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 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.
Ezi Car Rental
Valid Reviews
66 Valid Reviews
The Ezi Car Rental experience has a total of 78 reviews. There are 66 valid reviews that are included when calculating the ranking score and 12 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 66 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 18 |
|
27% |
| 9/10 | 9 |
|
14% |
| 8/10 | 5 |
|
8% |
| 7/10 | 1 |
|
2% |
| 6/10 | 1 |
|
2% |
| 5/10 | 1 |
|
2% |
| 4/10 | 1 |
|
2% |
| 3/10 | 0 |
|
0% |
| 2/10 | 4 |
|
6% |
| 1/10 | 26 |
|
39% |
54.09% Average
The raw data average (mean) for all the Ezi Car Rental valid reviews is 54.09% and is based on 66 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 66 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
71.44%
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 |
|---|---|---|---|
| Alex.zzhang@live.com | 1/10 | 78 days | 41% |
| Pazul | 10/10 | 170 days | 100% |
| Lee | 1/10 | 170 days | 40% |
| Bernice Booth | 1/10 | 231 days | 40% |
| Lourdes | 1/10 | 231 days | 40% |
| Catherine | 1/10 | 262 days | 39% |
| Gillian K | 10/10 | 262 days | 98% |
| Greg | 10/10 | 291 days | 97% |
| Mario | 10/10 | 353 days | 94% |
| Okii Voyager | 1/10 | 506 days | 35% |
| Henry brett | 10/10 | 536 days | 85% |
| Denise | 10/10 | 567 days | 83% |
| Surprise cleaning fee from ez car rental | 5/10 | 687 days | 56% |
| Bev | 10/10 | 718 days | 72% |
| Emma | 1/10 | 962 days | 19% |
| Rachel | 1/10 | 1205 days | 10% |
| Kolora | 10/10 | 1509 days | 10% |
| Kimberley | 10/10 | 1631 days | 7% |
| D Collins | 1/10 | 1723 days | 2% |
| Peter | 10/10 | 1752 days | 5% |
| Matt Tofia | 2/10 | 1752 days | 2% |
| Rachael | 1/10 | 2058 days | 1% |
| Massis | 1/10 | 2089 days | 1% |
| Bob Swanson | 9/10 | 2089 days | 4% |
| Brent Jackson | 1/10 | 2117 days | 1% |
| Leila Begleiter | 10/10 | 2179 days | 4% |
| Kerrie | 1/10 | 2240 days | 1% |
| Paul Löffler | 1/10 | 2301 days | 1% |
| Rachel Travers | 1/10 | 2301 days | 1% |
| Tom Butlin | 10/10 | 2332 days | 3% |
| Anthony | 4/10 | 2362 days | 2% |
| Art Hunt | 10/10 | 2423 days | 3% |
| Kent | 10/10 | 2423 days | 3% |
| Lyn Watson | 1/10 | 2454 days | 1% |
| John Ridge | 10/10 | 2482 days | 3% |
| Scott Hargrave | 1/10 | 2758 days | 1% |
| Karen Gould | 1/10 | 2847 days | 1% |
| Juana Gutierrez | 9/10 | 2878 days | 2% |
| B Thomas | 2/10 | 2878 days | 1% |
| Laszlo Veréb | 2/10 | 2878 days | 1% |
| Joel Virtanen | 8/10 | 2900 days | 2% |
| Maree Smith | 1/10 | 2909 days | 0% |
| Alan | 1/10 | 2909 days | 0% |
| Dean P | 1/10 | 2939 days | 0% |
| Mary Phillips | 1/10 | 3153 days | 0% |
| Steve | 1/10 | 3153 days | 0% |
| Amar Zekic | 1/10 | 3184 days | 0% |
| Dennis Xuereb | 8/10 | 3187 days | 1% |
| Jeff Young | 6/10 | 3244 days | 1% |
| Jeffrey Nelson | 9/10 | 3275 days | 1% |
| CHuynh | 2/10 | 3366 days | 0% |
| Alex Adams | 1/10 | 3428 days | 0% |
| Envor Valensky | 1/10 | 3519 days | 0% |
| Hannah Bean | 9/10 | 4656 days | 0% |
| Nathalie Verzeletti | 8/10 | 5001 days | 0% |
| Chris Darlington | 10/10 | 5019 days | 0% |
| Matthiis & Femke | 7/10 | 5383 days | 0% |
| Aaron | 9/10 | 5386 days | 0% |
| Viktoria Stoffel | 10/10 | 5717 days | 0% |
| Rachel | 9/10 | 5760 days | 0% |
| Claire | 9/10 | 5760 days | 0% |
| schenk | 8/10 | 5761 days | 0% |
| Caroline | 9/10 | 5767 days | 0% |
| De Wijn | 10/10 | 6096 days | 0% |
| Greg & Lynette | 9/10 | 6103 days | 0% |
| Michael | 8/10 | 6452 days | 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
-4.09% 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 44 days. The Ezi Car Rental 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 Ezi Car Rental experience has been adjusted for 54 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 51 | -1.03% |
| 52 | -1.05% |
| 53 | -1.07% |
| 54 | -1.09% |
| 55 | -1.11% |
| 56 | -1.13% |
| 57 | -1.15% |
| … | … |
Balancing Adjustment
8.60% 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
76%
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.