Question

Suppose the eye surgeon in Part (3) abo effects of four types o dro ve is proposing a different study to determine the f eye drops on corneal flexibility after LASIK surgery. One type of eye ps will contain an antibiotic, one will contain an anti-inflammatory, one will contain both the anti-biotic and the anti-inflammatory, while the fourth type will be only saline (i.e. no antibiotic and no anti-inflammatory). Here, twenty patients needing surgery on both eyes will be recruited for the study and she will again conduct all surgeries. The twenty patients will be randomly divided into four groups of five patients and each of the four types of eye drops will be assigned drops to both eyes four times a day for one month. The comeal flexibility for each eye will be measured separately one month after surgery to one group. After surgery, each patient will apply their assigned a. Specify the treatment structure and identify the treatment factors & their levels. b. Identify the experimental unit and the observational unit. c. Identify the number of replicates per treatment group.

Answer 1

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