A statistician for a drug company wishes to
determine whether short-term memory scores are affected by the type
of medication in hyperactive children. Sixty hyperactive children
(30 boys and 30 girls) were randomly assigned to receive either
Cylert or Ritalin (two kinds of amphetamines which are CNS
stimulants). Their short-term memory was tested on a 20-point scale
(where 0 = no memory and 20 = perfect memory).
Boys Cylert: 12, 10, 13, 10, 9, 12, 13, 10, 11,
12...