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Amazon.com > Sports & Outdoors > Exercise & Fitness > Sports > Strength Training Equipment > Arm Machines
Kootek Hand Grip Strenghthener with 5 Resistance Levels ( 50-75-100-125-150 Lbs ) Adjustable...
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From Kootek
This report was last updated 1/17/2019.
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Report Card
Pass Overall Grade
FAIL Deleted Reviews
FAIL Suspicious Reviewers
FAIL Overlapping Review History
PASS Rating Trend
PASS Unverified Purchases
PASS Word Count Comparison
PASS Phrase Repetition
PASS Reviewer Participation
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
Most Trusted Reviews
Broke....... 5 starts till it broke now 1 star [Go to full review]
Jan 4, 2019
100%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (7 words)
- Critical Reviewer (avg. rating: 3.2)
Least Trusted Reviews
A little bit too low of a resistance even on ... [Go to full review]
Aug 17, 2016
0%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (13 words)
- Easy Grader (avg. rating: 4.5)
Analysis Details
Fail Deleted Reviews
We discovered a total of 79 deleted Reviews for this product, with an average rating of 4.7. Even though deleted reviews don't affect the average rating, the fact that action was taken to delete reviews raises some red flags about the integrity of the reviews for the product as whole.
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.
Fail Suspicious Reviewers
One-Hit Wonders
57 of the 1,021 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.3 while the reviewers who have posted more than one review have rated this product an average of 4.4. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Take-Back Reviewers
177 of the 1,021 reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 4.4 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
2% also reviewed:
Amazon Basics AA High-Performance Alkaline... by Amazon Basics
2% also reviewed:
SanDisk Ultra MicroSDXC UHS-I Card with Adapter by SanDisk
1% also reviewed:
The Man In The High Castle - Season 1 (4K UHD) by Alexa Davalos
1% also reviewed:
AmazonBasics High-Speed 18Gbps HDMI Monitor... by AmazonBasics
1% also reviewed:
Amazon Store Card by Synchrony Bank
113 of the 1,021 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.6 while the reviewers who have a more unique product review history rated this product an average of 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Pass Rating Trend
-
- 3%
- Created over 4 days
We counted 1,021 reviews for this product over the span of 1,112 days, an average of 0.9 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 5 or fewer reviews on any given day.
However, we see the following 4 days exceeding this threshold:In total, we found that 27 reviews were created on just 4 days. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Unverified Purchases
45 of the 1,021 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.
Pass Word Count Comparison
-
- 28%
- Have an overrepresented word count
In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 1 group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 287 reviews (or 28%) are within an overrepresented word count group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
Common Phrases in Reviews:
18 reviews
(4.0/5)
(4.0/5)
Common Phrases in Titles:
39 reviews
(4.7/5)
(4.7/5)
12 reviews
(4.6/5)
(4.6/5)
26 reviews
(4.7/5)
(4.7/5)
24 of the 1,021 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Reviewer Participation
-
- 30%
- 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 302 reviewers (or 30%) are within an overrepresented participation group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Reviewer Ease
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4.2, while the average ease score for reviewers in this category is 4.3.
4.2 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
12 of the 1,021 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.
Pass Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
3 of the 1,021 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.