Champion RER8ZWYCB4 (9407) Iridium Replacement Spark Plug, (Pack of 1)
More product info
From Champion
Refresh the report to view the most up-to-date data available:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Most Trusted Reviews
TRUST
- Verified Purchaser
- Easy Grader (avg. rating: 4.8)
Least Trusted Reviews
TRUST
- Verified Purchaser
- Contains repetitive phrases (show)
- Take-Back Reviewer (1 deleted Review; avg. rating: 4.0)
- Overrepresented Participation (posted 10 Reviews)
- Critical Reviewer (avg. rating: 3.6)
Analysis Details
Take-Back Reviewers
60 of the 144 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.
(5.0/5)
(4.5/5)
(3.0/5)
(5.0/5)
(5.0/5)
(5.0/5)
(5.0/5)
(5.0/5)
(5.0/5)
(1.0/5)
22 of the 144 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.
-
- 32%
- From reviewers with an overrepresented participation
We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 46 reviewers (or 32%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.
-
- 0%
- Created on high-volume days
Read more about our Rating Trend test.
11 of the 144 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
-
- 0%
- Have an overrepresented word count
Read more about our Word Count Comparison test.
4% also reviewed:
Bosch 3410 Premium FILTECH Oil Filter for Select... by Bosch Automotive
3% also reviewed:
The Adventures of Tom Sawyer (Bibliobazaar... by Mark Twain
3% also reviewed:
SF Bay Coffee Breakfast Blend 12 Ct Medium Roast... by SAN FRANCISCO BAY
3% also reviewed:
Permatex 81343 Anti-Seize Lubricant, 1 oz. Tube ,... by Permatex
3% also reviewed:
The Sign of the Four (Sherlock Holmes Book 2) by Sir Arthur Conan Doyle
3% also reviewed:
Samsung 32GB up to 48MB/s EVO Class 10 Micro SDHC... by SAMSUNG
3% also reviewed:
Bosch 6054C HEPA Cabin Air Filter for 2010-2015... by Bosch Automotive
3% also reviewed:
Bosch ICON Wiper Blades 21A21A (Set of 2) Fits... by Bosch Automotive
from the same brand
19 of the 144 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
4.3 Product's Average Ease Score
4.4 Category's Average Ease Score
Read more about our Reviewer Ease test.
Brand Repeaters
2 of the 144 reviewers have reviewed other products for this brand. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
-
- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
- 0
- Reviews have been deleted
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.