what is data reduction in statistics what technique is used for data reduction? what is data reduction technique what is data reduction technique what is data reduction technique what is data reduction technique what is data reduction technique? what is data reduction what is data reduction technique what is data reduction technique used for what technique is data reduction what is the data reduction technique called what is data reduction technique what is technique for data reduction what is data reduction technique called what is the data reduction technique used for what is data reduction technique what is data reduction used for what is data reduction technique what is data reduction technique