Which of the following is defined as a systematic method of evaluating statistical data based on the results of several independent studies of the same problem?

Meta-analysis is the systematic method of evaluating statistical data by combining the results of several independent studies of the same problem.

Factor analysis reduces many variables into a few underlying factors within one dataset.

Systematic analysis is a vague label and not this specific statistical technique.

Subjective analysis relies on personal judgement rather than pooled statistical results.

Meta-analysis increases statistical power by pooling effect sizes across studies.

It sits at the top of the evidence hierarchy alongside systematic reviews.