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Author Question: A null hypothesis of the difference between two population proportions is rejected at the 5 level, ... (Read 47 times) |
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.
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The longest a person has survived after a heart transplant is 24 years.
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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.