Mattress
Ratings > Mattress Comparison
Mattress
Research Sample Sizes
The sample size for each mattress brand is the number of owner
reviews / comments that our findings are based on.
We at SleepLikeTheDead.com are not expert statisticians. However,
because of the large sample sizes we have collected, we believe
that our findings are accurate. In particular, we believe
that our comfort ratings have a maximum margin of sampling
error of ±4 percentage points. We believe this because
no matter how much data (information from owner reviews /
comments) we add to each brand, the comfort rating does not
change beyond a few percentage points. Click here for more information on our research methodology and why it
is highly credible.