A veterinarian knows that the supplement glucosamine is beneficial for dogs' joints. He wants to determine if a
supplement with both glucosamine and chondroitin
would be more beneficial than glucosamine alone for
dogs' joint health. The veterinarian asks the owners of
dogs with known joint issues if they would be willing to
have their dog participate in his study, and 32 owners
agree to the study. The dogs' names are written on
equal-sized slips of paper. The veterinarian selects the
first 16 slips of paper. These dogs are given the
glucosamine treatment. These dogs are given the
glucosamine treatment. The other 16 dogs are given
the glucosamine with chondroitin treatment. After six
months, the dogs' joint health is measured for each
treatment and compared
Does this procedure describe a completely randomized
design for this experiment?
O Yes, the treatments were randomly assigned to the
dogs
O Yes, the treatment groups have the same number of
dogs
O No, the veterinarian did not use dogs of the same
breed
O No, the names were taken in order, so there was no
randomization