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.