4. 5 .The natural population replacement fertility rate in the U.S a) 2.1 births per woman b) 3.9 births per woman c) 3.1 births per woman d) 4.2 births per woman The rate at which new disease or mortality events will occur in a population in a given period of time. a) The biological gradient

“replacement level fertility” is the total fertility rate—the average number of children born per woman—at which a population precisely replaces itself from one generation to the next, without migration. This fee is more or less 2.1 kids in line with females for maximum countries, even though it may modestly vary with mortality rates.

Conclusion: The TFR is commonly surely defined because of the average number of children per woman which makes it an intuitive measure of fertility. The TFR is calculated by way of including up all of the age-precise fertility charges, multiplying this sum by 5 (the width of the age-organization c program language period), after which dividing by using 1,000.

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