You are a perinatal and reproductive epidemiologist and are given an Excel spreadsheet, Project3.xlsx, which contains 1000 records. There are a total of 5 hospitals in the dataset and in each of these hospitals, there were three possible types of infant outcomes: normal (>= 2500 grams), low birth weight (<2500 grams but >= 1500 grams), and very low birth weight (< 1500 grams). You are interested in conducting a sub-study in which you would like to randomly select 3 very low birth weight, 10 low birth weight, and 25 normal infants from each hospital.
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