Table 13.1.1a.  Means on post-test according to pre-test score

Pre-test score			Experimental group			Control group
  (Midpoint)		n	  Post-test mean		n	    Post-test mean

   110			 0		  .			 1		110.98		
   105			 0		  .			 5		 95.58
   100			 0		  .			13		103.75
    95			 2		77.74			21		 92.71
    90			 2		69.54			27		 86.99
    85			 6		87.11			41		 84.13
    80			10		76.25			48		 84.85
    75			23		72.52			64		 83.20
    70			26		67.73			55		 78.92
    65			33		67.16			60		 76.31
    60			57		64.78			45		 78.50
    55			64		62.93			47		 70.29
    50			56		61.38			30		 74.12
    45			50		56.51			25		 66.11
    40			54		51.87			 7		 61.14
    35			42		53.91			 4		 70.58
    30			35		54.17			 4		 43.44
    25			20		53.69			 2		 59.24
    20			 6		43.57			 0		  ---
    15			 5		41.32			 1		 37.95
    10			 6		34.36			 0		  ---
     5  	  	 3		44.34			 0		  ---