The ages of twenty husbands and wives arc given in Tabfe 9.8. Form a two-way frequency table showing the relation- ship between the ages of husbands and wives with class-intervals 20-- 24; 25--29, etc. Calculate the Arithmetic Mean of the two groups after the classi- fication. TABLE 9.8 S. No. Age of husband Age of wife 1 28 23 2 37 30 3 42 40 4 25 26 5 29 47 25 41 7 37 35 8 35 25 23 21 10 41 38 11 27 24 12 39 34 23 20 13 33 31 14 36 29 15 32 35 16 22 23 17 29 27 18 38 34 19 48

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