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Author Question: The term ________ refers to the extent to which a research instrument measures what it says it measures. (Read 113 times) |
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
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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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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.