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Author Question: When a researcher wants a sample to accurately represent the composition of the population, the best ... (Read 46 times) |
Did you know?
Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
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Everyone has one nostril that is larger than the other.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.