It is important to be able to understand and interpret statistics. Match the appropriate term with this description to complete the statement below ___#1____ is is a statistical method to combine the results from separate studies on a program, policy, or topic in order to estimate its effect on an outcome. SSDP systematically evaluates all credible evaluations we can locate on each topic. The __#2___ measured are the types of program impacts that were measured in the research literature (for example, crime or educational attainment). Treatment N represents the total number of individuals or units in the __#3_____ across the included studies