A researcher for a consumer products company is field testing a new formula for laundry detergent. He has contracted with 60 fam
ilies, each with two children, who have agreed to test the product. He randomly assigns 30 families to the group that will use the new formula and 30 to the group that will use the company’s current detergent formula. The most important reason for this random assignment is that?
randomization creates validity in research experiments
Explanation:
According to the information provided within the question it seems that the most important reason for this is that randomization creates validity in research experiments. By making the assignments random you increase the odds of creating two groups of 30 families that are as similar to each other as possible, thus drastically increasing the odds that the detergent is the only different variable in all the families of each group. Therefore increasing the validity of the results.
