A community-based study of respiratory illness during the first year of life was performed in Central India. The following table represents the data according to socio-economic status, the number of children, and the number of children who developed symptoms of respiratory illness:

This data was collected through face-to-face interviews involving a team of pediatricians and social scientists. The community belonged to a rural area in Central India (State of Chhattisgarh), where there were 1500 households. A total of 100 households were selected with fifty each from the left and right of the main lane of the community. To facilitate the process of interviews, interviewers collected information through a validated questionnaire in the local language, which was pilot-tested in the community.

what is the percentage of total children who suffered from illness across all three strata?

Correct option is B

calculate the percentage of total children who suffered from illness across all three strata:
1. Total number of children across all strata:
· Low socio-economic: 50 children
· Medium socio-economic: 100 children
· High socio-economic: 100 children Total = 50 + 100 + 100 = 250 children
2. Total number of children with illness:
· Low socio-economic: 10 children
· Medium socio-economic: 10 children
· High socio-economic: 5 children Total with illness = 10 + 10 + 5 = 25 children
3.

Percentage of children with illness