Paper 1 · Research Aptitude
A statistical technique used for a large number of variables to establish whether there is a tendency of groups to be interrelated is
ASimple correlation
BMultiple correlation
CFactor analysis ✓ Correct
DRegression
Correct answer: (C) Factor analysis — The technique for many variables to find whether groups tend to be interrelated is factor analysis, so that is the answer.
Explanation
★The technique for many variables to find whether groups tend to be interrelated is factor analysis, so that is the answer.
★Factor analysis works on a large set of variables at once.
★So it finds whether groups of variables tend to cluster and be interrelated as underlying factors.
★Simple correlation measures the relationship between only two variables.
★Multiple correlation relates one variable to several others together, not this grouping.
★Regression predicts one variable from others, so grouping many variables into related factors is factor analysis.
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