Answer to Question #210323 in Statistics and Probability for Kangkan

Question

If x and g are two random variables,

there can be at most

(one / two / threelregression line(s)

Answer 1

Solution:

For two random variables, two regression lines can exist.

There may exist two regression lines in certain circumstances. When the variables X and Y are interchangeable with related to causal effects, one can consider X as independent variable and Y as dependent variable (or) Y as independent variable and X as dependent variable.