A study was conducted to determine whether head flattening in preterm infants was prevented by placing their heads on a water pillow.The first 50 preterm infants admitted to a newborn intensive care unit during a specific year were assigned to either a usual care group or a treatment group.What type of sampling strategy is represented by this research plan?

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The Answer of A study was conducted to determine whether head flattening in preterm infants was prevented by placing their heads on a water pillow.The first 50 preterm infants admitted to a newborn intensive care unit during a specific year were assigned to either a usual care group or a treatment group.What type of sampling strategy is represented by this research plan?

A Study Was Conducted to Determine Whether Head Flattening in Preterm