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Author Question: What is the major drawback of using percentile ranks to describe students' performance on a ... (Read 51 times) |
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.