Max Wants to Start a Farm to Grow Mussels

question 54

Essay

Max wants to start a farm to grow mussels. He needs to determine the best environment for growing them. He is going to try two different amounts of salt in the water (salinity) and three different water temperatures. For his experiment he has
18 aquariums, each with 20 mussels. He wants to see which environment produces the largest mussels.
-Someone suggested that Max arrange the tanks so that six with the lowest temperature are on one end of the room, and the six with the highest temperature are at the other end of the room. Explain how this could introduce confounding into the experiment.

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