# Question: a What is a confounded comparison and when does it

(a) What is a confounded comparison, and when does it occur?

(b) What is an unconfounded comparison, and when does it occur?

(c) Why don’t we perform post hoc tests on confounded comparisons?

(b) What is an unconfounded comparison, and when does it occur?

(c) Why don’t we perform post hoc tests on confounded comparisons?

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