Experimental design is the organization and interpretation of the experiment to conclude. For the experiment, the items should be labeled from 1 to 1200 and sorted into a group of three with 400 items each.
<h3>What is the design of the experiment?</h3>
Design is the allocation of the groups and the objects in the groups for the efficient experimental setup and drawing of the conclusion. For the given case the objects should be labeled up to 1200.
These items should be separated into three groups containing 400 items each so that the testing of the parachute reliability can be checked.
Therefore, option B. items should be divided into three groups of 400 items each.
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