A medical study of heart surgery investigates the effect of a drug called a beta-blocker on the pulse rate of the patient during surgery. The pulse rate will be measured at a
specific point during the operation. The investigators have eight thousand patients
scheduled for surgery from most severe to least severe cases. The first 4000 patients to
have surgery will receive the beta-blocker and the last 4000 patients to have surgery will
not. Identify each as true or false.
The beta-blocker is the treatment.
True or false?