Attally different study of concrete porosity ( y )with respect to :1: = unit weight in concrete specimens yielded the following gures: n: = 16 , _ _ 2 _ 2 so _1,335.34,E y; _331.33,2;3i _173,344.13, 2 31-33:: = 32,333.33, 2 y? = 3,435}: Find the correlation coefficient '1'. {Find your answer to 3 decimal places.)