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Author Question: When a researcher wants a sample to accurately represent the composition of the population, the best ... (Read 56 times) |
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.