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Cedarwood (Large 4 Ounce) Best Essential Oil
More product info From Sun Essential Oils

Amazon Reviews for Cedarwood (Large 4 Ounce) Best Essential Oil
Rating:
24,452 Reviews
30% of potentially unnatural reviews removed (Why?)
Adjusted:
17,132 Reviews




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Report Info:
Last Updated: Dec 5, 2019
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Note: While Amazon.com claims 24,452 reviews, we counted 23,211 available on their site.
Note: While we've examined all 23,211 reviews, our reviewer analysis is based on a sample of 23,206 reviewers.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

Pass Overall Grade
FAIL Deleted Reviews
FAIL Rating Trend
FAIL Incentivized Reviews
FAIL Suspicious Reviewers
FAIL Word Count Comparison
FAIL Phrase Repetition
FAIL Overlapping Review History
WARN Reviewer Participation
PASS Unverified Purchases
PASS Reviewer Ease
PASS Brand Repeats

Most Trusted Reviews

were do I start with tea tree oil. My household ... [Go to full review]
Jan 10, 2016      
59% TRUST
  • Verified Purchaser
  • Contains repetitive phrases (show)
  • Take-Back Reviewer (396 deleted reviews; avg. rating: 4.9)
  • Critical Reviewer (avg. rating: 4.4)


Least Trusted Reviews

Very nice... arrived as described and good price too! [Go to full review]
Feb 24, 2016      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Overrepresented word count (11 words)
  • Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
  • Overlapping Review History: reviewed 1 of 9 top products
  • Overrepresented Participation (posted 9 reviews)
  • Easy Grader (avg. rating: 4.4)


Analysis Details

Fail Deleted Reviews

We discovered a total of 2,661 deleted reviews for this product, with an average rating of 4.5. 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:
  1. 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.
  2. We have no information on reviews that were never published in the first place.
  3. 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.
Read more about the Deleted Reviews test here.

4.5 average rating of deleted reviews

4.5


Show distribution of deleted reviews

Fail Rating Trend

  • 14%
  • Created over 100 days

We counted 23,211 reviews for this product over the span of 1,851 days, an average of 12.5 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 26 or fewer reviews on any given day.

However, we see the following 100 days exceeding this threshold:In total, we found that 3,222 reviews were created on just 100 days. The reviews on these high volume days have rated this product an average of 4.2 while reviews from other days have rated this product an average of 4.0. 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.

from reviews created on high volume days

from reviews created on normal volume days


4.2
4.0


Read more about our Rating Trend test.

Fail Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.


130 of the 23,211 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. Incentivized reviews have rated this product an average of 4.6 while reviews that were not incentivized rated this product an average of 4.0. 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.

from incentivized reviews

from non-incentivized reviews


4.6
4.0


Read more about our Incentivized Reviews test, or check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.

Fail Suspicious Reviewers

Take-Back Reviewers


8,784 of a random sample of 23,206 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 4.2 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 4.0. 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.

from take-back reviewers

from reviewers without previously deleted reviews


4.2
4.0


Read more about our Suspicious Reviewers test.

Fail Word Count Comparison

  • 36%
  • 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 8,427 reviews (or 36%) are within an overrepresented word count group. These reviews have rated this product an average of 4.3, while all other reviews have rated this product an average of 3.9. 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.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.3
3.9


Read more about our Word Count Comparison test.

Fail 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:
833 reviews
(3.0/5)
Common Phrases in Titles:
296 reviews
(3.0/5)


525 of the 23,211 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 3.2 while reviews without substantial repetitive phrases rated this product an average of 4.1. 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.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


3.2
4.1


Read more about our Phrase Repetition test.

Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

1% also reviewed:
Fire by Amazon

Does not include products
from the same brand


3,410 of a random sample of 23,206 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.3 while the reviewers who have a more unique product review history rated this product an average of 4.0. 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.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.3
4.0


Read more about our Overlapping Review History test.

Warn Reviewer Participation

  • 48%
  • From reviewers with an overrepresented participation

We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 11024 of our sample of 23206 reviewers (or 48%) 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.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


3.9
4.2


Read more about our Reviewer Participation test.

Pass Unverified Purchases

821 of the 23,211 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.

from unverified purchasers

from verified purchases


3.9
4.0


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 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 4.4.

4.2 Product's Average Ease Score

4.4 Category's Average Ease Score


4.2
4.4


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


5,531 of a random sample of 23,206 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.

from Brand Repeaters

from Non-Repeaters


4.2
4.0


Read more about our Brand Repeats test.


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