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Question 1

Key difference between correlation and regression

Answer 1

1. regression seeks how X causes Y to change and what would result of the analysis would change if X and Y are swapped. However, the X and Y variables are interchangeable in correlation
2. regression assumes X is fixed with no error, like dose amount or temperature. But X and Y in correlation are random variables, like height, weight, heart rate, etc.
3. regression produces an entire equation, but correlation is a single statistic