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Volume :5 Issue : 19 1979      Add To Cart                                                                    Download

USUAL EXPECTED LIFE AND NORMAL AGE AT DEATH KUWAITI POPULATION 1975

Auther : By Dr. Mostafa H. El-Shalakany

 

The life table model is theoretically appealing in the study of duration of random variables arising from situations in which a well-defined population is subject to discrimination due to the operation of a certain force of attrition as time (age) elapses. As such, it means a great demand by demographic, biomedical and insurance researchers for methods to analyze various attrition phenomena arising in their fields.

The life expectancy column (xe) is an ultimate objective of constructing a life table. Several indices have been proposed by various authors to describe the characteristics of this column. Among these are the two considered in this paper, namely:

    1. Usual expected live.
    2. Normal age at death.

Usual expected life at a particular age may be defined as the average number of year remaining for half the survivors at that age, assuming the current mortality conditions to prevail for the rest of their lives. As such, it may be looked upon as a measure of the magnitude, of the mortality distribution. The value of this index for Kuwaiti in 1975 is found to be 71.4 years for males and 76.4 for females.

The normal age at death is another index describing the level of mortality. First introduced by Lexis, it may be defined as the exact oldest age at which the maximum number of death occurs, i.e. the age at which the mortality schedule reaches its maximum. The determination of this index required the use of an appropriate model for the graduation of the mortality schedule. Approximation formulas, however, have been suggested to avoid the problem of specifying this appropriate model. Josef Major suggests the formula:

Normal age at death= 60 +e؛60

This index is computed for Kuwaiti using the graduation approach and the approximate formula. The values obtained are as follows:

Graduation Approximate

Approach formula

Males 71.2 76.2

Females 76.1 78.2

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