why are the coefficients of the first principal component all of the same sign what does the coefficient of a first principal component of covariance of a positive-definite covariance matrix do? why are the coefficients of the first principal component of a covariance matrix all of the same sign? what does it mean if a principal component is positive which of the following is true of first principal component coefficients? why do the coefficients of first principal components have the same sign why are the coefficients of the first principal component the same? why is the coefficients of the first principal component all of the same sign why are the coefficients of the first principal component all of the same sign? which of the following is true about all coefficients of a positive-definite covariance matrix? what are the principal coefficient coefficients of a matrix which coefficient of the first principal component must be positive if none of the remaining principal components are negative? why are the coefficients of the first principal component all of the same sign? when all the coefficients in a covariance matrix are positive, the coefficients of all other principal components are all coefficients of the first principal component the same sign why are coefficients of the first principal component all of the same sign? which principal variable has the same coefficient of the first principal component? why are coefficients of all other principal components of the covariance matrix positive why are the coefficients of the first principal component all of the same sign? why do the coefficients of the first principal component have an equal sign