Question

The following table gives the ages 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

(ii) The conditional frequency distribution of the age of husbands when the age of wives lies between 25 - 35.
(i) The marginal frequency distribution of the age of husbands.Find :

Answer 1

 

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

Now, marginal distribution of age of husbands.

Age (years	20 – 30	30 – 40	40 – 50	50 – 60	Total
Number	5	20	44	24	93

Now marginal distribution of husband, when the age of wives lies between 25 – 35 

Age (years	20 – 30	30 – 40	40 – 50	50 – 60	Total
Number	-	10	25	2	37