Problem 4.9.4

Gray matter                       White matter   \\
Control (L)   Tetanus (R)   Control (L)   Tetanus (R)  \\

   5.7            4.6           3.0           3.6 \\
   6.1            5.9           3.2           2.7 \\
   5.6            5.3           2.7           2.9 \\
   6.1            5.8           3.3           3.4 \\
   6.7            6.6           2.9           3.8 \\
   5.4  	  5.3 	        3.0 	      2.8 \\
   5.9            5.5           3.3           3.1 \\
   5.9            5.4           3.9           3.5 \\
   5.7            5.2           2.8           3.6 \\
   4.8            4.4           2.6           2.6 \\
   5.8            4.9           2.7           3.2 \\