Question

jenny wants to determine if a new brand name washing detergent is better than her old detergent. She washes ten dirty t-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?

Answer 1

What Jenny has to do to make sure that the new detergent works better than the old one is to wash the same kind, amount or weight of laundry with the same amount of soap, both old and new detergent, for the same amount of time and then compare the results. This comparison is a visual, textual and olfactory work and the detergent favored will depend on Jenny's tastes. She also could add the variable price as a decision factor.

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