what is the big bar in the regression is normal distributed what is the normal distribution of studentized residuals is it normal distributed is the matrix normal distributed is it normal distributed regression is it normal distributed what is the difference between a normal distributed distribution and an anormal distributed distribution? is it normal distributed is it normal distributed arithmetic normal distribution math definition is it normal distributed or not is it normal distributed linear regression? what is the x function of a linear regression? is it normal distributed is it normal distributed is xfit normal distributed when a linear regression is negative what does it mean is it normal distributed is it normal distributed