# 8.2.1 
var1=c(32.1,30.6,33.7,29.7)
var2=c(34.5,32.6,34.6,31.0)

# 8.2.4
mcpp=   c( 1.1, 1.3, 1.0, 1.7, 1.4, 0.1, 0.5, 1.6,-0.5)
placebo=c( 0.0,-0.3, 0.6, 0.3,-0.7,-0.2, 0.6, 0.9,-2.0)

# 8.2.6
treated=c(69.50,67.00,70.75,68.50,66.75,68.50,69.50,69.00,66.75,69.00,
          69.50,69.00,70.50,68.00,69.00)
control=c(70.00,69.00,69.50,69.25,67.75,66.50,68.75,70.00,66.75,68.50,
          69.00,69.75,70.25,66.25,68.25)

# 8.4.5
placebo=  c(37,52,63, 2,25,29,15,52,19,12, 7, 9,65,52, 6,17,54,27,36, 5)
valproate=c( 5,22,41, 4,32,20,10,25,17,14, 8, 8,30,22,11, 1,31,15,13, 5)

# 8.4.6
northern=c( 0, 0, 0, 2, 0, 2, 1, 0)
carolina=c( 9, 6,22,16,17,33,24,40)