Jenny can conduct a controlled experiment by washing another set of 10 dirty shirts with her old detergent, and then compare the cleanliness of both sets of shirts using a consistent method of evaluation. Additionally, she could consider using a larger number of shirts and possibly involve others to help with the evaluation to reduce bias.
Jenny wants to determine if a new brand name washing detergent is better than her old detergent. She washes 10 dirty shirts with the new washing detergent. After washing, she thinks they are cleaner using the new detergent. What can she do to be sure the new washing detergent works better than the old detergent? Simple Answer
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