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Author Question: We are about to test a hypothesis using data from a well-designed study. Which is true?I. A large ... (Read 148 times) |
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.