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by styyyaaa
601 days ago
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I mean the data lacks any person's sleep history, but if there is a cohort of bad sleepers, as a group you get a collective pseudo-history (because altough study is done at the same time they are in different life stages) that is no-one's history but might track the average well for that cohort AND take into consideration more than a week. In the similar way sampling the height of 1000 of 1M people will give you a good estimate of the average. |
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