| 3
Important Kinds of Rates |
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| # of
live births to residents |
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| in an area in a calendar year |
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| Natality (birth)
rate = |
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| Population
in the area |
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| in the same year |
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| # of cases of residents with illness |
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| in an
area in a calendar year |
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| Population
in the area |
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| in the same year |
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| # of
deaths to residents |
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| in an area in a calendar year |
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| Mortality
(fatality) rate = |
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| Population
in the area |
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| in the same year |
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