which variable in each random variable represents a function of different random variables? are reciprocal variables independent is mutually exclusive dummies independent is hat independent or independent are mutually exclusive dummies independent is beta independent are mutually exclusive dummies independent are mutually exclusive dummies independent when mutually exclusive dummies are considered independent are mutually exclusive dummies independent is coefficient independent in regression if a variable is independent which variable is considered independent? are mutually exclusive variables independent are mutually exclusive coefficients independent are mutually exclusive dummies independent are mutually exclusive dummies independent is beta independent are mutually exclusive variables independent are mutually exclusive dummies independent are dummies independent