# Following Table Gives the Age of Husbands and Wives - Mathematics and Statistics

Sum

Following table gives the age of husbands and wives

 Age of wives (in years) Age of husbands (in years) 20-30 30-40 40-50 50-60 15-25 5 9 3 — 25-35 — 10 25 2 35-45 — 1 12 2 45-55 — — 4 16 55-65 — — — 4

Find:

(a)The marginal frequency distribution of the age of husbands.

(b)The conditional distribution of the age of husbands when the age of wives lies between 25 - 35

#### Solution

 Age of wives (in years) Age of husbands (in years) 20-30 30-40 40-50 50-60 Total 15-25 5 9 3 — 17 25-35 — 10 25 2 37 35-45 — 1 12 2 15 45-55 — — 4 16 20 55-65 — — — 4 4 Total 5 20 44 24 93

(a) The marginal frequency distribution of the age of husbands.

 Age of husbands 20-30 30-40 40-50 50-60 Total Frequency 5 20 44 24 93

(b) The conditional distribution of the age of  husbands when the age of wives lies between 25 - 35.

 Age of husbands 20-30 30-40 40-50 50-60 Total Frequency ___ 10 25 2 37
Concept: Uses of Vital Statistics in Demography
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2014-2015 (March)

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