<prompt> Which epidemkiological study gives the most accurate result -Meta analysisCross sectional studyRandomized control trail with double blindingCoho study  <response>: A meta-analysis is a statistical analysis that combines the results of multiple scientific studies. Conceptually, a meta-analysis uses a statistical approach to combine the results from multiple studies in an effo to increase accuracy over individual studies, improve estimates of the size of the effect andor to resolve unceainty when repos disagree. 