Identify which of these designs is most appropriate for the given experiment: co

Question

Identify which of these designs is most appropriate for the given experiment: completely randomized design, randomized block design, or matched pairs design. Currently, there is no approved vaccine for the prevention of infection by a certain virus. A clinical trial of a possible vaccine is being planned to include subjects treated with the vaccine while other subjects are given a placebo. The most appropriate is randomized block design.Identify which of these designs is most appropriate for the given experiment: completely randomized design, randomized block design, or matched pairs design. Currently, there is no approved vaccine for the prevention of infection by a certain virus. A clinical trial of a possible vaccine is being planned to include subjects treated with the vaccine while other subjects are given a placebo. The most appropriate design is...?

Explanation / Answer

Answer - Completely Randomized Design

Explanation - With a randomized block design, we divide the participants in subgroups such that variability within blocks is less than variability between blocks. Then participants within each block are randomly assigned to treatment conditions.

While in a completely randomized design, the subjects are randomly assigned to the treatment without creating blocks.

Note that we don't need to divide subjects in two groups based on some criteria as they are all same. So, we will use a comppletely randomized design.

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