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.

Question

Does this procedure describe a completely randomized design for this experiment?

Yes, the treatments were randomly assigned to the dogs.
Yes, the treatment groups have the same number of dogs.
No, the veterinarian did not use dogs of the same breed.
No, the names were taken in order, so there was no randomization.

Answer 1

Yes, the names were taken in order, so there was no randomization.