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Difference between revisions of "Death function"

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(Eugen Grebenik et al., first edition 1958)
(Eugen Grebenik et al., first edition 1958)
 
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<noinclude>
 
<noinclude>
[[en-I:death function]] [[ar-I:جدول الوفيات (جدول)]] [[cs-I:úmrtnostní funkce]] [[de-I:tafelmäßig Gestorbene]] [[es-I:tabla de fallecidos]] [[fi-I:kuolleiden ikäjakauma]] [[fr-I:table des décès]] [[it-I:tavola dei decessi]] [[pl-I:funkcja zgonów]] [[pt-I:FUNÇÃO de mortalidade]] [[ru-I:Числа умирающих]]  
+
[[en-I:death function]] [[ar-I:جدول الوفيات]] [[cs-I:úmrtnostní funkce]] [[de-I:tafelmäßig Gestorbene]] [[es-I:tabla de fallecidos]] [[fi-I:kuolleiden ikäjakauma]] [[fr-I:table des décès]] [[it-I:tavola dei decessi]] [[pl-I:funkcja zgonów]] [[pt-I:FUNÇÃO de mortalidade]] [[ru-I:Числа умирающих]]  
 
</noinclude>
 
</noinclude>
 
{{DEFAULTSORT:Death function}}
 
{{DEFAULTSORT:Death function}}

Latest revision as of 07:50, 11 February 2010

Death function  (DEATH function)


The differences between the number of survivors (431-4) at different ages give the number of deaths within the age interval or the death function1. The ratio of deaths between ages x and x + n to the number of survivors at age x is called the probability of death2 between ages x and x+ n. The central death rate3 is the ratio of deaths between ages x and x + n to the mean population alive at that age. The force of mortality4 or instantaneous death rate4 is the derivative of the natural logarithm of the survivorship function (431-3) taken negatively.

  • 1. The number of deaths between ages x and x + n is written ndx and between ages x and x + 1 is written dx.
  • 2. The probability of dying between age x and x + n is written nqx and between ages x and x + 1 is written qx.
  • 3. The central death rate at age x is written mx.
  • 4. The force of mortality at age x is written µx.


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