In general, a meta-analysis aims to answer the questions: What is the effect of a program or treatment, based on all the relevant research to date?
Kunalokho, kugxilwe kwenziwa ucwaningo ukuphendula umbuzo othile okuningi: uyini umphumela isilinganiso walesi uhlobo oluthile lokwelapha nale ukuqaliswa letsite leli nani labantu labahlanganyeli ngalesi sikhathi?