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Question
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
Sum
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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 |
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Uses of Vital Statistics in Demography
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