Design a controlled experiment to test the hypothesis that water acidification caused by acidic rain would inhibit the growth of Elodea, a freshwater plant (see Figure 2.17 ). | Numerade

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Sandia National Laboratory to conduct controlled fire experiment on Tuesday

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A psychologist employs a two-factor experiment to study the combined effect of sleep deprivation and alcohol consumption on the performance of automobile drivers. Before the driving test, the subjects go without sleep for various time periods and then drink a glass of orange juice laced with controlled amounts of vodka. Their performance is measured by the number of errors made on a driving simulator. Two subjects are randomly assigned to each cell, that is, each possible combination of sleep de