Question

current attempt in progress
which of these is a statistical procedure for combining and analyzing data from many studies in order to identify overall trends?
operational research
meta - analysis
recombinant analysis
data synthesis

Explanation:

Meta - analysis is a statistical method that combines results from multiple studies. It helps in identifying overall trends by aggregating data. Operational research focuses on problem - solving and decision - making in organizations. Recombinant analysis is not a standard term in this context. Data synthesis is a broader concept but meta - analysis is the specific statistical procedure for combining study data.

Answer:

meta - analysis