 49 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
38.93%
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 |
|---|---|---|---|
| TConway | 1/10 | 1706 days | 100% |
| Michelle | 1/10 | 1735 days | 94% |
| Barry Lynch | 1/10 | 1766 days | 89% |
| John Matthews | 1/10 | 1797 days | 87% |
| Nathan | 1/10 | 1980 days | 81% |
| Timothy OConnor | 1/10 | 2100 days | 76% |
| James Mallen | 1/10 | 2131 days | 75% |
| Celeste | 1/10 | 2131 days | 75% |
| Ryan | 1/10 | 2162 days | 74% |
| melvyn begley | 1/10 | 2376 days | 67% |
| Jennifer Rogers | 1/10 | 2406 days | 66% |
| Izzy | 1/10 | 2437 days | 65% |
| Campbell Brebner | 1/10 | 2526 days | 62% |
| Chris Monk | 2/10 | 2526 days | 70% |
| Janine | 1/10 | 2679 days | 57% |
| Trevor Robertson | 1/10 | 2770 days | 54% |
| Janelle Mcaliece | 1/10 | 2770 days | 54% |
| Kate Campbell | 1/10 | 2801 days | 53% |
| Jim Skeath | 1/10 | 2860 days | 50% |
| Mike Mulberry | 1/10 | 2982 days | 46% |
| Tim Evans | 4/10 | 3044 days | 72% |
| Cecile | 6/10 | 3223 days | 82% |
| Jadon Calvert | 1/10 | 3227 days | 38% |
| H Conway | 1/10 | 3926 days | 14% |
| Indu Priya | 1/10 | 4322 days | 0% |
| Oliver Kalmbach | 8/10 | 4362 days | 0% |
| firsttimeparents | 2/10 | 4444 days | 18% |
| Birds Tubbs | 10/10 | 4613 days | 42% |
| Peter Kent | 9/10 | 4615 days | 41% |
| Claus Lage | 7/10 | 4987 days | 39% |
| Helene Descamps | 8/10 | 5010 days | 41% |
| James Jackson | 8/10 | 5012 days | 41% |
| Christian | 10/10 | 5379 days | 42% |
| andres | 7/10 | 5441 days | 39% |
| Colin S | 9/10 | 5457 days | 41% |
| Deede K | 8/10 | 5457 days | 41% |
| Ruth Colmer | 8/10 | 5459 days | 41% |
| Hansjoerg Ehrmann | 8/10 | 5460 days | 41% |
| Gebert | 9/10 | 5460 days | 41% |
| JanetH | 8/10 | 5741 days | 41% |
| Ray | 8/10 | 6079 days | 41% |
| Jacinta | 8/10 | 6084 days | 41% |
| Anne and Derek | 8/10 | 6085 days | 41% |
| David Buckley | 9/10 | 6093 days | 41% |
| Carmen | 10/10 | 6094 days | 42% |
| Bill Lambert | 7/10 | 6109 days | 39% |
| Leon | 9/10 | 6129 days | 41% |
| Meiki | 5/10 | 6140 days | 31% |
| Dagmar | 9/10 | 6141 days | 41% |
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
-6.87% 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 50 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 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.81% |
| 198 | -3.83% |
| 199 | -3.85% |
| 200 | -3.87% |
| 201 | -3.89% |
| 202 | -3.91% |
| 203 | -3.93% |
| … | … |
Balancing Adjustment
32.44% 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
65%
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.