Ireally need i don't get it. i did a ratio of boys: girls but the i didn't know what to do. i have to do it in ratios so solve in ratios, you so so so so so much!

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.