5. In a sample of 500 children, 200 came from higher income group, and the rest from iower income group. The number of delinquent children in these groups respectively was 25 and 100. Calculate the...

Extracted text: 5. In a sample of 500 children, 200 came from higher income group, and the rest from iower income group. The number of delinquent children in these groups respectively was 25 and 100. Calculate the coefficient of association between delinquency and income groups.