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Derrick just got home from playing soccer on a muddy field. He is curious how different brands of laundry detergent compare in removing mud from clothes, so he sets up an experiment. In one laundry load, he puts his muddy socks with Brand A detergent. In the next load, he puts his muddy jersey with Brand B detergent. In the final load, he puts his muddy shorts with Brand C detergent. Afterward, he noticed that the jersey came out the cleanest. He concludes that Brand B is the best detergent for removing mud from clothes. Is his conclusion valid? A. Yes; the experiment was set up correctly. B. No; there were too many controls in the experiment. C. No; there were too many variables in the experiment. D. No; Derrick was biased toward Brand B.

Sagot :

C. The variables are the fact that he tested different materials and different detegent with each load.

Answer:

Derrick's conclusion is invalid because there were too many variables in the experiment. Each laundry load had a different brand of laundry detergent, as well as a different type of clothing. It is possible that the jersey, shorts, and socks were made of different fabrics, which could affect their ability to be cleaned.

Explanation:

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