Question: A researcher wants to test if an a new program implementation makes a difference in infant outcomes. The researcher reviews baseline infant results on specific

A researcher wants to test if an a new program implementation makes a difference in infant outcomes. The researcher reviews baseline infant results on specific variables. After implementation of the program over a two year period the research reviews data on the same variables on infants that delivered in the last 6 months. Which test would the researcher use to evaluate the results

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