A pediatrician wants to determine the relation that may exist between a child's ' (d) Determine if a linear relation exists between height and head height and head circumference. She randomly selects 8 children, measures their circumference. (Note that the linear correlation coefcient between the height and head circumference, and obtains the data shown in the table. height and head circumference of a child is r= 0.893.) Height Head Circumference E (inches) (inches) 27.25 17.4 ; The critical value is Find the critical value. 25.25 17 . 26.5 172 (Round to three deCImal places as needed.) 25.75 16.9 27.5 17.5 26.25 17.2 25.75 17.2 26.75 17.4 \f10 0.632 11 0.602 12 0.576 13 0.553 14 0.532 15 0.514 16 0.497 17 0.48218 0.468 19 0.456 20 0.444 21 0.433 22 0.423 23 0.413 24| 0.404