Example 13.15. The following table gives the distribution of students and also of regular players among them, according to age in completed years : Age in years 15 16 17 18 19 20 No. of students 250 200 150 120 100 80 Regular players 200 150 90 48 30 12 Calculate the coefficient of association between majority and playing habit, on the assumption that majority is attained in 18th year.

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